OMNITRONIC XDA Series PA Amplifier User Manual

OMNITRONIC XDA Series PA Amplifier

Stereo PA Amplifier with integrated SMPS

• Stereo PA amplifier with class D circuitry
• Low weight and height due to integrated switch mode power supply
• Speaker switch-on delay and auto limiters
• Model XDA-1002: two operating modes can be selected (stereo or bridged)
• 2 level controls
• LEDs for activated protective circuit, limiter, signal, and power
• Complete protection set against short-circuit, overheat, DC voltage, power on/off transients
• Ground lift switch against hummin
• Fan cooling
• Electronically balanced inputs via XLR mounting jacks with feed-through output
• Speaker outputs via lockable speaker jacks
• Rack installation with 1 unit

INTRODUCTION

Thank you for having chosen an OMNITRONIC amplifier. If you follow the instructions given in this manual, we are sure that you will enjoy this device for a long period of time. Please keep this manual for future needs.

CAUTION!
Keep this device away from rain and moisture!

For your own safety, please read this user manual carefully before you initially start-up.

This user manual is valid for the article number 10451635 and 10451636. You can find the
latest update at: www.omnitronic.de.

Every person involved with the installation, operation and maintenance of this device has to

• be qualified
• follow the instructions of this manual
• consider this manual to be part of the total product
• keep this manual for the entire service life of the product
• pass this manual on to every further owner or user of the product
• download the latest version of the user manual from the Internet

SAFETY INSTRUCTIONS

CAUTION!
Be careful with your operations. With a dangerous voltage you can suffer a dangerous electric shock when touching the wires!

HEALTH HAZARD!
By operating an amplifying system, you can produce excessive sound pressure levels that may lead to permanent hearing loss.

This device has left our premises in absolutely perfect condition. In order to maintain this condition and to ensure a safe operation, it is absolutely necessary for the user to follow the safety instructions and warning notes written in this user manual.

Damages caused by the disregard of this user manual are not subject to warranty. The dealer will not accept liability for any resulting defects or problems.

Unpacking
Please make sure that there are no obvious transport damages. Should you notice any damages on the connection panel or on the casing, do not take the speaker system into operation and immediately consult your local dealer.

Protection Class
This device falls under protection class I. The power plug must only be plugged into a protection class I outlet. The voltage and frequency must exactly be the same as stated on the device. Wrong voltages or power outlets can lead to the destruction of the device and to mortal electrical shock.

Power Cord
Always plug in the power plug least. The power plug must always be inserted without force. Make sure that the plug is tightly connected with the outlet. Never let the power cord come into contact with other cables!
Handle the power cord and all connections with the mains with particular caution! Never touch them with wet hands, as this could lead to mortal electrical shock.
Never modify, bend, strain mechanically, put pressure on, pull or heat up the power cord. Never operate next to sources of heat or cold. Disregard can lead to power cord damages, fire or mortal electrical shock. The cable insert or the female part in the device must never be strained. There must always be sufficient cable to the device. Otherwise, the cable may be damaged which may lead to mortal damage. Make sure that the power cord is never crimped or damaged by sharp edges.
Check the device and the power cord from time to time.
If extension cords are used, make sure that the core diameter is sufficient for the required power consumption of the device. All warnings concerning the power cords are also valid for possible extension cords.
Always disconnect from the mains, when the device is not in use or before cleaning it. Only handle the power cord by the plug. Never pull out the plug by tugging the power cord. Otherwise, the cable or plug can be damaged leading to mortal electrical shock. If the power plug or the power switch is not accessible, the device must be disconnected via the mains.
If the power plug or the device is dusty, the device must be taken out of operation, disconnected and then be cleaned with a dry cloth. Dust can reduce the insulation which may lead to mortal electrical shock. More severe dirt in and at the device should only be removed by a specialist.

Liquids
There must never enter any liquid into power outlets, extension cords or any holes in the housing of the device. If you suppose that also a minimal amount of liquid may have entered the device, it must immediately be disconnected. This is also valid, if the device was exposed to high humidity. Also if the device is still running, the device must be checked by a specialist if the liquid has reduced any insulation. Reduced insulation can cause mortal electrical shock.

Foreign Objects
There must never be any objects entering into the device. This is especially valid for metal parts. If any metal parts like staples or coarse metal chips enter into the device, the device must be taken out of operation and disconnected immediately. Malfunction or short-circuits caused by metal parts may cause mortal injuries.

Avoiding Hum
Never install the amplifier next to highly sensitive devices like pre- amplifiers or tape decks, as the strong magnetic field of the amplifier can produce hum in these devices. The magnetic field is strongest directly above or below the amplifier. If a rack is used, the amplifier should be installed at the bottom and the highly sensitive devices at the top.

Prior to Switching on
Before the unit is switched on all faders and volume controls have to be set to zero or minimum position.
Turn the amplifier on last and off first! Only connect the device when the power switch is off. Never connect output to output. Never connect the inputs or outputs to any power source (batteries, etc.)

Children and Amateurs
Keep away children and amateurs!

Maintenance and Service
There are no serviceable parts inside the speaker system. Maintenance and service operations are only to be carried out by authorized dealers!

OPERATING DETERMINATIONS

The PA amplifiers of the XDA series have been specially designed for stage and the disco applications. The amplifiers may be used in stereo or bridge (model XDA-1002) operation. The amplifiers and the speakers connected are protected through extensive protective circuits.

Power Supply
This product must only be connected to a power source matching the voltage and frequency stated on the device. The occupation of the connection cables is as follows:

The earth has to be connected! If the device will be directly connected with the local power supply network, a disconnection switch with a minimum opening of 3 mm at every pole has to be included in the permanent electrical installation. The device must only be connected with an electric installation carried out in compliance with the IEC standards. The electric installation must be equipped with a Residual Current Device (RCD) with a maximum fault current of 30 mA.

Installation
Do not shake the device. Avoid brute force when installing or operating the device. When choosing the installation spot, please make sure that the device is not exposed to extreme heat, moisture or dust. There should not be any cables lying around. You endanger your own and the safety of others!

Ambient Conditions
This product was designed for indoor use only. This device must never be operated or stockpiled in surroundings where splash water, rain, moisture or fog may harm the device. Moisture or very high humidity can reduce the insulation and lead to mortal electrical shocks. When using smoke machines, make sure that the device is never exposed to the direct smoke jet and is installed in a distance of 0.5 meters between smoke machine and device. The ambient temperature must always be between -5° C and +45° C. Keep away from direct insulation (particularly in cars) and heaters. The relative humidity must not exceed 50 % with an ambient temperature of 45° C. This device must only be operated in an altitude between -20 and 2000 m over NN. The ambient contamination must never exceed level 1 and must not be conducting, only dry. Never use the device during thunderstorms. Over voltage could destroy the device. Always disconnect the device during thunderstorms.

Cleaning
Never use solvents or aggressive detergents in order to clean the device! Rather use a soft and damp cloth.

Operation
Operate the device only after having familiarized with its functions. Do not permit operation by persons not qualified for operating the device. Most damages are the result of unprofessional operation!

Transport
Please use the original packaging if the device is to be transported.

Serial Barcode
Never remove the serial barcode from the device as this would make the guarantee void.

Modifications and Guarantee
Please note that damages caused by manual modifications on the device or unauthorized operation by unqualified persons are not subject to warranty. If this device will be operated in any way different to the one described in this manual, the product may suffer damages and the guarantee becomes void.
Furthermore, any other operation may lead to dangers like short-circuit, burns, electric shock, etc.

Avoiding Hearing Loss
By operating amplifying systems, you can produce excessive sound pressure levels that may lead to permanent hearing loss. Please refer to the explanations under “Legal instructions”.

Public and Industrial Use
Operating an amplification system in public or industrial areas, a series of safety instructions have to be followed that this manual can only give in part. The operator must therefore inform himself on the current safety instructions and consider them.

WEEE Directive
If the unit is to be put out of operation definitively, take it to a local recycling plant for a disposal which is not harmful to the environment. Do not dispose of as municipal waste. Contact your retailer or local authorities for more information.

Legal Instructions
Operating an amplification system can produce extremely high noise levels that may cause a permanent hearing loss. The legal instructions for using an amplification system vary from country to country.
The user must always inform himself on the legal instructions valid in his country and apply them to his situation.

Always monitor the sound pressure level when operating an amplification system in discotheques, concerts etc. Never exceed the permissible noise level exposures as specified by your authorities. The monitoring of the noise levels must be documented in an appropriate way.

In Germany, the following instructions are binding:
Strafgesetzbuch § 223 ff:
bundesrecht.juris.de/bundesrecht/stgb
TA Lärm: www.umweltdaten.de
DIN 15905-5: www.din.de
Arbeitsstättenverordnung § 15:
www.lgl.bayern.de/arbeitsschutz
Berufsgenossenschaftliche Vorschrift BGV B3: www.pro.info
VDI-Richtlinie: VDI 2058 Blatt 2: www.vdi.de

Hearing damage caused by high noise levels can be treated as physical injury and persecuted by law.
Please note that the organizer is responsible for keeping to a specified noise level. If this noise level will be exceeded, the event may be cancelled immediately.

If the organizer does not fulfill his safety duties, he is reliable by civil law for any damages occurred, e.g.: Pay the treatment costs of the damaged person. Pay a smart money to the damaged person.
Economic damage caused can be demanded from the operator of the amplification system.
If hired persons work with amplification systems: the noise levels of music events are almost always too high. This is why the entrepreneur has to set up warning signs and provide hearing protectors. The staff has to use these.

OMNITRONIC cannot be made liable for damages caused by incorrect installations and excessive noise levels!

Information on Hearing Loss
More and more young people suffer from hearing loss of 25 decibel or more, mainly caused by loud music from portable MP3 and CD players or discotheques.
Everybody operating amplification systems should know to what sound pressure levels he exposes his or the audience’s hearing. As an average levels between 75 and 105 dB(A) in the discotheque or 95 and 115 dB(A) at a rock concert are reached. Individual peaks can exceed the pain level at 130 dB(A). Such levels are typical for motor chainsaws or jack hammers.

It is important to know that doubling the power increases the noise level by 3 dB. The human hearing does only recognize a doubling of the sound level when the noise level is increased by 10 dB. Damaging the hearing does not depend on the sound level but on the noise level and starts way before the pain level.

Many people deceive themselves by thinking that noise is something they can get accustomed to. It is possible that a positive opinion of a certain noise can reduce the physiological reaction, but the slow impacts on the inner hearing must not be neglected: over stimulation and continuous elimination of the Cortic organ’s hair cells.

The reason why some people have got accustomed to a certain noise level and are no longer disturbed is that they have already suffered a hearing damage. This damage makes the insensitive to those frequencies forming the loudest part of the noise. Getting accustomed to noise does not mean anything other than trying to get along with the hearing loss in everyday life. The hearing loss itself cannot be healed;
it can only be compensated by hearing aids.

Subjectively, the hearing loss feels like dampened ears.
This effect weakens with the time, but a loss in hearing sensitivity often remains.

In order to relax the hearing sufficiently, the noise level should not exceed 70 dB(A) for 10 hours. Higher noise levels during this relaxing period can prevent the relaxation and promote a permanent hearing damage (Tinnitus) or hearing loss. Therefore: Whoever wants to maintain his hearing should use hearing protectors!

Overview on the Different Noise Levels

10 dB       Heartbeat| 80 dB Heavy traffic or telephone ringing
20-30 dB Whisper| 90 dB Pneumatic drill
40 dB       Average home| 100 dB Power mower
50 dB       Light traffic| 120 dB Boom box in car
60 dB       Normal conversation| 130 dB Pain level
70 dB       Vacuum cleaner| 140 dB Jet plane 30 meters overhead

OPERATING ELEMENTS & CONNECTIONS

Front Panel

• LIMIT: overload
• SIG: signal indication
• ON: power indication
• PROT: protective circuit active

2| CH A and CH B controls| Level controls channel A and channel B
3| POWER switch| Switches the amplifier on an off

Rear Panel

avoid humming
6| Speaker connectors| Speaker jacks and screw terminals for channel A and B
7| Input jacks| XLR jack for channel A and B for connecting units with line level
8| Feed-through outputs| XLR jacks for connection of a further amplifier
9| Model XDA-1002:
Operating mode selector switch| Switches between stereo and bridge operation

SETUP

Rack Installation
This amplifier is built for 19″ racks (483 mm). This rack use should be a double-door rack where front panel and rear panel can be opened. The rack should be provided with a cooling fan. When mounting the amplifier into the rack, please make sure that there is enough space around the device so that the heated air can be passed on. Steady overheating will damage your device. You can fix the amplifier with four screws M6 in the rack. If several devices are to be installed, make sure that you leave 1 unit space between the devices.

Making the Connections
All connections have to be made or changed only if the amplifier is switched off!

1. Inputs: The connection of the inputs depends on the operating mode selected. Therefore, prior to making any connections, select the operating mode according to your desired application. Then connect the output of line signal sources (e.g. preamplifier or mixer) to the XLR inputs.

2. Feed-through output : For parallel connection of a further PA amplifier, the feed-through output LINK can be used via the balanced XLR jacks. Connect this output to the input of the second PA amplifier.

3. Speaker outputs : In stereo mode, the amplifier can operate two speakers or two speaker groups.
   Model XDA-1002 can be switched over to bridge operation to supply the double output power. Then it operates as 1-channel amplifier and supplies power to one 8 Ω speaker or one 8 Ω speaker group. For connecting speakers, Speaker jacks are provided. Turn each plug to the right until it locks into place.
   For unlocking, pull the unlock button and turn the plug to the left.
   Notes: Always use sufficiently dimensioned cables (min. 2.5 mm²). When interconnecting several speakers, it is especially important to consider the correct connection to positive and negative contacts and that the minimum total impedance is 4 Ω for stereo and parallel operation, and 8 Ω for bridge operation. Please refer to skilled personnel if you are not familiar with the connection of several speakers.

4. Power supply : Finally connect the amplifier to a mains outlet with the mains cable.

Stereo Operation

In stereo mode, both channels are operated independently of each other. The highest output power during stereo operation is achieved by connecting 4 Ω speakers. With 8 Ω speakers the output power will be slightly reduced. For stereo operation, use both speaker pairs and make sure the operating mode selector switch is disengaged.

Bridge Operation (Model XDA-1002)
In bridge mode, both amplifier channels are combined to one mono amplifier achieving the highest output power at one speaker. The input signal of channel A is additionally switched to channel B in an inverted way.
Thus, the voltage at the output is doubled and subsequently the output impedance. A signal at the input of channel B is ignored. The volume is adjusted with the control of channel A together for both outputs. For bridge operation, press the operating mode selector switch.

OPERATION

Selecting the Operating Mode (Model XDA-1002)
Select the operating mode with the corresponding selector switch:

• switch disengaged = stereo operation (both channels are operated independent of each other)
• switch pressed = bridge operation (The input signal of channel A is additionally switched to channel B. A
  signal at channel B is ignored and volume adjustment is made with the level control for channel A.)

Switching On/Off

1. To prevent loud switching noise, always switch on all other units of the amplifier system before switching on the power amplifier. After operation, switch off the power amplifier first. Prior to switching on set all level controls to the left stop position and make sure that the operating mode selector switch is set to the correct position.
2. Switch on the amplifier with the power switch. The protection indicator PROT lights up for about 10 seconds. If they it does not, check if the amplifier is connected to the mains correctly. After the turn-on delay the speakers are activated (protection indicator PROT is off). Afterwards the power indicator lights up and indicates that the amplifier is switched on.

Adjusting the Level

1. First, set the volume controls of the preamplifiers to zero and turn the level controls of the amplifier to mid-position. There should be no loud humming. Should humming persist, check the connection cables between the preamplifier and the amplifier (switch off components before).
2. Adjust the level controls to the desired volume value. In case of overload, the red LIMIT indicator lights up. In this case, reduce the volume correspondingly.
3. In bridge mode the level control for channel B is disabled. Volume adjustment is made with the level control for channel A.

Ground Lift Switch
If an interfering hum noise can be heard without a music signal, a ground loop may be the reason for this.
The ground lift selector switch allows for interrupting the ground loop and the humming should be eliminated.
For this purpose press the selector switch. Thus signal ground and housing ground are separated.

Protective Circuits
The integrated protective circuits prevent damage to the speakers and the amplifier. If activated, the speakers are electrically separated from the amplifier and the protect indicator PROT lights up.

PROBLEM CHART

• The power cord is not connected.

|

• Check the power cord and any extension cables.

No sound.|

• The power cord of the respective device is not connected properly or not connected at all.
• The connection socket or the plug is dirty.

|

• Check the power cord and if the plugs are tightly connected with the sockets.
• Clean the socket and/or the plug.

Fans do not work, LEDs do not light up.|

• The power cord is not connected.

|

• Please check if the power is available

PROT LED lights up permanently.|

• Amplifier is overheated due to impurities.
• Impedance of speakers too low.
• Short-circuit in speaker connection or in speakers.
• Technical default of amplifier.

|

• Clean the fan grille.
• Connect other speakers.
• Check speakers.
• Switch amplifier off and have the device checked by a service technician.

CLEANING AND MAINTENANCE

1. DANGER TO LIFE! Disconnect from mains before starting maintenance operation! Please use a soft lint-free and moistened cloth. Never use alcohol or solvents!
2. There are no serviceable parts inside the device. Maintenance and service operations are only to be carried out by authorized dealers.
3. Should you need any spare parts, please use genuine parts. If the power supply cable of this device becomes damaged, it has to be replaced by a special power supply cable available at your dealer. Should you have further questions, please contact your dealer.

TECHNICAL SPECIFICATIONS

| XDA-1002| XDA-2402
---|---|---
Power supply:| 230 V AC, 50 Hz
Power consumption:| 210 W (1/8 power)| 465 W (1/8 power)
Power output sine: Stereo 4 Ω
Stereo 8 Ω
8 Ω bridged|

2 x 510 W
2 x 300 W
1 x 1000 W

|

2 x 1200 W
2 x 880 W

Frequency range:| 30-20000 Hz
Distortion factor:| <0.05 %
Voltage gain:| 36 dB at 8 Ω
S/N ratio:| >100 dB
Input sensitivity:| 1.25 V RMS
Input impedance::| 20 kΩ (balanced), 10 kΩ (unbalanced)
Input connectors:| 2 x XLR
Output connectors:| 2 x Speaker, 2 x XLR feed-through output
Circuitry:| Class D
Control elements:| Power switch, level control per channel, mode switch (model XDA-1002), ground lift switch
LED indicators:| Protect, limit, signal, power
Protection circuits:| Short-circuit, overheat, DC voltage, power on/off transients, softstart
Construction:| Steel chassis
Dimensions (DxWxH):| 240 x 483 x 44 mm (19″, 1 U)| 355 x 483 x 44 mm (19″, 1 U)
Weight:| 4 kg| 6.4 kg

Specifications are subject to change without notice due to product improvements

CUSTOMER SUPPORT

© OMNITRONIC 2016
Änderungen und Irrtum vorbehalten.
Subject to change without prior notice.
00102959
Version 1.1
TECHNOLOGY DESIGNED OR PLEASURE
WWW.OMNITRONIC.DE

References

• StGB - nichtamtliches Inhaltsverzeichnis
• DIN - Deutsches Institut für Normung
• Omnitronic: Ihr Hersteller und Großhändler für Audioequipment
• A virtual server
• Verein Deutscher Ingenieure e.V. | VDI
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