ecler HZA4-120F Flexi-Power Amplifier User Manual
- June 3, 2024
- ecler
Table of Contents
ecler HZA4-120F Flexi-Power Amplifier
- CAUTION: RISK OF ELECTRIC SHOCK DO NOT OPEN
- WARNING: SHOCK HAZARD – DO NOT OPEN
- AVIS: RISQUE DE CHoc ÉLECTRIQUE NE PAS OUVRIR
caution: The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
warning: The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.
WARNING (If applicable): The terminals marked with symbol of “ ” may be
of sufficient magnitude to constitute a risk of electric shock. The external
wiring connected to the terminals requires installation by an instructed
person or the use of ready-made leads or cords.
WARNING: To prevent fire or shock hazard, do not expose this equipment to
rain or moisture.An apparatus with Class I construction shall be connected to
a mains socket-outlet with a protective earthing connection.
IMPORTANT SAFETY INSTRUCTIONS
- Read these instructions.
- Keep these instructions.
- Heed all warnings.
- Follow all instructions.
- Do not use this apparatus near water.
- Clean only with dry cloth.
- Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
- Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Do not defeat the safety purpose of the polarized or grounding type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
- Protect the power cord from being walked on or pinched particularly at the plugs, convenience receptacles, and at the point where they exit from the apparatus.
- Only use attachments/accessories specified by the manufacturer.
- Unplug the apparatus during lightening sorts or when unused for long periods of time.
- Refer all servicing to qualified personnel. Servicing is required when the apparatus has been damaged in any way, such as power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
- Disconnecting from mains: When switching off the POWER switch, all the functions and light indicators of the unit will be stopped, but fully disconnecting the device from mains is done by unplugging the power cable from the mains input socket. For this reason, it always shall remain easily accessible.
- Equipment is connected to a socket-outlet with earthing connection by means of a power cord.
- The marking information is located at the bottom of the unit.
- The apparatus shall not be exposed to dripping or splashing and that no objects filled with liquids, such as vases, shall be placed on apparatus.
WARNING: This product must not be discarded, under any circumstance, as unsorted urban waste. Take to the nearest electrical and electronic waste treatment centre.
NEEC AUDIO BARCELONA, S.L. accepts no liability for any damage that may be caused to people, animal or objects due to failure to comply with the warnings above.
IMPORTANT NOTE
Thank you for choosing our Ecler HZA4-120F Flexi-power Amplifier!
It is VERY IMPORTANT to carefully read this manual and to fully understand its contents before any connection in order to maximize your use and get the best performance from this equipment.
To ensure optimal operation of this device, we strongly recommend that its
maintenance be carried out by our authorised Technical Services.
Ecler HZA4-120F comes with a 3-year warranty.
INTRODUCTION
The HZA4-120F is a four-channel power amplifier with high impedance (100V line) directly amplified outputs.
Main Features
- Internal structure with four separate mono amplifiers, for 4 different mono input signals.
- The FLEXIPOWER technology can be used to link 2, 3 or 4 adjacent channels, adding their individual power, while operating as a single amplifier channel with a total power equivalent to the sum of the channels.
- Independent volume adjustment (per channel) through front panel controls.
- Independent (per channel) 0-10 VDC remote volume control, via screw terminals on rear panel.
- SPM 100 Technology – Channel N for direct high impedance amplification (100V line) without output transformers, which has the following benefits compared to traditional 100V line amplification with transformers:
- Better frequency response in the low band of the audible spectrum (low frequencies or bass) because there is no degradation of this part of the spectrum usually due to the saturation of transformers core.
- Great efficiency.
- Reduced weight.
- Convection cooling, without fan, with the following benefits:
- No background noise.
- Increased reliability.
- “Auto-standby” function: the amplifier automatically switches to standby mode (low consumption mode) when it remains approximately two minutes without detecting any input signal, then immediately switches back to normal operating mode when an input signal is re-detected.
- Thermal protection.
- Overload protection.
- “Anticlip” system to protect from saturation due to an excessively high signal level.
Placement and mounting
The amplifier is presented as a 2 unit high 19” rack module. It is supplied
with plastic washers in order not to damage the unit when tightening the
screws.
Remark: It is very important that the amplifier is not completely
enclosed, covered, or exposed to extreme temperatures, as the amplifier,
itself, generates heat. Proper ventilation is necessary, allowing air to pass
through the ventilation holes of the chassis. Leaving at least one rack unit
free between each device and those installed above and below it in the rack
frame is recommended.
If the setup has several amplifiers in the same rack or in a closed cabinet
with doors, it is highly recommended to supply them forced ventilation,
installing fans at the upper and lower ends. This upward air flow will help to
dissipate the heat generated inside.
In order to optimize as much as possible, the correct thermal dissipation of
equipment installed in a closed rack, it is advisable not to place power
amplifiers under other appliances, but upon these ones.
Mains connection
The HZA4-120F amplifiers are fed with alternate currents, depending on the
country, of 110-120, 220-240V 47-63Hz. (see characteristics in the back of the
unit).
The amplifier should have an earth connection in good conditions (earth
resistance, Rg=30 or less). The environment must be dry and dustless. Do not
expose the unit to rain or water splashes, and do not place liquid containers
or incandescent objects like candles on top of the unit. Do not obstruct the
ventilation grids with any kind of material.
In case there is some type of intervention and/or connection-disconnection of the amplifier, it is most important to previously disconnect the mains power supply. There are no user or serviceable parts inside the amplifier.
You should avoid that the supply cable twists with the shielded signal cables,
as this could lead to unwanted hum.
In order to protect the unit from an eventual electrical overload or momentary
power peaks from the internal circuits it carries a fuse. Should it ever blow
up, unplug the unit from mains and replace it with an identical one. If the
new fuse blows again contact immediately with our Authorized Technical
Service.
CAUTION: YOU MUST NEVER USE A HIGHER VALUE FUSE.
Signal input connections
The amplifier HZA4-120F features 4 balanced and line level analog signal
inputs (one per amplification channel) on its rear panel.
Signal input connectors are 3 position screw terminal block (40, 41, 43, 45).
The wiring is:
- HOT or direct signal >
- Pin + COLD or inverted signal >
- Pin – GROUND > Pin ⊥
For unbalanced connection short-circuit pin ⊥ to pin -.
TACK outputs (42, 44) available for inputs 1 and 2 are parallel to the input
and serve to re-send the signal of these inputs (INPUTS, CH1 / CH2 ) to other
input channels, amplifiers or sound systems.
The input impedance is 20KO (balanced) with a nominal input sensitivity of 0dBV(1V). This impedance makes possible to parallel several amplifiers without losing audio quality.
Output connections and channel linking with the FLEXIPOWER function
The rear panel OUTPUTS section is fitted with two position screw terminal
block (28, 29, 30, 31) for each amplifier channel. Always respect the relative
polarity for outputs (0 and 100 on each output connector), wiring and
speakers.
The FLEXIPOWER Function: a MERGE switch is installed between each pair of output connectors:
- When the switch is in the top position, the pair of channels has an independent behaviour; the FLEXIPOWER function will not be active
- When the switch is in the lower position (MERGE), the two channels will be linked and their individual power will be added:
- The two outputs of the pair of channels and the speaker lines connected to these channels will be connected in parallel
- he MERGE LED (6, 11, 16) light on the front panel, between the pair of channels, will be lit
- The audio content of the pair of channels becomes the sound source connected to the input of the channel with a lower number (input 1 for channel pair 1&2, input 2 for channel pair 2&3, input 3 for channel pair 3&4)
- The active front and remote volume control (if used) of the channel pair becomes that of the channel with a lower number (controls on channel 1 for channel pair 1&2, controls on channel 2 for channel pair 2&3, controls on channel 3 for channel pair 3&4)
PRECAUTION: DO NOT MANIPULATE THE “MERGE” SWITCHES WHEN THE AMPLIFIER IS SWITCHED ON
2, 3 or 4 adjacent channels can be linked (with a resulting double, triple or quadruple power), with the following sound source and volume control arrangement:
FLEXIPOWER inputs routing and associated volume controls
| MERGED CHANNELS
Independent| 1 & 2| 2 & 3| 3 & 4| 1 & 2 & 3| 2 & 3 & 4| 1 & 2 & 3 & 4
CHANNEL 1| IN 1| IN1| IN1| IN1|
IN1
| IN1|
IN1
CHANNEL 2| IN 2| IN2| IN2|
IN2
CHANNEL 3| IN 3| IN3| IN3
CHANNEL 4| IN 4| IN4| IN4| IN4
Internal switches for high-pass filters
Inside the amplifier there are four jumpers to activate/deactivate the high-
pass filter for each amplifier channel, with a cutoff frequency set at 70Hz
and a slope of 18dB/octave. The high-pass filter is recommanded for some 100V
line applications, especially when audio content is primarily vocal (public
address announcements, for example). See section 9.1. Configuration Diagram
for more information.
Remote control ports for attenuation
The HZA4-120F features 4 remote control ports labeled “REMOTE CONTROL” (35,
36, 37, 38) on its rear panel. You can connect WPm series, REVO control panels
etc. to each of these ports to remotely attenuate the input signal (and
therefore, the output volume of affected channels).
The maximum level of each amplification channel (and therefore its output
volume) that can be reached by the remote attenuator is determined by the
position of its front knob (21, 22, 23, 24).
REMOTE CONTROL ports connection
The signal remote attenuation level for each input channel can be set by using
3 types of external devices connected to the rear panel REMOTE CONTROL ports
:
- a) Using a remote potentiometer with nominal resistance between 10k and 50k, WPm series or equivalent.
- b) Using a device that generates a control voltage from 0 to 10V DC.
- c) Using remote relays/dry contacts.
Remark: you can connect up to 16 REMOTE CONTROL ports in parallel to the same hardware control potentiometer. You have to merge the ground of all amplifiers belonging to these ports.
The connection cables can be up to 500m long if a section of 0.5mm2 is used. Consult the available accessories at your ECLER dealer or at www.ecler.com.
OPERATION AND USAGE
Start up
This will be done through the POWER ON (25) switch and the built-in indicator
immediately lights.
In a complete audio installation, it is important to start up the equipment in
the following sequence: sound sources, mixer, equalizers, active filters,
processors and finally power amplifiers. To turn them off the sequence should
follow an inverse pattern.
Front panel LED indicators
The HZA4-120F is equipped with the following front panel LEDs:
-
STBY indicator (1): illuminates when the amplifier is in standby (low consumption mode), after approximately two minutes without any input signal detected. When an input signal is re-detected, the amplifier automatically switches back to normal operating mode.
-
Signal Presence indicators, SP (2, 7, 12, 17): warn of the presence of signal at the amplifier inputs. These indicators illuminate when the input signal exceeds -35dB.
-
Overload indicators, OVL (3, 8, 13, 18): illuminate when the channel reaches its maximum power capacity, due to a too low load impedance.
-
CLIP indicators (4, 9, 14, 19): illuminate when the speakers output signal is close to the actual clipping level. The CLIP system takes into account possible
fluctuations in the supply voltage if they exist, always giving a real indication. It is normal when you work at high power levels that normal when you work at high power levels that beat of the low frequencies, which are those with the higher energy content. Make sure this doesn’t permanently illuminate indicators during normal operating mode. -
Thermal protection indicators, TH (5, 10, 15, 20): indicate that the channel over-temperature protection has been activated; normal operation will be restored when the temperature returns to the correct operating temperature range.
-
MERGE Indicators: they indicate whether the FLEXIPOWER function that links two adjacent channels have been activated with the switches on the rear panel or not.
Front panel volume controls
The front panel features four volume knobs, one per channel, allowing
independent adjustment of the maximum output level for each amplifier channel.
Remote control ports also allow to adjust the volume of each amplifier channel
from a WPm series panel, a potentiometer or other external hardware device;
the actual volume of each channel is the result of the two volume controls
position (front panel and remote control).
In the device packaging, you’ll find a bag with clear caps to be inserted on
the front panel knobs. They protect the input attenuation settings from
unsolicited tampering. Once inserted, you must use a flathead screwdriver or a
similar tool to remove them.
AUTO STBY ON/OFF switch
Switch (39) that enables/disables the auto standby mode (sleep or low
consumption mode). If this function is activated, the amplifier will switch to
standby after approximately two minutes without any input signal detected.
When an input signal is re-detected, the amplifier automatically switches back
to normal operating mode.
CLEANING
The front panel should not be cleaned with dissolvent or abrasive substances because silk-printing could be damaged. To clean it, use a soft cloth slightly wet with water and neutral liquid soap; dry it with a clean cloth. Be careful that water never gets into the amplifier through the holes of the front panel.
CONTROL PANEL FUNCTIONS
Front Panel
-
Automatic power off indicator, STBY
-
Signal presence, SP CH 1
-
verload indicator, OVL CH 1
-
lip indication, CLIP CH 1
-
Thermal protection indicator, TH CH 1
-
erge indicator, MERGE 1 & 2
-
Signal presence, SP CH 2
-
Overload indicator, OVL CH 2
-
Clip indication, CLIP CH 2
-
Thermal protection indicator, TH CH 2
-
Merge indicator, MERGE 2 & 3
-
Signal presence, SP CH 3
-
Overload indicator, OVL CH 3
-
Clip indication, CLIP CH 3
-
Thermal protection indicator, TH CH 3
-
Merge indicator, MERGE 3 & 4
-
Signal presence, SP CH 4
-
Overload indicator, OVL CH 4
-
Clip indication, CLIP CH 4
-
Thermal protection indicator, TH CH 4
-
Volume, CH 1
-
Volume, CH 2
-
Volume, CH 3
-
Volume, CH 4
-
Power switch and pilot light, POWER
Rear Panel
-
Mains socket
-
Fuse holder
-
Output terminals channel 4, CH 4
-
Output terminals channel 3, CH 3
-
Output terminals channel 2, CH 2
-
Output terminals channel 1, CH 1
-
MERGE switch 3 & 4
-
ERGE switch 2 & 3
-
MERGE switch 1 & 2
-
Screwable terminal for remote control, CH 4
-
Screwable terminal for remote control, CH 3
-
Screwable terminal for remote control, CH 2
-
Screwable terminal for remote control, CH 1
-
Standby mode selector, AUTO STBY
-
Input terminals channel 4, CH 4
-
Input terminals channel 3, CH 3
-
Output terminals to other amplifiers, STACK CH 2
-
Input terminals channel 2, CH 2
-
Output terminals to other amplifiers, STACK CH 1
-
Input terminals channel 1, CH 1
DIAGRAMS
Configuration Diagram
Block Diagram
TECHNICAL CHARACTERISTICS
HZA4-120F __
Output power @ 1% THD
1 Channel| 114 WRMS @ 100V line
2 Merged Channels| 195 WRMS @ 100V line
4 Merged Channels| 290 WRMS @ 100V line
4 Merged Channels| 356 WRMS @ 100V line
Output power @ 10% THD|
1 Channel| 145 WRMS @ 100V line
2 Merged Channels| 226 WRMS @ 100V line
4 Merged Channels| 348 WRMS @ 100V line
4 Merged Channels| 430 WRMS @ 100V line
Others|
Frequency response (-3dB)| 30Hz – 55kHz
High pass filter 3rd order Butterworth| 70Hz
THD+Noise @ 1kHz Full Power| <0.03% typ. 0.2% max.
Signal Noise Ratio @ 100V| >90dB
Channel Crosstalk @ 1kHz/100V| >90dB
Inputs|
Sensitivity nom / Impedance| 0dBV/>20kW
Connectors| Terminal Block (Symmetrical)
Outputs|
Connectors| Terminal Block
Indicators|
Power| Green (ON), Red (Standby)
Signal Present /Clip/Overload/Thermal| -35dB / Yes / Yes /Yes
Remote control|
DC| 0-10V/0.1A max
No attenuation| 0V
Full attenuation| +10V
Connectors| Terminal block
Auto power|
Threshold| >-30dB aprox
Time| 100 sec. aprox
Mains voltage| 115V/230V. Voltage changed internally (NOT BY SWITCH)
Power consumption|
pink noise, 1/8 power @ 136Ω| 340VA
pink noise, 1/3 power @ 136Ω| 470VA
Standby| <3W
Dimensions|
Dimensions WxHxD:| 482.6 x 88 x 392mm (Handle excluded)
Weight| 13.60kg
All product characteristics are subject to variation due to production tolerances. NEEC AUDIO BARCELONA S.L. reserves the right to make changes or improvements in the design or manufacturing that may affect these product specifications.
For technical queries contact your supplier, distributor or complete the
contact form on our website, in Support / Technical requests.
Motors, 166‐168 08038 Barcelona ‐ Spain ‐ (+34) 932238403 |
information@ecler.com |
www.ecler.com
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