KV2 audio EX Series Speakers User Guide

KV2 audio EX Series Speakers

Specifications

• Model: EX Series Speakers
• Power Requirements: 115V or 230V
• AC Power Connector: PowerCon 3-pole AC main system
• Current Requirements: 2.5 Amps max at 115V AC per EX6
• Amplifier Type: Class A/B, push-pull circuitry
• Enclosure Design: Not specified

Product Usage Instructions

1. AC Power Requirements

The EX6 speakers operate on either 115V or 230V modes. The PowerCon 3-pole AC main system with locking connectors is used to prevent accidental disconnection.

2. Audio Signal Specifications

The EX6 features an integrated amplifier module that includes amplifier power, electronic crossovers, phase alignment, equalization, and speaker protection. The high-frequency compression driver is powered by KV2 Audio’s low intermodulation distortion circuitry for high audio quality.

3. Frequency Characteristics

The EX6 is designed to provide a true dynamic representation of the source audio with low distortion and loss of information across the frequency spectrum.

4. Using Multiple Boxes

Up to six EX6 speakers can be powered from one 15A breaker at 115V, and up to twelve EX6 speakers at 230V. Ensure proper power distribution and avoid overloading the circuit.

5. Drawings

Refer to the provided drawings for detailed information on the physical dimensions and layout of the EX6 speakers.

Frequently Asked Questions

• Q: Can I change the operating voltage mode of the EX6 in the field?
  • A: Yes, although pre-configured at the factory, the unit’s operating voltage mode can be changed in the field following the provided instructions.
• Q: What is the maximum number of EX6 speakers that can be powered from a single breaker?
  • A: Up to six EX6 speakers can be powered from one 15A breaker at 115V, and up to twelve EX6 speakers at 230V, ensuring proper current requirements are met.

EX Series Speakers
User Guide
· EX6 · EX26 · EX10 · EX28 · EX12 · EX15
The Future of Sound. Made Perfectly Clear.
At KV2 Audio our vision is to constantly develop technologies that eliminate distortion and loss of information providing a true dynamic representation of the source. Our aim is to create audio products that absorb you, place you within the performance and deliver a listening experience beyond expectations.

EX Series Speakers · Important Safety Instructions

Important Safety Instructions

Before using your EX Series Speakers, be sure to carefully read the applicable items of these operating instructions and the safety suggestions.
1. Read all product instructions. 2. Keep printed instructions, do not throw away. 3. Respect and rewiew all warnings. 4. Follow all instructions. 5. Do not use this unit near water, in unprotected out door areas or in rain or wet conditions. 6. Clean only with dry cloth. 7. Do not block any ventilation openings. 8. Install in accordance with KV2 Audio’s recommended installation instructions. 9. Do not install near any heat sources such as heat radiators, heat registers, stoves or other apparatus
that produce heat. 10. Do not defeat the safety purpose of the grounding type plug. A grounding type plug has two blades
and a third grounding connector. The third connector is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. 11. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles. The AC mains plug or appliance coupler shall remain readily accessible for operation. 12. Only use accessories specified by KV2 Audio. 13. Install the product only with rigging specified by KV2 Audio, or sold with the loudspeaker. 14. Unplug this loudspeaker during lightning storms or when unused for long periods of time. 15. Refer all servicing to qualified service personnel. Servicing is required when the loudspeaker has been damaged in any way, such as when the power-supply cord or plug has been damaged; liquid has been spilled or objects have fallen into the loudspeaker; rain or moisture has entered the loudspeaker; the loudspeaker has been dropped; or when for undetermined reasons the loudspeaker does not operate normally. 16. Do not remove front or back panels. Removal of the panel will expose hazardous voltages. There are no user serviceable parts inside and removable may void the warranty. 17. An experienced user shall always supervise this professional audio equipment.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE PANELS. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
WARNING: To prevent fire or electric shock, do not expose this equipment to rain or moisture.
SAFETY SUMMARY To reduce the risk of electric shock, disconnect the loudspeaker from the AC mains before installing audio cable. Reconnect the power cord only after making all signal connections. Connect the loudspeaker to a twopole, three- wire grounding mains receptacle. The receptacle must be connected to a fuse or circuit breaker. Connection to any other type of receptacle poses a shock hazard and may violate local electrical codes. Do not allow water or any foreign object to get inside the loudspeaker. Do not put objects containing liquid on or near the unit. To reduce the risk of overheating the loudspeaker, avoid exposing it to direct sunlight. Do not install the unit near heat-emitting appliances, such as a room heater or stove. This loudspeaker contains potentially hazardous voltages. Do not attempt to disassemble the unit. The unit contains no user serviceable parts, repairs should be performed only by factory trained service personnel.

EX6

· Overview

EX6 – part number KVV 987 139 (230V) KVV 987 138 (115V)

Application
Specifically designed for reproduction of recorded music in near field applications · Suitable in Fixed installations as full range stand-alone or with
subwoofers · Excellent peripheral re-enforcement for main KV2 systems · Portable PA for Multi-Media applications · Compact floor monitoring solutions · Domestic and Professional studio monitoring
Introduction
The EX6 is a 2-way high output, active, compact, full-range speaker system. Design objectives for the EX6 were focused on the expansion of KV2 Audio’s primary philosophy of speakers systems with increased dynamic range, very high output and a consistent sound character no matter what the output level. The EX6 sets new levels of performance for compact cabinets achieved through the integration of new amplifier, transducer and electronic control technologies that are closely tied to a passion for taking performance to the next level.
Electronics
Amplifier power, electronic crossovers, phase alignment, equalisation and speaker protection are integrated into the EX6’s amplifier module.
The EX6’s high frequency compression driver is powered and controlled by KV2 Audio’s standard low intermodulation distortion, Class A/B, push-pull circuitry, designed to produce the lowest intermodulation distortion possible and the highest audio quality in the critical mid and high operating bands.
An improved version of KV2 Audio’s current enhancing, Bass driver switching amplifier has been developed for the EX6. The new configuration improves overall system efficiency and increases output, allowing passive radiation of heat to take place through a unique “fin-less” heat sink that can be placed in any position or direction. Additionally, the EX6 amplifier unit contains an internally located electric fan that is operated by a temperature sensing circuit which will slowly bring the fan online as required.

EX6 · Overview

4

EX6 · Overview
Acoustic Components
KV2 Audio has developed a revolutionary woofer technology called Trans-CoilTM. The woofer has two coils, a standard voice coilassembly and a second coil placed directly onthe neodymium magnetic circuit’s pole piece.This technology eliminates voice coil inductance resulting in a flat impedance response above the resonance point and achieves faster transient response through increased force and control of the moving mass. It also linearises acoustic and electrical phase response, reduces harmonic distortion and increases power transfer and transducer speed. Through this technology, the speaker now behaves like both a woofer at lower frequencies and like a mid-range at higher frequencies allowing a seamless transition to take place at the crossover frequency. The EX6’s patent pending NVPD neodymium compression driver is loaded on a constant directivity horn designed for smooth, wide dispersion performance. More importantly, it has also been designed to precisely match the power response of the woofer at the crossover frequency, a crucial design objective that ensures smooth transition and minimizes anomalies. The EX6 horn design is based on constant- directivity geometry with an emphasis on generating very low air distortion artifacts, maintaining low transducer compression ratios, high output and wide dispersion (100° x 100°). The horn is an injected molded aluminium part that functions as a heat dissipater for the compression driver’s neodymium magnetic motor structure.
Enclosure Design
The EX6 is a very compact, asymmetrical geometry enclosure design allowing it to be used in a variety of applications. A specially moulded aluminium handle was designed and fitted to the top of the cabinet. It functions as the principle pick up handle as well as providing several fixed installation and hanging solutions. It has a centrally located M10 hang point as well as four additional M6 bracket points found underneath the KV2 logo. The handle’s M10 point is used alongside asimilar M10 point on the bottom of the box when utilising an EX6 Horizontal Bracket. Four principal mounting bolts also provide an OmnimountTM bracket point. There are two side-mounted M10 hang points that can be used with the EX6 Vertical Bracket or eyebolts. The optional Pole mount adaptor sits over the two lugs on the rear of the cabinet and slides upwards-locking into place and supporting the bottom and rear of the cabinet.
5

EX6 · Overview

EX6 · AC Power Requirements
AC Power
The EX6 uses a PowerCon 3-pole AC main system with locking connectors to prevent accidental disconnection. The main AC connector (blue) serves as the power input. The EX6 operates in either 115V or 230V modes. Althoug pre- configured at the factory, the unit’s operating voltage mode can bechanged in the field.
Voltage Requirements
The EX6 operates safely and without audio discontinuity if the AC voltage stays within the operating window of 100V-130V in 115V mode and 200V-250V when working in 230V mode, at 50 or 60Hz. If the On LED does not illuminate or the system does not respond to audio input, remove AC power immediately. Verify that the voltage is within the proper range. If the problem persists, please contact KV2 Audio or an authorized service center. If the voltage drops below the low boundary of its safe operating range, the loudspeaker will shut down if the voltage does not rise above the low boundary before storage circuits are depleted. How long the loudspeaker will continue to function during brownout depends on the amount of voltage drop and the audio source level during the drop. If the voltage increases above the upper boundary of the range, the power supply can be damaged. It is recommended that the voltage supply be within the rated voltage window. This ensures that AC voltage variations from the service entry -or peak voltage drops due to cable runs – do not cause the amplifier to cycle on and off or cause damage to the power supply. For best performance, the AC cable voltage drop should not exceed 10 volts, or 10 percentat 115 volts and 5 percent at 230 volts. Make sure that even with the AC voltage drop, the AC voltage always stays within recommended operating ranges. The minimum electrical service amperage required by an EX6 speaker system is the sum of each loudspeaker’s maximum continuous rms current. An additional 50 percent above that amperage is recommended to prevent peak voltage drops at the service entry.
The Power Connector
The EX6 requires a grounded outlet. It is very important that the loudspeaker AC supply be properly grounded in order to operate safely and properly. Use the PowerCon AC cable-wiring diagram overleaf to create inter-national or special-purpose power connectors:
Power connector assembly
6

EX6 · AC Power Requirements

EX6 · AC Power Requirements

Current Requirements
Each EX6 requires approximately 2.5 Amps max at 115V AC for proper operation. This allows up to six EX6’s to be powered from one 15 A breaker at 115V and up to twelve EX6’s at 230V.
The EX6 presents a dynamic load to the AC mains, which causes the amount of current to fluctuate depending on quiet or loud operating levels. Since different cables and circuit breakers heat up at varying rates, it is essential to understand the types of current ratings and how they correspond to circuit breaker and cable specifications.
The maximum long-term continuous current is the maximum rms current during a period of at least ten seconds. It is used to calculate the temperature rise in cables, in order to select a cable size and gauge that conforms to electrical code standards. It is also used to select the rating for slow- reacting thermal breakers.
The burst current is the maximum rms current during a period of approximately one second, used to select the rating of most magnetic breakers and to calculate the peak voltage drop in long AC cables according to the formula: V pk (drop) = I pk x R (cable total)
The ultimate short-term peak current is used to select the rating of fast reacting magnetic breakers. Use the table below as a guide when selecting cable gauge size and circuit breaker ratings for your operating voltage.

Current Draw Max Long Term Continuous Burst Current Short Term Peak

115V Mode 2.5 A rms 3.75 A rms 10 A peak

230V Mode 1.25 A rms 1.85 A rms 5 A peak

AC Cable Color Coding
If the colours referred to in the diagram don’t correspond to the terminals in your plug, use the following guidelines: Connect the blue wire to the terminal marked with a N or coloured black. Connect the brown wire to the terminal marked with a L or coloured red. Connect the green and yellow wire to the terminal marked with a E or coloured green or green and yellow.

EX6 · AC Power Requirements

Power cable color coding The EX6 requires a ground connection. Always use a grounded outlet and plug.
7

EX6 · Audio Signal

The EX6 Control Panel
The EX6 features an easy to use control panel featuring AC power in, audio input and output, level control, LED status light and a High Pass filter.

EX6 Rear panel

Audio Input and Output
The EX6 uses a balanced, female XLR connector for the audio input connector, and a male XLR connector to provide through output signal. The through output connector, wired in parallel to the audio input, will continue to provide the input signal if the EX6 is turned off. The audio input circuit presents a 20 k balanced input impedance to a three-pin XLR connector with the following connections:

Main input

Through output

Pin 1 – Ground Pin 2 – Signal (+) Pin 3 – Signal (-)

Case – Earth (AC) ground and chassis

Audio signal can be daisy-chained using the through output connector on the input panel. A single source can drive multiple EX6 speakers with a paralleled input loop. If you are driving multiple EX6’s make certain that the source device can drive the total load impedance presented by the paralleled input circuits.
The audio source must be capable of producing a minimum of 0 dB (0.775V volts rms) to produce the maximum peak SPL over the operating bandwidth of the loudspeaker. To avoid distortion from the source, make sure the source equipment provides an adequate drive circuit design for the total paralleled load impedance presented by the speakers. The input impedance for a single loudspeaker is 20 k. If “n” represents the number of EX6 loudspeakers in a system, paralleling the inputs of n loudspeakers will produce a balanced input load of 20 k divided by “n”.
If the loudspeaker produces noises such as hiss and popping, disconnect the audio cable from the loudspeaker, if the noise stops, then most likely the problem is not with the loudspeaker. Check the audio cable, source, and AC power for the source of the problem.

EX6 · Audio Signal

8

EX6 · Audio Signal
Ensure that all cabling carrying signal to multiple amplifiers and active speaker systems is wired correctly. Make sure that the polarity has not been reversed. Reversed polarity can cause severe degradation in frequency response and can also impact the dispersion characteristics of the speaker.
Power On / Signal LED
This LED turns green when the speaker is turned ON. The light will turn yellow when signal is present.
Low Cut Switch
The EX6 features a 90 Hz High Pass Filter. Pressing the button engages this filter allowing the speaker to reproduce frequencies only above 90Hz
Limiter
The EX6 employs a protection system based on rms limiting of the amplifiers. This type of protection strategy allows the speaker to operate safely under overload conditions. When the rms “limiter” engages, the output level of both amplifiers is reduced to a safe operating level. This type of protection allows the frequency response of the system to remain unchanged as the level is lowered. By not compressing or limiting peak signal, dynamics also remain unchanged. The control objective is to regulate the operating temperature of the transducers magnetic circuits long term. This ensures no impact on performance due to power compression and allows the components to retain their ability to reproduce high dynamics. When overdriven the rms limiter will disengage only if the input level is turned down.
Thermal protection
In the unlikely event of over heating the speaker system will shut down. You can expect for the system to be down for at least 2-3 minutes depending on the ambient temperature and whether the system is being exposed to direct sun light. The EX6 features a fin-less heatsink that allows it to operate in any position. There is also an internal fan located inside the amplifier module. The fan speed is dependent on two factors; the temperature of the heat sink and the output level of the speaker. As temperature increases, so does fan speed. As audio level increases, fan speed also increases as a preventative measure designed to keep the heat sink temperature low. Under normal operating conditions, the fan noise remains inaudible. Please contact KV2 Audio or a local service representative should the system enter a thermal condition under normal operating conditions.
Transportation
To keep your EX6 speakers in optimum condition we recommend transportation in an optional KV2 Audio EX6 padded nylon cover (EX6CVR) or a professional road case.
9

EX6 · Audio Signal

EX6 · Specifications
Specifications
System Acoustic Perfomance Max SPL Long-term Max SPL Peak -3dB Response -10dB Response Crossover Point
High Frequency Section High Horn Coverage Horizontal / Vertical Throat Exit Diameter / Diaphragm Size Diaphragm Material Magnet Type
High Frequency Amplifier Specification Type Rated Continuous Power Distortion Operating Bandwidth
Low Frequency Section Acoustic Design Woofer Size / Voice Coil Diameter / Design Diaphragm Material Magnet Type
Low Frequency Amplifier Specification Type Rated Continuous Power Distortion Operating Bandwidth
Signal Input Input Sensitivity Input Impedance
Power Power Connector Operating Voltage Range Recommended Amperage
Cabinet Cabinet Material Handles Pole Mount Color
Physical Dimensions Height Width Depth Weight

117dB 123dB 68Hz to 20kHz 62Hz to 28kHz 2.0kHz
100° x 100° 1″ / 1.75″ Nitride Titanium Neodymium
Class AB Push-Pull 20W <0.05% 2.0kHz to 28kHz
Front Loaded, Bass Reflex 6″ / 1.75″ / Trans Coil Epoxy Reinforced Cellulose Neodymium
High Efficiency Switching 180W <0.05% 62Hz to 2.0kHz
1V RMS 20 k
Neutrik PowerCon® 100 to 120V @ 60Hz | 230 to 250V @ 50Hz | 2.5A 115V | 1.25A 230V
Baltic birch 1 Optional – Stand Adapter EX6 “Orange peeled” Matt Black or any RAL
395 mm (15.55″) 220 mm (8.66″) 274 mm (10.78″) 12 kg (26.4lbs)

EX6 · Specifications

10

EX6 · Frequency characteristics
Frequency response

EX6 · Frequency characteristics

Horizontal Polarplots
73Hz – 250Hz

500Hz – 2kHz

4kHz – 16kHz

73Hz 125Hz 250Hz
Vertical Polarplots
73Hz – 250Hz

500Hz 1kHz 2kHz
500Hz – 2kHz

4kHz 8kHz 16kHz
4kHz – 16kHz

11

73Hz 125Hz 250Hz

500Hz 1kHz 2kHz

4kHz 8kHz 16kHz

EX6 · Using Multiple Boxes
Using Multiple Boxes

Fig. A

Best quality

Poor quality reduced output

Good quality where 2 cabinets must be used

Poor quality reduced output

minimum
100°
Good quality with 200° coverage

Fig. B

Fig. C

KV2 speakers are far more accurate, defined and phase coherent than virtually any other loudspeaker on the market. This very defined phase accuracy comes into play when trying to stack the speakers. It is very important not to use KV2 Audio Mid-High boxes directly side by side. (Fig. A) This will produce a poor quality sound cancelling out perfectly, which reduces overall output. Defined by the way our ears work, their position on our heads and the brain’s understanding of the signals they produce, each ear will hear two sources in the horizontal plane very close together, but very slightly misaligned in arrival time. With our ears positioned on each side of our head, rather than on the top and bottom, they are very good at pinpointing precisely a sound in the Horizontal plane (i.e. it’s exact position left to right in the sound field). Vertically (trying to pin point sound up and down) they are far less accurate and have a greater tolerance for error. Recieving multiple signals so phase coherent, but misaligned horizontally, leads the brain to get confused, which in turn leads it to interpret a confused poor quality, low intelligibility sound. KV2 exploits the additional vertical tolerance that the brain has by only stacking multiple cabinets vertically, as do modern Line arrays, but KV2 still keeps as close as possible to the theory of point source by using a maximum of two cabinets together, keeping the horns as far apart as possible. (Fig. B) This reduces the cancellations that most line arrays suffer from particularly in the high frequencies. The only exception to this maximum of two cabinets would be in a down fill / side fill application where an additional cabinet can be deployed but must be separated from the main forward firing system by an amount of degrees equivalent to the vertical or horizontal dispersion of that speaker. (Fig. C) Combining boxes and building systems in this way will give the maximum overall output, best audio quality and consistent, even coverage.

EX6 · Using Multiple Boxes

12

EX6 · Drawings
Drawings
13

EX6 · Drawings

EX26

· Overview

EX26 – part number KVV 987 164 (230V) KVV 987 165 (115V)

Application
Purposely designed as a stand-alone unit for extremely high quality vocal reproduction and output
· Church and houses of worship · Conference and presentations · Front of stage and balcony infill · Full range portable PA when used with subwoofers for larger
Multi-Media applications and small live music applications

Introduction
The EX26 is a 2-way high output, active, compact, Vocal speaker system. Design objectives for the EX26 were focused on the expansion of KV2 Audio’s primary philosophy of speakers systems with increased dynamic range, very high output and a consistent sound character no matter what the output level. The EX26 sets new levels of performance for compact cabinets achieved through the integration of new amplifier, transducer and electronic control technologies that are closely tied to a passion for taking performance to the next level.
Electronics
Amplifier power, electronic crossovers, phase alignment, equalisation and speaker protection are integrated into the EX26’s amplifier module.
The EX26’s high frequency compression driver is powered and controlled by KV2 Audio’s standard low intermodulation distortion, Class A/B, push-pull circuitry, designed to produce the lowest intermodulation distortion possible and the highest audio quality in the critical mid and high operating bands.
An improved version of KV2 Audio’s current enhancing, bass driver switching amplifier has been developed for the EX26. The new configuration improves overall system efficiency and increases output allowing passive radiation of heat to take place through a unique “finless” heat sink that can be placed in any position or direction. Additionally, the EX26 amplifier unit contains an internally located electric fan that is operated by a temperature sensing circuit which will slowly bring the fan online as required.

EX26 · Overview

14

EX26 · Overview
Acoustic Components
The EX26’s patent pending NVPD neodymium compression driver is loaded on a constant directivity horn designed for smooth, wide dispersion performance. More importantly, it has also been designed to precisely match the power response of the woofers at the crossover frequency, a crucial design objective that ensures smooth transition and minimizes anomalies. The EX26 horn design is based on constantdirectivity geometry with an emphasis on generating very low air distortion artifacts, maintaining low transducer compression ratios, high output and wide dispersion (100° x 100°). The horn is an injected molded aluminium part that functions as a heat dissipater for the compression driver’s neodymium magnetic motor structure.
Enclosure Design
The EX26 is a very compact, asymmetrical geometry enclosure design allowing it to be used in a variety of applications. A specially moulded aluminium handle was designed and fitted to the top of the cabinet. It functions as the principle pick up handle as well as providing several fixed installation and hanging solutions. It has a centrally located M10 hang point as well as four additional M6 bracket points found underneath the KV2 logo.
15

EX26 · Overview

EX26 · AC Power Requirements
AC Power Requirements
The EX26 is an advanced self-powered loudspeaker with on-board amplification and control systems. Understanding power distribution, voltage and current requirements, as well as electrical safety issues, is critical to the safe operation of the EX26.
AC Power
The EX26 uses a PowerCon 3-pole AC main system with locking connectors to prevent accidental disconnection. The main AC connector (blue) serves as the power input.
The EX26 operates in either 115V or 230V modes. Although pre-configured at the factory, the unit’s operating voltage mode can be changed in the field.
Voltage Requirements
The EX26 operates safely and without audio discontinuity if the AC voltage stays within the operating window of 100V-130V in 115V mode and 200V-250V when working in 230V mode, at 50 or 60Hz.
If the On LED does not illuminate or the system does not respond to audio input, remove AC power immediately. Verify that the voltage is within the proper range. If the problem persists, please contact KV2 Audio or an authorized service center.
If the voltage drops below the low boundary of its safe operating range, the loudspeaker will shut down if the voltage does not rise above the low boundary before storage circuits are depleted. How long the loudspeaker will continue to function during brownout depends on the amount of voltage drop and the audio source level during the drop. If the voltage increases above the upper boundary of the range, the power supply can be damaged.
It is recommended that the voltage supply be within the rated voltage window. This ensures that AC voltage variations from the service entry – or peak voltage drops due to cable runs – do not cause the amplifier to cycle on and off or cause damage to the power supply.
For best performance, the AC cable voltage drop should not exceed 10 volts, or 10 percent at 115 volts and 5 percent at 230 volts.
Make sure that even with the AC voltage drop, the AC voltage always stays within recommended operating ranges. The minimum electrical service amperage required by an EX26 speaker system is the sum of each loudspeaker’s maximum continuous rms current. An additional 50 percent above that amperage is recommended to prevent peak voltage drops at the service entry.
The Power Connector
The EX26 requires a grounded outlet. It is very important that the loudspeaker AC supply be properly grounded in order to operate safely and properly. Use the PowerCon AC cable wiring diagram overleaf to create international or special-purpose power connectors:
Power connector assembly
16

EX26 · AC Power Requirements

EX26 · AC Power Requirements

Current Requirements
Each EX26 requires approximately 4 Amps max at 115V AC for proper operation. This allows up to three EX26’s to be powered fromn one 15 A breaker at 115V and up to seven EX26’s at 230V.
The EX26 presents a dynamic load to the AC mains, which causes the amount of current to fluctuate depending on quiet or loud operating levels. Since different cables and circuit breakers heat up at varying rates, it is essential to understand the types of current ratings and how they correspond to circuit breaker and cable specifications.
The maximum long-term continuous current is the maximum rms current during a period of at least ten seconds. It is used to calculate the temperature rise in cables, in order to select a cable size and gauge that conforms to electrical code standards. It is also used to select the rating for slow- reacting thermal breakers.
The burst current is the maximum rms current during a period of approximately one second, used to select the rating of most magnetic breakers and to calculate the peak voltage drop in long AC cables according to the formula: V pk (drop)= I pk x R (cable total)
The ultimate short-term peak current is used to select the rating of fast reacting magnetic breakers. Use the table below as a guide when selecting cable gauge size and circuit breaker ratings for your operating voltage.

Current Draw Max Long Term Continuous Burst Current Short Term Peak

115V Mode 4 A rms 6 A rms 16 A peak

230V Mode 2 A rms 4 A rms 8 A peak

AC Cable Color Coding
If the colours referred to in the diagram don’t correspond to the terminals in your plug, use the following guidelines: Connect the blue wire to the terminal marked with a N or coloured black. Connect the brown wire to the terminal marked with a L or coloured red. Connect the green and yellow wire to the terminal marked with a E or coloured green or green and yellow.

EX26 · AC Power Requirements

Power cable color coding The EX26 requires a ground connection. Always use a grounded outlet and plug.
17

EX26 · Audio Signal
The EX26 Control Panel
The EX26 features an easy to use control panel featuring AC power in, audio input and through output, level control, LED status light and a High Pass filter.

EX26 Rear panel

Audio Input and Output
The EX26 uses a balanced, female XLR connector for the audio input connector, and a male XLR connector to provide through output signal. The through output connector, wired in parallel to the audio input, will continue to provide the input signal if the EX26 is turned off. The audio input circuit presents a 20 k balanced input impedance to a three-pin XLR connector with the following connections:

Main input

Through output

Pin 1 – Ground Pin 2 – Signal (+) Pin 3 – Signal (-)

Case – Earth (AC) ground and chassis

Audio signal can be daisy-chained using the through output connector on the input panel. A single source can drive multiple EX26 speakers with a paralleled input loop. If you are driving multiple EX26’s make certain that the source device can drive the total load impedance presented by the paralleled input circuits.
The audio source must be capable of producing a minimum of 1.0V volts rms to produce the maximum peak SPL over the operating bandwidth of the loudspeaker. To avoid distortion from the source, make sure the source equipment provides an adequate drive circuit design for the total paralleled load impedance presented by the speakers. The input impedance for a single loudspeaker is 20 k. If “n” represents the number of EX26 loudspeakers in a system, paralleling the inputs of n loudspeakers will produce a balanced input load of 20 k divided by “n”.
If the loudspeaker produces noises such as hiss and popping, disconnect the audio cable from the loudspeaker, if the noise stops, then most likely the problem is not with the loudspeaker. Check the audio cable, source, and AC power for the source of the problem.
Ensure that all cabling carrying signal to multiple amplifiers and active speaker systems is wired correctly. Make sure that the polarity has not been reversed. Reversed polarity can cause severe degradation in frequency response and can also impact the dispersion characteristics of the speaker.

Important information!
Please be aware and notified that this product ­ EX26 with a designated P’ Serial Number onwards now comes with a modified Polarity that will appear reversed when compared to older existing versions of this model ­ EX26. This has been done to ensure that when used with other EX models within the range, there will not be any difference in polarity response between models. If you have existing EX26 models with a Serial Number that has a letter preface prior to theP’ designation, applying a simple reversed XLR connector input lead crossing pins 2 &3 at one side will correct this when in use.

EX26 · Audio Signal

18

EX26 · Audio Signal
Power On / Signal LED
This LED turns green when the speaker is turned ON. The light will turn yellow when signal is present.
Low Cut Switch
The EX26 features a 90Hz High Pass Filter. Pressing the button engages this filter allowing the speaker to reproduce frequencies only above 90Hz.
Limiter
The EX26 employs a protection system based on rms limiting of the amplifiers. This type of protection strategy allows the speaker to operate safely under overload conditions. When the rms “limiter” engages, the output level of both amplifiers is reduced to a safe operating level. This type of protection allows the frequency response of the system to remain unchanged as the level is lowered. By not compressing or limiting peak signal, dynamics also remain unchanged. The control objective is to regulate the operating temperature of the transducers magnetic circuits long term. This ensures no impact on performance due to power compression and allows the components to retain their ability to reproduce high dynamics. When overdriven the rms limiter will disengage only if the input level is turned down.
Thermal Protection
In the unlikely event of over heating the speaker system will shut down. You can expect for the system to be down for at least 2-3 minutes depending on the ambient temperature and whether the system is being exposed to direct sun light. The EX26 features a fin-less heatsink that allows it to operate in any position. There is also an internal fan located inside the amplifier module. The fan speed is dependent on two factors; the temperature of the heat sink and the output level of the speaker. As temperature increases, so does fan speed. As audio level increases, fan speed also increases as a preventative measure designed to keep the heat sink temperature low. Under normal operating conditions, the fan noise remains inaudible. Please contact KV2 Audio or a local service representative should the system enter a thermal condition under normal operating conditions.
Transportation
To keep your EX26 speakers in optimum condition we recommend transportation in an optional KV2 Audio EX26 padded nylon cover (EX26CVR) or a professional road case.
19

EX26 · Audio Signal

EX26 · Specifications

Specifications
System Acoustic Perfomance Max SPL Long-term Max SPL Peak -3dB Response -10dB Response Crossover Point
High Frequency Section Acoustic Design High Horn Coverage Horizontal / Vertical Throat Exit Diameter / Diaphragm Size Diaphragm Material Magnet Type
High Frequency Amplifier Specification Type Rated Continuous Power Distortion Operating Bandwidth
Low Frequency Section Acoustic Design Woofer Size / Voice Coil Diameter Magnet Type Diaphragm Material
Low Frequency Amplifier Specification Type Rated Continuous Power Distortion Operating Bandwidth
Signal Input Input Sensitivity Input Impedance
Power Power Connector Operating Voltage Range Recommended Amperage
Cabinet Cabinet Material Handles Pole Mount Color
Physical Dimensions Height Width Depth Weight

124dB 130dB 80Hz to 20kHz 65Hz to 28kHz 2.5kHz
Horn Loaded 100° x 100° 1″ / 1.75″ Nitride Titanium Neodymium
Class AB Push-Pull 20W <0.05% 2.5kHz to 28kHz
Front Loaded, Bass Reflex 6″ / 1.75″ Neodymium Epoxy Reinforced Cellulose
High efficiency, Current-enhancing switch mode 350W <0.05% 68Hz to 2.5kHz
1.0V RMS 20 k
Neutrik PowerCon® 100 to 120V @ 60Hz | 230 to 250V @ 50Hz 3.15A 115V | 1.6A 230V
Baltic birch 1 35 mm “Orange peeled” Matt Black or any RAL
570 mm (22.44″) 220 mm (8.66″) 274 mm (10.78″) 16 kg (35.2lbs)
20

EX26 · Specifications

EX26 · Frequency characteristics
Frequency response

EX26 · Frequency characteristics

Horizontal Polarplots
73Hz – 250Hz

500Hz – 2kHz

4kHz – 16kHz

73Hz 125Hz 250Hz
Vertical Polarplots
73Hz – 250Hz

500Hz 1kHz 2kHz
500Hz – 2kHz

4kHz 8kHz 16kHz
4kHz – 16kHz

21

73Hz 125Hz 250Hz

500Hz 1kHz 2kHz

4kHz 8kHz 16kHz

EX26 · Using Multiple Boxes

Using Multiple Boxes
Best quality

Poor quality reduced output

Fig. B

Fig. A

Where 2 cabinets must be used

EX26 · Using Multiple Boxes

Fig. C

minimum
100°
Good quality whit 200° coverage

Poor quality reduced output

KV2 speakers are far more accurate, defined and phase coherent than virtually any other loudspeaker on the market. This very defined phase accuracy comes into play when trying to stack the speakers. It is very important not to use KV2 Audio Mid-High boxes directly side by side. (Fig. A) This will produce a poor quality sound cancelling out perfectly, which reduces overall output. Defined by the way our ears work, their position on our heads and the brain’s understanding of the signals they produce, each ear will hear two sources in the horizontal plane very close together, but very slightly misaligned in arrival time. With our ears positioned on each side of our head, rather than on the top and bottom, they are very good at pinpointing precisely a sound in the Horizontal plane (i.e. it’s exact position left to right in the sound field). Vertically (trying to pin point sound up and down) they are far less accurate and have a greater tolerance for error. Recieving multiple signals so phase coherent, but misaligned horizontally, leads the brain to get confused, which in turn leads it to interpret a confused poor quality, low intelligibility sound. KV2 exploits the additional vertical tolerance that the brain has by only stacking multiple cabinets vertically, as do modern Line arrays, but KV2 still keeps as close as possible to the theory of point source by using a maximum of two cabinets together, keeping the horns as far apart as possible. (Fig. B) This reduces the cancellations that most line arrays suffer from particularly in the high frequencies. The only exception to this maximum of two cabinets would be in a down fill / side fill application where an additional cabinet can be deployed but must be separated from the main forward firing system by an amount of degrees equivalent to the vertical or horizontal dispersion of that speaker. (Fig. C ) Combining boxes and building systems in this way will give the maximum overall output, best audio quality and consistent, even coverage.

22

EX26 · Drawings
Drawings
23

EX26 · Drawings

EX10 · Overview

EX10 – part number KVV 987 097 (250V) KVV 987 011 (230V) KVV 987 012 (115V)

Application
Specifically designed for high quality, high output multi-tasking, portable music playback and live performance in small applications
· Full range stand-alone solution or scalable to larger capabilities with subwoofers for large conference, meetings and small to medium performance venues
· Multi-purpose fixed installations · Personal monitoring · Infill for larger main KV2 Audio systems

EX10

· Overview

Introduction
The EX10 is a 2-way high output, active, compact, full-range speaker system. Design objectives for the EX10 were focused on the expansion of KV2 Audio’s primary philosophy of speakers systems with increased dynamic range, very high output and a consistent sound character no matter what the output level. The EX10 sets new levels of performance for compact cabinets achieved through the integration of new amplifier, transducer and electronic control technologies that are closely tied to a passion for taking performance to the next level.
Electronics
Amplifier power, electronic crossovers, phase alignment, equalization, time correction and speaker protection are integrated into the EX10’s amplifier module. On-board electronics ensures fast, easy set up and complete control. An improved version of KV2 Audio’s switch mode, current enhancing low frequency amplifier has been developed for the EX10. The new configuration improves overall system efficiency and increases output, allowing passive radiation of heat to take place through a unique “fin-less” heat sink that can be placed in any position or direction. This ensures cool operation in horizontal or vertical applications. Additionally, the EX10 amplifier unit contains an internally located electric fan that is operated by a temperature sensing circuit which will slowly bring the fan online as required in extreme, high temperature situations.
Months of research were invested into designing circuitry that ensures that the extreme dynamic range exemplified by the speaker system is maintained even under clipping conditions. The real test of the EX10’s limits is when it is exposed to the rigors and demands of live audio playback where consistent clipping of amplifiers, generation of distortion artifacts, dramatic increases in the floor and the elimination of dynamic range put the product to an extreme test.
The EX10’s high frequency compression driver is powered and controlled by KV2 Audio’s standard low intermodulation distortion, Class A/B, push-pull circuitry, high and mid frequency amplifier design. Metal Oxide Silicon Field Effect Transistors (MOSFET) are used for the output stage and the compression driver coupled through a transformer balanced speaker output. The entire performance strategy for this type of design is based on producing the lowest intermodulation distortion possible and the highest audio quality in the critical mid and high operating bands.
24

EX10 · Overview
Acoustic Components
KV2 Audio has developed a revolutionary woofer technology called Trans-CoilTM. The woofer has two coils, a standard voice coil assembly and a second coil placed directly on the neodymium magnetic circuit’s pole piece. This technology eliminates voice coil inductance resulting in a flat impedance response above the resonance point and achieves faster transient response through increased force and control of the moving mass. It also linearises acoustic and electrical phase response, reduces harmonic distortion and increases power transfer and transducer speed. Through this technology, the speaker now behaves like both a woofer at lower frequencies and like a mid- range at higher frequencies allowing a seamless transition to take place at the crossover frequency. The EX10’s patent pending neodymium compression driver is loaded on a constant directivity horn designed for smooth, wide dispersion performance. More importantly, it has also been designed to precisely match the power response of the woofer at the crossover frequency, a crucial design objective that ensures smooth transition and minimizes anomalies. The compression driver is a new, patent pending 1.75- inch titanium diaphragm design, featuring a complex geometry phase plug that dramatically lowers distortion, eliminates ring modes and provides clearer, ripple free performance. The EX10 horn was designed with two primary performance goals. The mechanical design allows the horn to be rotated 90 degrees, allowing for complete flexibility in selection of vertical and horizontal system set up. The horn design is based on constant- directivity geometry with an emphasis on generating very low air distortion artifacts, maintaining low transducer compression ratios, high output and wide dispersion (100 x 80). The horn is an injected molded aluminum part that functions as a heat dissipater for the compression driver’s neodymium magnetic motor structure.
Enclosure Design
The EX10 is a very compact, asymmetrical geometry enclosure design allowing it to be used in a variety of applications and featuring a number of ergonomically designed components that make it lightweight and easy to use. An extensive set of professional hardware features enables the EX10 to be used in a variety of environments using an array of industry standard hardware. These facilitate both portable and fixed installations with a maximum amount of mounting flexibility. A specially molded aluminum top handle was designed and fitted to the top of the cabinet. It functions as the principle pick up handle as well as providing several fixed installation and hanging solutions. It has a centrally located M10 hang point as well as four additional M6 bracket points. The handles four principal mounting bolts also provide an OmnimountTM bracket point. There are two side-mounted M10 hang points that can be used with brackets or eyebolts.
25

EX10 · Overview

EX10 · AC Power Requirements
AC Power
The EX10 uses a PowerCon 3-pole AC main system with locking connectors to prevent accidental disconnection. The main AC connector (blue) serves as the power input. The EX10 operates in either 115V, 230V or 250V modes. Although pre-configured at the factory, the unit’s operating voltage mode can be changed in the field.
Voltage Requirements
The EX10 operates safely and without audio discontinuity if the AC voltage stays within the operating window of 100V-120V in 115V mode, 205V-240V in 230V mode and 225V-260V when working in 250V mode, at 50 or 60Hz. If the On LED does not illuminate or the system does not respond to audio input, remove AC power immediately. Verify that the voltage is within the proper range. If the problem persists, please contact KV2 Audio or an authorized service center. If the voltage drops below the low boundary of its safe operating range, the loudspeaker will shut down if the voltage does not rise above the low boundary before storage circuits are depleted. How long the loudspeaker will continue to function during brownout depends on the amount of voltage drop and the audio source level during the drop. If the voltage increases above the upper boundary of the range, the power supply can be damaged. It is recommended that the voltage supply be within the rated voltage window. This ensures that AC voltage variations from the service entry- or peak voltage drops due to cable runs do not cause the amplifier to cycle on and off or cause damage to the power supply. For best performance, the AC cable voltage drop should not exceed 10 volts, or 10 percent at 115 volts and 5 percent at 230 volts. Make sure that even with the AC voltage drop, the AC voltage always stays within recommended operating ranges. The minimum electrical service amperage required by a EX10 speaker system is the sum of each loudspeaker’s maximum continuous rms current. An additional 50 percent above the minimum amperage is recommended to prevent peak volt-age drops at the service entry.
The Power Connector
The EX10 requires a grounded outlet. It is very important that the loudspeaker AC supply be properly grounded in order to operate safely and properly. Use the PowerCon AC cable-wiring diagram on page 27 to create international or special-purpose power connectors:
Power connector assembly
26

EX10 · AC Power Requirements

EX10 · AC Power Requirements

Current Requirements
Each EX10 requires approximately 5 Amps max at 115V AC for proper operation. This allows up to three EX10’s to be powered from one 15 A breaker at 115V and up to 6 loudspeakers at 230V or 250V.
The EX10 presents a dynamic load to the AC mains, which causes the amount of current to fluctuate depending on quiet or loud operating levels. Since different cables and circuit breakers heat up at varying rates, it is essential to understand the types of current ratings and how they correspond to circuit breaker and cable specifications.
The maximum long-term continuous current is the maximum rms current during a period of at least ten seconds. It is used to calculate the temperature rise in cables, in order to select a cable size and gauge that conforms to electrical code standards. It is also used to select the rating for slow- reacting thermal breakers.
The burst current is the maximum rms current during a period of approximately one second, used to select the rating of most magnetic breakers and to calculate the peak voltage drop in long AC cables according to the formula: V pk (drop)= I pk x R (cable total)
The ultimate short-term peak current is used to select the rating of fast reacting magnetic breakers. Use the table below as a guide when selecting cable gauge size and circuit breaker ratings for your operating voltage.

Current Draw Max Long Term Continuous Burst Current Short Term Peak

115V Mode 5 A rms 7.5 A rms 20 A peak

230V, 250V 2.5 A rms 5 A rms 10 A peak

AC Cable Color Coding
If the colors referred to in the diagram don’t correspond to the terminals in your plug, use the following guidelines: Connect the blue wire to the terminal marked with a N or colored black. Connect the brown wire to the terminal marked with a L or colored red. Connect the green and yellow wire to the terminal marked with a E or colored green or green and yellow.

EX10 · AC Power Requirements

Power cable color coding The EX10 requires a ground connection. Always use a grounded outlet and plug.
27

EX10 · Audio Signal
The EX10 Control Panel
The EX10 features an easy to use rear control panel with audio input and output, level control, LED status lights and a low pass filter that can be engaged when the loudspeaker is used as a stage monitoring device.

EX10 · Audio Signal

EX10 Rear panel

Audio Input and Output
The EX10 uses a balanced, female XLR connector for the audio input connector, and a male XLR connector to provide through output signal. The through output connector, wired in parallel to the audio input, will continue to provide the input signal if the EX10 is turned off. The audio input circuit presents a 20 kOhm balanced input impedance to a three-pin XLR connector with the following connectors:

Main input

Through output

Pin 1 – Ground Pin 2 – Signal (+) Pin 3 – Signal (-)

Case – Earth (AC) ground and chassis

Audio signal can be daisy-chained using the through output connector on the input panel. A single source can drive multiple EX10 speakers with a paralleled input loop. If you are driving multiple EX10’s in an ar ray, make certain that the source device can drive the total load impedance presented by the paralleled input circuit of the array. The audio source must be capable of producing a minimum of 20 dB volts (10 volts rms into 600 ohms) to produce the maximum peak SPL over the operating bandwidth of the loudspeaker. To avoid distortion from the source, make sure the source equipment provides an adequate drive circuit design for the total paralleled load impedance presented by the array. The input impedance for a single loudspeaker is 20 kOhms. If “n” represents the number of EX10 loudspeakers in a system, paralleling the inputs of n loudspeakers will produce a balanced input load of 20 kOhms divided by “n”.
Most source equipment is safe for driving loads no smaller than 10 times the source’s output impedance. For example, cascading an array of 10 units consisting of EX10 speak – ers produces an input impedance of 2000 ohms (20kOhms divided by 10). The source equipment should have an output impedance of 200 Ohms or less. This is also true when connecting EX10’s in parallel (loop out) with other KV2 Audio amplifiers and active speakers and subwoofers.
If the loudspeaker produces noises such as hiss and popping, disconnect the audio cable from the loudspeaker, if the noise stops, then most likely the problem is not with the loudspeaker. Check the audio cable, source, and AC power for the source of the problem.
Ensure that all cabling carrying signal to multiple amplifiers and active speaker systems is wired correctly. Make sure that the polarity has not been reversed. Reversed polarity can cause severe degradation in frequency response and can also impact the dispersion characteristics of the speaker.

28

EX10 · Audio Signal
Amplifiers and Acoustic Filters
The EX10 is powered by two separate power amplifiers specifically designed and optimized for the low frequency and high frequency drivers. The control system in the EX10 processes the audio signal through a series of electronic filters and circuits providing equalization, crossover filters, phase adjustment, thermal and overdrive protection.
The EX10 employs a protection system based on rms limiting of the amplifiers. This type of protection strategy allows the speaker to operate safely under overload conditions. When the rms “limiter” engages, the output level of both amplifiers is reduced to a safe operating level. This type of protection allows the phase response of the system to remain unchanged as the level is lowered. By not compressing or limiting peak signal, dynamics also remain unchanged. The control objective is to regulate the operating temperature of the transducers magnetic circuits log term. This ensures no impact on performance due to power compression and allows the components to retain their ability to reproduce high dynamics.
LED Status Lights
The EX10 control panel uses two distinct LED’s to provide operating status information.
Power On / Limiter LED
This LED turns green when the speaker is turned ON. The light will continue to be green during normal operation of the speaker system. Should the rms limiting system be engaged due to overdriving of the EX10, the LED will change color from green to yellow. The audible effect of the rms limiter is a lowering of overall output level. The rms limiter will disengage only if the input level is turned down..
Signal / Thermal LED
This LED turns green when there is audio signal present in the EX10. This signal indicator can be used to troubleshoot wiring problems. The LED will change from green to yellow under a thermal condition resulting from overheating of the amplifier system. Under this condition, the speaker system will shut down. You can expect for the system to be down for at least 2-3 minutes depending the ambient temperature and whether the system is being exposed to direct sun light.
The EX10 features a finless heatsink that allows it to operate in any position. There is also an internal fan located inside the amplifier module. The fan speed is dependent on two factors; the temperature of the heat sink and the output level of the speaker. As temperature increases, so does fan speed. As audio level increases, fan speed also increases as a preventative measure designed to keep the heat sink temperature low. Under normal operating conditions, the fan noise remains inaudible. Please contact KV2 Audio or a local service representative should the system enter a thermal condition under normal operating conditions.
Stage Monitor Filter
The EX10 features a 90 Hz Monitor Filter control. Depressing the button engages a low pass audio filter allowing the speaker to be effectively used to reproduce frequencies above 90Hz. When using EX10 as a stage monitor, the horn should be rotated 90º.
29

EX10 · Audio Signal

EX10 · Specifications
Specifications
System Acoustic Perfomance Max SPL Long-term Max SPL Peak -3dB Response -10dB Response Crossover Point
High Frequency Section Acoustic Design High Horn Coverage Horizontal / Vertical Rotatable Horn Throat Exit Diameter / Diaphragm Size Diaphragm Material Magnet Type
High Frequency Amplifier Specification Type Rated Continuous Power Distortion Operating Bandwidth
Low Frequency Section Acoustic Design Woofer Size / Voice Coil Diameter / Design Diaphragm Material Magnet Type
Low Frequency Amplifier Specification Type Rated Continuous Power Distortion Operating Bandwidth
Signal Input Input Sensitivity Input Impedance
Power Power Connector Operating Voltage Range Recommended Amperage
Cabinet Cabinet Material Handles Pole Mount Color
Physical Dimensions Height Width Depth Weight

126dB 132dB 68Hz to 20kHz 55Hz to 28kHz 1.6kHz
Horn Loaded 100° x 80° YES 1″ / 1.75″ Titanium Neodymium
Class AB Push-Pull 50W <0.05% 1.6kHz to 28kHz
Front Loaded, Bass Reflex 10″ / 2.5″ / Trans Coil Epoxy Reinforced Cellulose Neodymium
High efficiency, Current-enhancing switch mode 450W <0.05% 55Hz to 1.6kHz
0.775V RMS 20 k
Neutrik PowerCon® 100 to 120V@60Hz | 205 to 240V@50Hz | 225 to 260V@50Hz 6A 115V | 3A 230V | 3A 250V
Baltic birch 1 35 mm “Orange peeled” Matt Black or any RAL
514 mm (20.23″) 310 mm (12.20″) 326 mm (12.83″) 22 kg (48.4lbs)
30

EX10 · Specifications

EX10 · Frequency characteristics
Frequency response

EX10 · Frequency characteristics

Horizontal Polarplots
73Hz – 250Hz

500Hz – 2kHz

4kHz – 16kHz

73Hz 125Hz 250Hz
Vertical Polarplots
73Hz – 250Hz

500Hz 1kHz 2kHz
500Hz – 2kHz

4kHz 8kHz 16kHz
4kHz – 16kHz

31

73Hz 125Hz 250Hz

500Hz 1kHz 2kHz

4kHz 8kHz 16kHz

EX10 · Drawings
Drawings
32

EX10 · Drawings

EX28

· Overview

EX28 – part number KVV 987 462 (250V) KVV 987 461 (230V) KVV 987 460 (115V)

Application
Purposely designed as a stand-alone unit for extremely high quality vocal reproduction and output
· Theatres, Churches and houses of worship · Conference and presentations · Front of stage and balcony infill · Full range portable PA when used with subwoofers for larger
Multi-Media applications and small live music applications

Introduction
The EX28 is a 2.5-way full-range active loudspeaker system that builds on the success of the EX26 whilst adding further low frequency extension. Its compact profile makes it ideal for a multitude of FOH and infill applications in Theatres, Leisure venues, Houses of Worship and Concert Halls, where the ultimate quality from a discreet loudspeaker solution is required. Two individually designed 8″ neodymium mid – bass woofers are utilised for extended low frequency performance, whilst one unit incorporates KV2 Audio SLA Transcoil technology for improved vocal performance, along with a neodymium compression driver mounted on a 100° by 80° horn.
Electronics
Amplifier power, electronic crossovers, phase alignment, equalisation and speaker protection are integrated into the EX28’s amplifier module.
The EX28’s high frequency compression driver is powered and controlled by KV2 Audio’s standard low intermodulation distortion, Class A/B, push-pull circuitry, designed to produce the lowest intermodulation distortion possible and the highest audio quality in the critical mid and high operating bands.
An improved version of KV2 Audio’s current enhancing, bass driver switching amplifier has been developed for the EX28. The new configuration improves overall system efficiency and increases output allowing passive radiation of heat to take place through a unique “fin-less” heat sink that can be placed in any position or direction. Additionally, the EX28 amplifier unit contains an internally located electric fan that is operated by a temperature sensing circuit which will slowly bring the fan on-line as required.

EX28 · Overview

33

EX28 · Overview
Acoustic Components
The EX28’s NVPD neodymium compression driver is loaded on a constant directivity horn designed for smooth, wide dispersion performance. More importantly, it has also been designed to precisely match the power response of the woofers at the crossover frequency, a crucial design objective that ensures smooth transition and minimizes anomalies. The EX28 horn design is based on constant directivity geometry with an emphasis on generating very low air distortion artifacts, maintaining low transducer compression ratios, high output and wide dispersion (100° x 80°). The horn is an injected molded aluminium part that functions as a heat dissipater for the compression driver’s neodymium magnetic motor structure.
Enclosure Design
The EX28 is a very compact, asymmetrical geometry enclosure design allowing it to be used in a variety of applications. A specially moulded aluminium handle was designed and fitted to the top of the cabinet. It functions as the principle pick up handle as well as providing fixed installation and hanging solutions. It has a centrally located M10 hang point.
34

EX28 · Overview

EX28 · AC Power Requirements
AC Power Requirements
The EX28 is an advanced self-powered loudspeaker with on-board amplification and control systems. Understanding power distribution, voltage and current requirements, as well as electrical safety issues, is critical to the safe operation of the EX28.
AC Power
The EX28 uses a PowerCon 3-pole AC main system with locking connectors to prevent accidental disconnection. The main AC connector (blue) serves as the power input.
The EX28 operates in either 115V or 230V modes. Although pre-configured at the factory, the unit’s operating voltage mode can be changed in the field.
Voltage Requirements
The EX28 operates safely and without audio discontinuity if the AC voltage stays within the operating window of 100V-130V in 115V mode and 200V-250V when working in 230V mode, at 50 or 60Hz.
If the On LED does not illuminate or the system does not respond to audio input, remove AC power immediately. Verify that the voltage is within the proper range. If the problem persists, please contact KV2 Audio or an authorized service center.
If the voltage drops below the low boundary of its safe operating range, the loudspeaker will shut down if the voltage does not rise above the low boundary before storage circuits are depleted. How long the loudspeaker will continue to function during brownout depends on the amount of voltage drop and the audio source level during the drop. If the voltage increases above the upper boundary of the range, the power supply can be damaged.
It is recommended that the voltage supply be within the rated voltage window. This ensures that AC voltage variations from the service entry – or peak voltage drops due to cable runs – do not cause the amplifier to cycle on and off or cause damage to the power supply.
For best performance, the AC cable voltage drop should not exceed 10 volts, or 10 percent at 115 volts and 5 percent at 230 volts.
Make sure that even with the AC voltage drop, the AC voltage always stays within recommended operating ranges. The minimum electrical service amperage required by an EX26 speaker system is the sum of each loudspeaker’s maximum continuous rms current. An additional 50 percent above that amperage is recommended to prevent peak voltage drops at the service entry.
The Power Connector
The EX28 requires a grounded outlet. It is very important that the loudspeaker AC supply be properly grounded in order to operate safely and properly. Use the PowerCon AC cable wiring diagram overleaf to create international or special-purpose power connectors:
Power connector assembly
35

EX28 · AC Power Requirements

EX28 · AC Power Requirements

Current Requirements
Each EX28 requires approximately 4 Amps max at 115V AC for proper operation. This allows up to three EX28’s to be powered fromn one 15 A breaker at 115V and up to seven EX28’s at 230V.
The EX28 presents a dynamic load to the AC mains, which causes the amount of current to fluctuate depending on quiet or loud operating levels. Since different cables and circuit breakers heat up at varying rates, it is essential to understand the types of current ratings and how they correspond to circuit breaker and cable specifications.
The maximum long-term continuous current is the maximum rms current during a period of at least ten seconds. It is used to calculate the temperature rise in cables, in order to select a cable size and gauge that conforms to electrical code standards. It is also used to select the rating for slow- reacting thermal breakers.
The burst current is the maximum rms current during a period of approximately one second, used to select the rating of most magnetic breakers and to calculate the peak voltage drop in long AC cables according to the formula: V pk (drop)= I pk x R (cable total)
The ultimate short-term peak current is used to select the rating of fast reacting magnetic breakers. Use the table below as a guide when selecting cable gauge size and circuit breaker ratings for your operating voltage.

Current Draw Max Long Term Continuous Burst Current Short Term Peak

115V Mode 4 A rms 6 A rms 16 A peak

230V Mode 2 A rms 4 A rms 8 A peak

AC Cable Color Coding
If the colours referred to in the diagram don’t correspond to the terminals in your plug, use the following guidelines: Connect the blue wire to the terminal marked with a N or coloured black. Connect the brown wire to the terminal marked with a L or coloured red. Connect the green and yellow wire to the terminal marked with a E or coloured green or green and yellow.

EX28 · AC Power Requirements

Power cable color coding The EX28 requires a ground connection. Always use a grounded outlet and plug.
36

EX28 · Audio Signal
The EX28 Control Panel
The EX28 features an easy to use control panel featuring AC power in, audio input and through output, level control, LED status light and a High Pass filter.

Audio Input and Output
The EX28 uses a balanced, female XLR connector for the audio input connector, and a male XLR connector to provide through output signal. The through output connector, wired in parallel to the audio input, will continue to provide the input signal if the EX28 is turned off. The audio input circuit presents a 20 k balanced input impedance to a three-pin XLR connector with the following connections:

EX28 Rear panel

Main input

Through output

Pin 1 – Ground Pin 2 – Signal (+) Pin 3 – Signal (-)

Case – Earth (AC) ground and chassis

Audio signal can be daisy-chained using the through output connector on the input panel. A single source can drive multiple EX28 speakers with a paralleled input loop. If you are driving multiple EX28’s make certain that the source device can drive the total load impedance presented by the paralleled input circuits.
The audio source must be capable of producing a minimum of 1.0V volts rms to produce the maximum peak SPL over the operating bandwidth of the loudspeaker. To avoid distortion from the source, make sure the source equipment provides an adequate drive circuit design for the total paralleled load impedance presented by the speakers. The input impedance for a single loudspeaker is 20 k. If “n” represents the number of EX28 loudspeakers in a system, paralleling the inputs of n loudspeakers will produce a balanced input load of 20 k divided by “n”.
If the loudspeaker produces noises such as hiss and popping, disconnect the audio cable from the loudspeaker, if the noise stops, then most likely the problem is not with the loudspeaker. Check the audio cable, source, and AC power for the source of the problem.
Ensure that all cabling carrying signal to multiple amplifiers and active speaker systems is wired correctly. Make sure that the polarity has not been reversed. Reversed polarity can cause severe degradation in frequency response and can also impact the dispersion characteristics of the speaker.

EX28 · Audio Signal

37

EX28 · Audio Signal
Power On / Signal LED
This LED turns green when the speaker is turned ON. The light will turn yellow when signal is present.
Low Cut Switch
The EX28 features a 90Hz High Pass Filter. Pressing the button engages this filter allowing the speaker to reproduce frequencies only above 90Hz.
Limiter
The EX28 employs a protection system based on rms limiting of the amplifiers. This type of protection strategy allows the speaker to operate safely under overload conditions. When the rms “limiter” engages, the output level of both amplifiers is reduced to a safe operating level. This type of protection allows the frequency response of the system to remain unchanged as the level is lowered. By not compressing or limiting peak signal, dynamics also remain unchanged. The control objective is to regulate the operating temperature of the transducers magnetic circuits long term. This ensures no impact on performance due to power compression and allows the components to retain their ability to reproduce high dynamics. When overdriven the rms limiter will disengage only if the input level is turned down.
Thermal Protection
In the unlikely event of over heating the speaker system will shut down. You can expect for the system to be down for at least 2-3 minutes depending on the ambient temperature and whether the system is being exposed to direct sun light. The EX28 features a fin-less heatsink that allows it to operate in any position. There is also an internal fan located inside the amplifier module. The fan speed is dependent on two factors; the temperature of the heat sink and the output level of the speaker. As temperature increases, so does fan speed. As audio level increases, fan speed also increases as a preventative measure designed to keep the heat sink temperature low. Under normal operating conditions, the fan noise remains inaudible. Please contact KV2 Audio or a local service representative should the system enter a thermal condition under normal operating conditions.
38

EX28 · Audio Signal

EX28 · Specifications

EX28 · Specifications
Specifications
System Acoustic Perfomance Max SPL Long-term Max SPL Peak -3dB Response -10dB Response Crossover Point
High Frequency Section Acoustic Design High Horn Coverage Horizontal / Vertical Throat Exit Diameter / Diaphragm Size Diaphragm Material Magnet Type
High Frequency Amplifier Specification Type Rated Continuous Power Distortion Operating Bandwidth
Low Frequency Section Acoustic Design Woofer Size / Voice Coil Diameter Magnet Type Diaphragm Material
Low Frequency Amplifier Specification Type Rated Continuous Power Distortion Operating Bandwidth
Signal Input Input Sensitivity Input Impedance
Power Power Connector Operating Voltage Range Recommended Amperage
Cabinet Cabinet Material Handles Pole Mount Color
Physical Dimensions Height Width Depth Weight
39

126dB 132dB 62Hz to 20kHz 52Hz to 28kHz 2kHz
Horn Loaded 100° x 80° 1″ / 1.75″ Titanium Neodymium
Class AB Push-Pull 50W <0.05% 2.0kHz to 28kHz
Front Loaded, Bass Reflex 8″ / 2″ (one feat. Trans coil) Neodymium Epoxy Reinforced Cellulose
High efficiency, Current-enhancing switch mode 450W <0.05% 62Hz to 2.0kHz
0,775V RMS 20 k
Neutrik PowerCon® 100 to 120V @ 60Hz | 230 to 250V @ 50Hz 6A 115V / 3A 230V
Baltic birch 1 35 mm “Orange peeled” Matt Black or any RAL
668 mm (26.29″) 260 mm (10.23″) 320 mm (12.59″) 23 kg (50.7lbs)

EX28 · Frequency characteristics
Frequency response

EX28 · Frequency characteristics

Horizontal Polarplots
73Hz – 250Hz

500Hz – 2kHz

4kHz – 16kHz

73Hz 125Hz 250Hz
Vertical Polarplots
73Hz – 250Hz

500Hz 1kHz 2kHz
500Hz – 2kHz

4kHz 8kHz 16kHz
4kHz – 16kHz

73Hz 125Hz 250Hz

500Hz 1kHz 2kHz

4kHz 8kHz 16kHz

40

EX28 · Drawings
Drawings
41

EX28 · Drawings

EX12

· Overview

EX10 – part number KVV 987 095 (250V) KVV 987 059 (230V) KVV 987 060 (115V)

Application
Designed for the highest quality vocal and full range live performance in medium size applications
· Suitable for medium to large conference, Theatre and small to medium scale concerts
· Scalable from stand alone to full range large systems incorporating
· EX subwoofers · Fixed installations · Stage monitoring

EX12 · Overview

Introduction
The EX12 is a 2-way high output, active, compact, fullrange speaker system. Design objectives for the EX12 were focused on the expansion of KV2 Audio’s primary philosophy of speakers systems with increased dynamic range, very high output and a consistent sound character no matter what the output level. The EX12 sets new levels of performance for compact cabinets achieved through the integration of new amplifier, transducer and electronic control technologies that are closely tied to a passion for taking performance to the next level.
Electronics
Amplifier power, electronic crossovers, phase alignment, equalization, time correction and speaker protection are integrated into the EX12’s amplifier module. On-board electronics ensures fast, easy set up and complete control. An improved version of KV2 Audio’s switch mode, current enhancing low frequency amplifier has been developed for the EX12. The new configuration improves overall system efficiency and increases output, allowing passive radiation of heat to take place through a unique “fin-less” heat sink that can be placed in any position or direction. This ensures cool operation in horizontal or vertical applications. Additionally, the EX12 amplifier unit contains an internally located electric fan that is operated by a temperature sensing circuit which will slowly bring the fan online as required in extreme, high temperature situations.
Months of research were invested into designing circuitry that ensures that the extreme dynamic range exemplified by the speaker system is maintained even under clipping conditions. The real test of the EX12 ‘s limits is when it is exposed to the rigors and demands of live audio playback where consistent clipping of amplifiers, generation of distortion artifacts, dramatic increases in the floor and the elimination of dynamic range put the product to an extreme test.
The EX12’s high frequency compression driver is powered and controlled by KV2 Audio’s standard low intermodulation distortion, Class A/B, push-pull circuitry, high and mid frequency amplifier design. Metal Oxide Silicon Field Effect Transistors (MOSFET) are used for the output stage and the compression driver coupled through a transformer balanced speaker output. The entire performance strategy for this type of design is based on producing the lowest intermodulation distortion possible and the highest audio quality in the critical mid and high operating bands.
42

EX12 · Overview
Acoustic Components
KV2 Audio has developed a revolutionary woofer technology called Trans-CoilTM. The woofer has two coils, a standard voice coil assembly and a second coil placed directly on the neodymium magnetic circuit’s pole piece. This technology eliminates voice coil inductance resulting in a flat impedance response above the resonance point and achieves faster transient response through increased force and control of the moving mass. It also linearises acoustic and electrical phase response, reduces harmonic distortion and increases power transfer and transducer speed. Through this technology, the speaker now behaves like both a woofer at lower frequencies and like a mid- range at higher frequencies allowing a seamless transition to take place at the crossover frequency. The EX12’s neodymium compression driver is loaded on a constant directivity horn designed for smooth, wide dispersion performance. More importantly, it has also been designed to precisely match the power response of the woofer at the crossover frequency, a crucial design objective that ensures smooth transition and minimizes anomalies. The compression driver is a new,3.00-inch titanium diaphragm design, featuring a radial phase plug,progressive parabolic semi-circle suspension,direct-drive nomex voice coil assembly and the industry ‘s largest neodymium magnetic motor structure.Each feature was developed over an extended period of time and implemented as part of a strategy to lower distortion,increase output and improve response characteristics. The EX12 horn was designed with one primary performance goal. The horn design is based on constant- directivity geometry with an emphasis on generating very low air distortion artifacts, maintaining low transducer compression ratios, high output and wide dispersion (80 x 40). The horn is an injected moulded aluminium part that functions as a heat dissipitater for the compression driver’s neodymium magnetic motor structure.
Enclosure Design
The EX12 is a very compact, asymmetrical geometry enclosure design allowing it to be used in a variety of applications and featuring a number of ergonomically designed components that make it lightweight and easy to use. An extensive set of professional hardware features enables the EX12 to be used in a variety of environments using an array of industry standard hardware.These facilitate both portable and fixed installations with a maximum amount of mounting flexibility. A specially molded aluminum top handle was designed and fitted to the top of the cabinet. It functions as the principle pick up handle as well as providing several fixed installation and hanging solutions. It has a centrally located M10 hang point as well as four additional M6 bracket points. The handles four principal mounting bolts also provide an OmnimountTM bracket point. There are two side-mounted M10 hang points that can be used with brackets or eyebolts.
43

EX12 · Overview

EX12 · AC Power Requirements
AC Power
The EX12 uses a PowerCon 3-pole AC main system with locking connectors to prevent accidental disconnection. The main AC connector (blue) serves as the power input. The EX12 operates in either 115V, 230V or 250V modes. Although pre-configured at the factory, the unit’s operating voltage mode can be changed in the field.
Voltage Requirements
The EX12 operates safely and without audio discon – tinuity if the AC voltage stays within the operating window of 100V-120V in 115V mode, 205V-240V in 230V mode and 225V-260V when working in 250V mode, at 50 or 60Hz. If the On LED does not illuminate or the system does not respond to audio input, remove AC power immediately. Verify that the voltage is within the proper range. If the problem persists, please contact KV2 Audio or an authorized service center. If the voltage drops below the low boundary of its safe operating range, the loudspeaker will shut down if the voltage does not rise above the low boundary before storage circuits are depleted. How long the loudspeaker will continue to function during brownout depends on the amount of voltage drop and the audio source level during the drop. If the voltage increases above the upper boundary ofthe range, the power supply can be damaged. It is recommended that the voltage supply be within the rated voltage window. This ensures that AC voltage variations from the service entry- or peak voltage drops due to cable runs – do not cause the amplifier to cycle on and off or cause damage to the power supply. For best performance, the AC cable voltage drop should not exceed 10 volts, or 10 percent at 115 volts and 5 percent at 230 volts. Make sure that even with the AC voltage drop, the AC voltage always stays within recommended operating ranges. The minimum electrical service amperage required by a EX12 speaker system is the sum of each loudspeaker’s maximum continuous rms current. An additional 50 percent above the minimum amperage is recommended to prevent peak volt-age drops at the service entry.
The Power Connector
The EX12 requires a grounded outlet. It is very important that the loudspeaker AC supply be properly grounded in order to operate safely and properly. Use the PowerCon AC cable-wiring diagram on page 36 to create international or special-purpose power connectors:
Power connector assembly
44

EX12 · AC Power Requirements

EX12 · AC Power Requirements

Current Requirements
Each EX12 requires approximately 5 Amps max at 115V AC for proper operation. This allows up to three EX12’s to be powered from one 15 A breaker at 115V and up to 6 loudspeakers at 230V or 250V.
The EX12 presents a dynamic load to the AC mains, which causes the amount of current to fluctuate depending on quiet or loud operating levels. Since different cables and circuit breakers heat up at varying rates, it is essential to understand the types of current ratings and how they correspond to circuit breaker and cable specifications.
The maximum long-term continuous current is the maximum rms current during a period of at least ten seconds. It is used to calculate the temperature rise in cables, in order to select a cable size and gauge that conforms to electrical code standards. It is also used to select the rating for slow- reacting thermal breakers.
The burst current is the maximum rms current during a period of approximately one second, used to select the rating of most magnetic breakers and to calculate the peak voltage drop in long AC cables according to the formula: V pk (drop)= I pk x R (cable total)
The ultimate short-term peak current is used to select the rating of fast reacting magnetic breakers. Use the table below as a guide when selecting cable gauge size and circuit breaker ratings for your operating voltage.

Current Draw Max Long Term Continuous Burst Current Short Term Peak

115V Mode 5 A rms 7.5 A rms 20 A peak

230V, 250V 2.5 A rms 5 A rms 10 A peak

AC Cable Color Coding
If the colors referred to in the diagram don’t correspond to the terminals in your plug, use the following guidelines: Connect the blue wire to the terminal marked with a N or colored black. Connect the brown wire to the terminal marked with a L or colored red. Connect the green and yellow wire to the terminal marked with a E or colored green or green and yellow.

EX12 · AC Power Requirements

Power cable color coding The EX12 requires a ground connection. Always use a grounded outlet and plug.
45

EX12 · Audio Signal
The EX12 Control Panel
The EX12 features an easy to use rear control panel featuring audio input and output, level control, LED status lights and a low pass filter that can be engaged when the loudspeaker is used as a stage monitoring device.

EX12 · Audio Signal

EX12 Rear panel

Audio Input and Output
The EX12 uses a balanced, female XLR connector for the audio input connector, and a male XLR connector to provide through output signal. The through output connector, wired in parallel to the audio input, will continue to provide the input signal if the EX12 is turned off. The audio input circuit presents a 20 kOhm balanced input impedance to a three-pin XLR connector with the following connectors:

Main input

Through output

Pin 1 – Ground Pin 2 – Signal (+) Pin 3 – Signal (-)

Case – Earth (AC) ground and chassis

Audio signal can be daisy-chained using the through output connector on the input panel. A single source can drive multiple EX12 speakers with a paralleled input loop. If you are driving multiple EX12’s in an array, make certain that the source device can drive the total load impedance presented by the paralleled input circuit of the array.
The audio source must be capable of producing a minimum of 20 dB volts (10 volts rms into 600 ohms) to produce the maximum peak SPL over the operating bandwidth of the loudspeaker. To avoid distortion from the source, make sure the source equipment provides an adequate drive circuit design for the total paralleled load impedance presented by the array. The input impedance for a single loudspeaker is 20 kOhms. If “n” represents the number of EX12 loudspeakers in a system, paralleling the inputs of n loudspeakers will produce a balanced input load of 20 kOhms divided by “n”.
Most source equipment is safe for driving loads no smaller than 10 times the source’s output impedance. For example, cascading an array of 10 units consisting of EX12 speakers produces an input impedance of 2000 ohms (20kOhms divided by 10). The source equipment should have output impedance of 200 ohms or less. This is also true when connecting EX12’s in parallel (loop out) with other KV2 Audio amplifiers and active speakers and subwoofers.
If the loudspeaker produces noises such as hiss and popping, disconnect the audio cable from the loudspeaker, if the noise stops, then most likely the problem is not with the loudspeaker. Check the audio cable, source, and AC power for the source of the problem.
Ensure that all cabling carrying signal to multiple amplifiers and active speaker systems is wired correctly. Make sure that the polarity has not been reversed. Reversed polarity can cause severe degradation in frequency response and can also impact the dispersion characteristics of the speaker.

46

EX12 · Audio Signal
Amplifiers and Acoustic Filters
The EX12 is powered by two separate power amplifiers specifically designed and optimised for the low frequency and high frequency drivers. The control system in the EX12 processes the audio signal through a series of electronic filters and circuits providing equalization, crossover filters, phase adjustment, thermal and overdrive protection.
The EX12 employs a protection system based on rms limiting of the amplifiers. This type of protection strategy allows the speaker to operate safely under overload conditions. When the rms “limiter” engages, the output level of both amplifiers is reduced to a safe operating level. This type of protection allows the phase response of the system to remain unchanged as the level is lowered. Buy not compressing or limiting peak signal, dynamics also remain unchanged. The control objective is to regulate the operating temperature of the transducers magnetic circuits log term. This ensures no impact on performance due to power compression and allows the components to retain their ability to reproduce high dynamics.
LED Status Lights
The EX12 control panel uses two distinct LED’s to provide operating status information.
Power On / Limiter LED
This LED turns green when the speaker is turned ON. The light will continue to be green during normal operation of the speaker system. Should the rms limiting system be engaged due to overdriving of the EX12, the LED will change color from green to yellow. The audible effect of the rms limiter is a lowering of overall output level. The rms limiter will disengage only if the input level is turned down.
Signal / Thermal LED
This LED turns green when there is audio signal present in the EX12. This signal indicator can be used to troubleshoot wiring problems. The LED will change from green to yellow under a thermal condition resulting from overheating of the amplifier system. Under this condition, the speaker system will shut down. You can expect for the system to be down for at least 2-3 minutes depending the ambient temperature and whether the system is being exposed to direct sun light.
The EX12 features a finless heatsink that allows it to operate in any position. There is also an internal fan located inside the amplifier module. The fan speed is dependent on two factors; the temperature of the heat sink and the output level of the speaker. As temperature increases, so does fan speed. As audio level increases, fan speed also increases as a preventative measure designed to keep the heat sink temperature low. Under normal operating conditions, the fan noise remains inaudible. Please contact KV2 Audio or a local service representative should the system enter a thermal condition under normal operating conditions.
Stage Monitor Filter
The EX12 features a 90 Hz Monitor Filter control. Depressing the button engages a low pass audio filter allowing the speaker to be effectively used to reproduce frequencies above 90Hz. When using EX12 as a stage monitor, the horn should be rotated 90º.
47

EX12 · Audio Signal

EX12 · Specifications
Specifications
System Acoustic Perfomance Max SPL Long-term Max SPL Peak -3dB Response -10dB Response Crossover Point
High Frequency Section Acoustic Design High Horn Coverage Horizontal / Vertical Rotatable Horn Throat Exit Diameter / Diaphragm Size Diaphragm Material Magnet Type
High Frequency Amplifier Specification Type Rated Continuous Power Distortion Operating Bandwidth
Low Frequency Section Acoustic Design Woofer Size / Voice Coil Diameter / Design Magnet Type Diaphragm Material
Low Frequency Amplifier Specification Type Rated Continuous Power Distortion Operating Bandwidth
Signal Input Input Sensitivity Input Impedance
Power Power Connector Operating Voltage Range Recommended Amperage
Cabinet Cabinet Material Handles Pole Mount Color
Physical Dimensions Height Width Depth Weight

127dB 133dB 55Hz to 22kHz 45Hz to 30kHz 1.1kHz
Horn Loaded 80° x 40° NO 1.4″ / 3″ Nitride Titanium Neodymium
Class AB Push-Pull 50W <0.05% 1.1kHz to 30kHz
Front Loaded, Bass Reflex 12″ / 3.0″ / Trans Coil Neodymium Epoxy Reinforced Cellulose
High efficiency, Current-enhancing switch mode 450W <0.05% 45Hz to 1.1kHz
1.0V RMS 20 k
Neutrik PowerCon® 100 to 120V@60Hz | 205 to 240V@50Hz | 225 to 260V@50Hz 6A 115V | 3A 230V | 3A 250V
Baltic birch 2 35 mm “Orange peeled” Matt Black or any RAL
596 mm (23.46″) 368 mm (14.49″) 368 mm (14.49″) 29 kg (63.8lbs)
48

EX12 · Specifications

EX12 · Frequency characteristics
Frequency response

EX12 · Frequency characteristics

Horizontal Polarplots
73Hz – 250Hz

500Hz – 2kHz

4kHz – 16kHz

73Hz 125Hz 250Hz
Vertical Polarplots
73Hz – 250Hz

500Hz 1kHz 2kHz
500Hz – 2kHz

4kHz 8kHz 16kHz
4kHz – 16kHz

49

73Hz 125Hz 250Hz

500Hz 1kHz 2kHz

4kHz 8kHz 16kHz

EX12 · Drawings
Drawings
50

EX12 · Drawings

EX15 · Overview

EX15 – part number KVV 987 267 (230V) KVV 987 266 (115V)

Application
Primarily designed as a true full- range stand-alone device for multiple applications, whilst presenting the highest quality, definition and dynamic range
· Suitable for medium to large conference · Theatre and small to medium scale concerts · Scalable, can be used if required with EX subwoofers · Portable or fixed installations

EX15

· Overview

Introduction
The EX15 is a 3-way high output, active, fullrange speaker system. Design objectives for the EX15 were to present our consistent focused expansion of KV2 Audio’s primary philosophy of speakers systems, with increased dynamic range, very high output and a recognisable sound character no matter what the output level. The EX15 sets new levels of performance for compact full-range cabinets, achieved through the integration of new amplifier, transducer and electronic control technologies that are closely tied to a passion for taking performance to the next level.
Electronics
Amplifier power, electronic crossovers, phase alignment, equalization, time correction and speaker protection are integrated into the EX15’s amplifier module. On-board electronics ensure fast, easy set up and complete control. An improved version of KV2 Audio’s switch mode, current enhancing low frequency amplifier has been developed for the EX15. The new configuration improves overall system efficiency and increases output allowing passive radiation of heat to take place through a unique “fin-less” heat sink that can be placed in any position or direction. This ensures cool operation in horizontal or vertical applications. Additionally, the EX15 amplifier unit contains an internally located electric fan that is operated by a temperature sensing circuit which will slowly bring the fan online as required in extreme, high temperature situations.
Months of research were invested into designing circuitry that ensures that the extreme dynamic range exemplified by the speaker system is maintained even under clipping conditions. The real test of the EX15’s limits is when it is exposed to the rigors and demands of live audio playback where consistent clipping of amplifiers, generation of distortion artifacts, dramatic increases in the floor and the elimination of dynamic range put the product to an extreme test.
The EX15’s high frequency compression driver is powered and controlled by KV2 Audio’s standard low intermodulation distortion, Class A/B, push-pull circuitry, high and mid frequency amplifier design. Metal Oxide Silicon Field Effect Transistors (MOSFET) are used for the output stage and the compression driver coupled through a transformer balanced speaker output. The entire performance strategy for this type of design is based on producing the lowest intermodulation distortion possible and the highest audio quality in the critical mid and high operating bands.
51

EX15 · Overview
Acoustic Components
The new EX15 incorporates a unique coaxial 15″ transducer with a 1.75″ Nitride Titanium Neodymium Compression. Driver on a wide dispersion 80 x 60 degree horn. Whilst most coaxial speakers will try to cover the full frequency response, the EX15’s coaxial driver only covers bass and highs leaving the all important mid-range to a 6″ neodymium speaker mounted on a large 80 x 60 degree horn. This resolves the issue of the 15″ driver trying and failing to reproduce mid-range, a common problem with conventional coaxial designs. The EX15’s unique design provides extremely flat, full range reproduction from a compact yet powerful package that out performs speakers twice its size, weight and price.
Enclosure Design
The EX15 is a logistical compact, asymmetrical geometry enclosure design, allowing it to be used in a variety of applications and featuring a number of ergonomically designed components that make it easy to move and use. An extensive set of professional hardware features enables the EX15 to be used in a variety of environments using an array of industry standard hardware.These facilitate both portable and fixed installations with a maximum amount of mounting flexibility.
52

EX15 · Overview

EX15 · AC Power Requirements
AC Power
The EX15 uses a PowerCon 3-pole AC main system with locking connectors to prevent accidental disconnection. The main AC connector (blue) serves as the power input. The EX15 operates in either 115V, 230V or 250V modes. Although pre-configured at the factory, the unit’s operating voltage mode can be changed in the field.
Voltage Requirements
The EX15 operates safely and without audio discon – tinuity if the AC voltage stays within the operating window of 100V-120V in 115V mode, 205V-240V in 230V mode and 225V-260V when working in 250V mode, at 50 or 60Hz. If the On LED does not illuminate or the system does not respond to audio input, remove AC power immediately. Verify that the voltage is within the proper range. If the problem persists, please contact KV2 Audio or an authorized service center. If the voltage drops below the low boundary of its safe operating range, the loudspeaker will shut down if the voltage does not rise above the low boundary before storage circuits are depleted. How long the loudspeaker will continue to function during brownout depends on the amount of voltage drop and the audio source level during the drop. If the voltage increases above the upper boundary of the range, the power supply can be damaged. It is recommended that the voltage supply be within the rated voltage window. This ensures that AC voltage variations from the service entry- or peak voltage drops due to cable runs do not cause the amplifier to cycle on and off or cause damage to the power supply. For best performance, the AC cable voltage drop should not exceed 10 volts, or 10 percent at 115 volts and 5 percent at 230 volts. Make sure that even with the AC voltage drop, the AC voltage always stays within recommended operating ranges. The minimum electrical service amperage required by a EX15 speaker system is the sum of each loudspeaker’s maximum continuous rms current. An additional 50 percent above the minimum amperage is recommended to prevent peak volt-age drops at the service entry.
The Power Connector
The EX15 requires a grounded outlet. It is very important that the loudspeaker AC supply be properly grounded in order to operate safely and properly. Use the PowerCon AC cable-wiring diagram to create international or special- purpose power connectors:
Power connector assembly
53

EX15 · AC Power Requirements

EX15 · AC Power Requirements

Current Requirements
Each EX15 requires approximately 5 Amps max at 115V AC for proper operation. This allows up to three EX15’s to be powered from one 15 A breaker at 115V and up to 6 loudspeakers at 230V or 250V.
The EX10 presents a dynamic load to the AC mains, which causes the amount of current to fluctuate depending on quiet or loud operating levels. Since different cables and circuit breakers heat up at varying rates, it is essential to understand the types of current ratings and how they correspond to circuit breaker and cable specifications.
The maximum long-term continuous current is the maximum rms current during a period of at least ten seconds. It is used to calculate the temperature rise in cables, in order to select a cable size and gauge that conforms to electrical code standards. It is also used to select the rating for slow- reacting thermal breakers.
The burst current is the maximum rms current during a period of approximately one second, used to select the rating of most magnetic breakers and to calculate the peak voltage drop in long AC cables according to the formula: V pk (drop)= I pk x R (cable total)
The ultimate short-term peak current is used to select the rating of fast reacting magnetic breakers. Use the table below as a guide when selecting cable gauge size and circuit breaker ratings for your operating voltage.

Current Draw Max Long Term Continuous Burst Current Short Term Peak

115V Mode 5 A rms 7.5 A rms 20 A peak

230V, 250V 2.5 A rms 5 A rms 10 A peak

AC Cable Color Coding
If the colors referred to in the diagram don’t correspond to the terminals in your plug, use the following guidelines: Connect the blue wire to the terminal marked with a N or colored black. Connect the brown wire to the terminal marked with a L or colored red. Connect the green and yellow wire to the terminal marked with a E or colored green or green and yellow.

EX15 · AC Power Requirements

Power cable color coding The EX15 requires a ground connection. Always use a grounded outlet and plug.
54

EX15 · Audio Signal
The EX15 Control Panel
The EX15 features an easy to use rear control panel with audio input and output, level control, high and low frequency gain controls and LED status lights.

EX15 · Audio Signal

EX15 Rear panel

Audio Input and Output
The EX15 uses a balanced, female XLR connector for the audio input connector, and a male XLR connector to provide through output signal. The through output connector, wired in parallel to the audio input, will continue to provide the input signal if the EX15 is turned off. The audio input circuit presents a 20 kOhm balanced input impedance to a three-pin XLR connector with the following connectors:

Main input

Through output

Pin 1 – Ground Pin 2 – Signal (+) Pin 3 – Signal (-)

Case – Earth (AC) ground and chassis

Audio signal can be daisy-chained using the through output connector on the input panel. A single source can drive multiple EX15 speakers with a paralleled input loop. If you are driving multiple EX15’s in an array, make certain that the source device can drive the total load impedance presented by the paralleled input circuit of the array. The audio source must be capable of producing a minimum of 20 dB volts (10 volts rms into 600 ohms) to produce the maximum peak SPL over the operating bandwidth of the loudspeaker. To avoid distortion from the source, make sure the source equipment provides an adequate drive circuit design for the total paralleled load impedance presented by the array. The input impedance for a single loudspeaker is 20 kOhms. If “n” represents the number of EX15 loudspeakers in a system, paralleling the inputs of n loudspeakers will produce a balanced input load of 20 kOhms divided by “n”.
Most source equipment is safe for driving loads no smaller than 10 times the source’s output impedance. For example, cascading an array of 10 units consisting of EX15 speakers produces an input impedance of 2000 ohms (20kOhms divided by 10). The source equipment should have an output impedance of 200 Ohms or less. This is also true when connecting EX15’s in parallel (loop out) with other KV2 Audio amplifiers and active speakers and subwoofers.
If the loudspeaker produces noises such as hiss and popping, disconnect the audio cable from the loudspeaker, if the noise stops, then most likely the problem is not with the loudspeaker. Check the audio cable, source, and AC power for the source of the problem.
Ensure that all cabling carrying signal to multiple amplifiers and active speaker systems is wired correctly. Make sure that the polarity has not been reversed. Reversed polarity can cause severe degradation in frequency response and can also impact the dispersion characteristics of the speaker.

55

EX15 · Audio Signal
Amplifiers and Acoustic Filters
The EX15 is powered by two separate power amplifiers specifically designed and optimized for the low frequency and high frequency drivers. The control system in the EX15 processes the audio signal through a series of electronic filters and circuits providing equalization, crossover filters, phase adjustment, thermal and overdrive protection. The EX15 employs a protection system based on rms limiting of the amplifiers. This type of protection strategy allows the speaker to operate safely under overload conditions. When the rms “limiter” engages, the output level of both amplifiers is reduced to a safe operating level. This type of protection allows the phase response of the system to remain unchanged as the level is lowered. By not compressing or limiting peak signal, dynamics also remain unchanged. The control objective is to regulate the operating temperature of the transducers magnetic circuits log term. This ensures no impact on performance due to power compression and allows the components to retain their ability to reproduce high dynamics.
LED Status Lights
The EX10 control panel uses two distinct LED’s to provide operating status information.
Power On / Limiter LED
This LED turns green when the speaker is turned ON. The light will continue to be green during normal operation of the speaker system. Should the rms limiting system be engaged due to overdriving of the EX15, the LED will change color from green to yellow. The audible effect of the rms limiter is a lowering of overall output level. The rms limiter will disengage only if the input level is turned down..
Signal / Thermal LED
This LED turns green when there is audio signal present in the EX15. This signal indicator can be used to troubleshoot wiring problems. The LED will change from green to yellow under a thermal condition resulting from overheating of the amplifier system. Under this condition, the speaker system will shut down. You can expect for the system to be down for at least 2-3 minutes depending the ambient temperature and whether the system is being exposed to direct sun light. The EX15 features a finless heatsink that allows it to operate in any position. There is also an internal fan located inside the amplifier module. The fan speed is dependent on two factors; the temperature of the heat sink and the output level of the speaker. As temperature increases, so does fan speed. As audio level increases, fan speed also increases as a preventative measure designed to keep the heat sink temperature low. Under normal operating conditions, the fan noise remains inaudible. Please contact KV2 Audio or a local service representative should the system enter a thermal condition under normal operating conditions.
56

EX15 · Audio Signal

EX15 · Specifications

EX15 · Specifications
Specifications
System Acoustic Perfomance Max SPL Long-term Max SPL Peak -3dB Response -10dB Response Crossover Point
High Frequency Section Acoustic Design High Horn Coverage Horizontal / Vertical Throat Exit Diameter / Diaphragm Size Diaphragm Material Magnet Type Protection
High Frequency Amplifier Specification Type Rated Continuous Power Distortion Operating Bandwidth
Mid Range Section Acoustic Design High Horn Coverage Horizontal / Vertical Woofer Size / Voice Coil Diameter / Design Diaphragm Material Magnet Type Protection
Low Frequency Section Acoustic Design Woofer Size / Voice Coil Diameter Diaphragm Material Magnet Type Protection
Low Frequency Amplifier Specification Type Rated Continuous Power Distortion Operating Bandwidth
Signal Input Input Sensitivity Input Impedance
Cabinet Cabinet Material Handles Pole Mount Color
Physical Dimensions Height Width Depth Weight
57

129dB 135dB 44Hz to 18kHz 38Hz to 22kHz 500Hz, 2.7kHz
Horn Loaded 80° x 60° 1″ / 1.75″ Nitride Titanium Neodymium RMS Limiter
Class AB Push-Pull 50W <0.05% 2.7kHz to 22kHz
Horn Loaded 80° x 60° 6″ / 1.5″ Epoxy Reinforced Cellulose Neodymium RMS Limiter
Front Loaded, Bass Reflex 15″ / 4″ Epoxy Reinforced Cellulose Neodymium RMS Limiter
High efficiency, Current-enhancing switch mode 850W <0.05% 38Hz to 500kHz
1.0V RMS 20 k
Baltic birch 3 35 mm “Orange peeled” Matt Black or any RAL
700 mm (27.55″) 450 mm (17.71″) 450 mm (17.71″) 43 kg (94,8lbs)

EX15 · Frequency characteristics
Frequency response

EX15 · Frequency characteristics

Horizontal Polarplots
73Hz – 250Hz

500Hz – 2kHz

4kHz – 16kHz

73Hz 125Hz 250Hz
Vertical Polarplots
73Hz – 250Hz

500Hz 1kHz 2kHz
500Hz – 2kHz

4kHz 8kHz 16kHz
4kHz – 16kHz

73Hz 125Hz 250Hz

500Hz 1kHz 2kHz

4kHz 8kHz 16kHz

58

EX15 · Drawings
Drawings
59

EX15 · Drawings

EX Series Speakers · Accessories

PADDED HEAVY DUTY COVERS
Cover for EX6
part name: Cover EX6 part number: KVV 987 159 description: – heavy duty – padded

Cover for EX26
part name: Cover EX26 part number: KVV 987 209 description: – heavy duty – padded

Cover for EX10
part name: Cover EX10 part number: KVV 987 068 description: – heavy duty – padded

Cover for EX12
part name: Cover EX12 part number: KVV 987 067 description: – heavy duty – padded

EX Series Speakers · Accessories

Weatherproof cover for EX12
part name: Rainproof cover for EX12 part number: KVV 987 190 description: – sound-permeable
Weatherproof cover for EX15
part name: Rainproof cover for EX15 part number: KVV 987 518 description: – for EX15 – sound-permeable

60

EX

Series Speakers · Accessories

HORIZONTAL BRACKET
Horizontal Bracket for EX6
part name: EX6 Horizontal Bracket part number: KVV 987 495 description: – black – including two connection
bolts and bracket

VERTICAL BRACKET
Vertical Bracket for EX6
part name: EX6 Vertical Bracket part number: KVV 987 484 description: – for EX6, ESD6 – black – including two
connection bolts

Horizontal Bracket for EX26
part name: EX26 Horizontal Bracket part number: KVV 987 493 description: – black – including two
connection bolts and bracket

Vertical Bracket for EX26
part name: EX26 Vertical Bracket part number: KVV 987 492 description: – black – including two
connection bolts

Horizontal Bracket for EX10
part name: EX10 Horizontal Bracket part number: KVV 987 486 description: – for EX10, ESD10 – black – including two
connection bolts and bracket
Horizontal Bracket for EX28
part name: EX28 Horizontal Bracket part number: KVV 987 533 description: – for EX28 – black – including
two connection bolts

Vertical Bracket for EX10
part name: EX10 Vertical Bracket part number: KVV 987 485 description: – for EX10, ESD10 – black – including two
connection bolts
Vertical Bracket for EX28
part name: EX28 Vertical Bracket part number: KVV 987 532 description: – for EX28 – black – including two
connection bolts

EX Series Speakers · Accessories

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EX Series Speakers · Accessories

Horizontal bracket for EX12
part name: EX12 Horizontal Bracket part number: KVV 987 058 description: – for EX12 – black – including two
connection bolts and bracket

Vertical bracket for EX12
part name: EX12 Vertical Bracket part number: KVV 987 488 description: – for EX12, ESD12 – black – including two
connection bolts

EX12 Vertical Bracket Double
part name: EX12 Vertical Bracket Double part number: KVV 987 152 description: – for 2x EX12 – bolts included – black

Horizontal bracket for EX15
part name: EX15 Horizontal Bracket part number: KVV 987 035 description: – black – including top hat cover
adaptor plate and two connection bolts and bracket
Bracket Top Hat Adapter
part name: Top Hat Adapter part number: KVV 987 090 description: – for vertical and horizontal
brackets – including bolts – black

Vertical bracket for EX15
part name: EX15 Vertical Bracket part number: KVV 987 032 description: – black – including two
connection bolts
Pole mount adaptor for EX6
part name: Pole mount adaptor part number: KVV 987 151 description: – black – including locking bolt

EX Series Speakers · Accessories

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EX Series Speakers · Accessories
Grill fine options for EX6, EX26, EX10 and EX12
Grill – fine for EX6
part name: EX6 Grill – fine part number: KVV 987 350 description: – elegant design – suitable for installations
Grill – fine for EX26
part name: EX26 Grill – fine part number: KVV 987 351 description: – elegant design – suitable for installations
Grill – fine for EX10
part name: EX10 Grill – fine part number: KVV 987 330 description: – elegant design – suitable for installations
Grill – fine for EX12
part name: EX12 Grill – fine part number: KVV 987 329 description: – elegant design – suitable for installations
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EX Series Speakers · Accessories

EX Series Speakers · Accessories

Speaker pole – universal

part name: KV2-H part number: KVV 987 130

description: – Heavy duty telescopic
speakerpole – 0,735 to 1,23 m – diameter 35 mm – weight 2,2 kg – max. load 50 kg – bottom terminal M20 – matte black

min – max 735 mm – 1230 mm 28,937″ – 48.425″

Rotating the EX10 / EX12 Horn
The EX10 / EX12 horn can be rotated ninety degrees in order to accommodate applications where the speaker will be used or installed horizontally.

This can be accomplished by removing the front grill.

Removing the horn, rotating and replacing the horn.

Replacing the front grille.

EX Series Speakers · Accessories · Rotating the EX10 / EX12 Horn

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EX Series Speakers · Warranty · Service
Warranty
Your EX Series Speakers is covered against defects in material and workmanship. Refer to your supplier for more details.
Service
In the unlikely event that your EX Series Speakers develops a problem, it must be returned to an authorised distributor, service centre or shipped directly to our factory. Because of the complexity of the design and the risk of electrical shock, all repairs must be attempted only by qualified technical personnel. If the unit needs to be shipped back to the factory, it must be sent in its original carton. If improperly packed, the unit may be damaged. To obtain service, contact your nearest KV2 Audio Service Centre, Distributor or Dealer.
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EX Series Speakers · Warranty · Service

The Future of Sound. Made Perfectly Clear.
KV2 Audio International Nádrazní 936, 399 01 Milevsko Czech Republic Tel.: +420 383 809 320 Email: info@kv2audio.com
www.kv2audio.com
KVV120118-00-03-0

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