Ecler HZA4-70F User Manual [en, de, es, fr]
USER MANUAL
MANUAL DE INSTRUCCIONES
NOTICE D'UTILISATION
BEDIENUNGSANLEITUNG
Graphic Symbol Explanation
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.
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.
The lightning flashes printed next to the OUTPUT terminals of the amplifier are intended
to alert the user to the risk of hazardous energy. Output connectors that could pose a risk
are marked with the lightning flash. Do not touch output terminals while amplifier power is
on. Make all connections with amplifier turned off.
WARNING: To prevent fire or shock hazard, do not expose this equipment to rain or moisture.
IMPORTANT SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus
(including amplifiers) that produce heat.
9. 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.
10. 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.
11. Only use attachments/accessories specified by the manufacturer.
12. Unplug the apparatus during lightening sorts or when unused for long periods of time.
13. Refer all servicing to qualified personnel. Servicing is required when the apparatus has been
damaged in any way, suck 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.
14. Disconnecting from mains: Switching off the POWER switch (25) all the functions and light
indicators of the amplifier will be stopped, but fully disconnecting the device from mains is done
unplugging the power cord from the mains input socket (26). For this reason, it always shall
remain readily operable.
15. Caution! The lateral heat sinks may have sharp edges.
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LIST OF CONTENTS
1. IMPORTANT REMARK 04
2. INTRODUCTION 04
3. INSTALLATION 05
3.1. Placement and mounting 05
3.2. Mains connection 05
3.3. Signal input connections 05
3.4. Output connections and channel linking with the FLEXIPOWER function 06
3.5. Internal switches for high-pass filters 07
3.6. Remote control ports for attenuation 07
3.7. REMOTE CONTROL ports connection 07
4. OPERATION AND USAGE 07
4.1. Start up 07
4.2. Front panel LED indicators 08
4.3. Front panel volume controls 08
4.4. AUTO STBY ON/OFF switch 08
5. CLEANING 08
6. DIAGRAMS 09
6.1. Function list 09
6.2. Function diagram 09
6.3. Technical characteristics 34
6.4. Configuration diagram 35
6.5. Block diagram 35
All numbers subject to variation due to production tolerances. ECLER SA reserves the right to make changes or
improvements in manufacturing or design which may affect specifications.
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1. IMPORTANT REMARK
Congratulations! You are the owner of a carefully designed and manufactured equipment. We
thank you for having purchased our HZA4-70F power amplifier.
It is VERY IMPORTANT that you read this manual before connecting the amplifier in order to
obtain its maximum performance.
We recommend our authorised Technical Services whenever any maintenance task should be
needed so that optimum operation shall be achieved.
2. INTRODUCTION
The HZA4-70F is a four-channel power amplifier with high impedance (100V line) directly
amplified outputs. Its main features are:
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:
o 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.
o Great efficiency.
o Reduced weight.
Convection cooling, without fan, with the following benefits:
o No background noise.
o 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.
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3. INSTALLATION
3.1. 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.
It is very important not to enclose the amplifier or expose it to extreme temperatures as it
generates heat. It’s also necessary to promote the passage of fresh air through the ventilation
holes of the chassis, leaving at least one rack unit off between each device and installed above
and below it in the rack frame.
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.
3.2. Mains connection
The NZA4-70 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.
3.3. Signal input connections
The amplifier HZA4-70F 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 -.
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STACK 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 20K (balanced) with a nominal input sensitivity of 0dBV(1V). This
impedance makes possible to parallel several amplifiers without loosing audio quality.
3.4. 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:
o The two outputs of the pair of channels and the speaker lines connected to these
channels will be connected in parallel
o The MERGE LED (6, 11, 16) light on the front panel, between the pair of channels, will
be lit
o 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)
o 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:
FLEXIPOW ER inputsrouting andassociatedvolumeco ntrols
MERGEDCHANNELS
Independent 1& 22& 33& 41& 2 &32& 3 &41& 2 &3& 4
CHANNEL1IN1IN1IN1IN1
CHANNEL2IN2IN2
CHANNEL3IN3IN3
CHANNEL4IN4IN4IN4 IN4
6
IN1
IN2
IN3
IN1
IN2
IN1
3.5. Internal switches for high-pass filters
Inside the amp 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 the SETUP DIAGRAM for more information.
3.6. Remote control ports for attenuation
The HZA4-70F 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).
3.7. 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.
NOTE
: 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 0.5mm
2
is used.
Consult the available accessories at your ECLER dealer or at www.ecler.com.
4. OPERATION AND USAGE
4.1. 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.
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4.2. Front panel LED indicators
The HZA4-70F 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
CLIP indicators illuminate to the 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 has been activated with the switches on the rear panel or not.
4.3. 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.
4.4. 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.
5. 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.
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6. DIAGRAMS
6.1. Function list 6.2. Function diagram
1. Automatic power off indicator, STBY
2. Signal presence, SP CH 1
3. Overload indicator, OVL CH 1
4. Clip indication, CLIP CH 1
5. Thermal protection indicator, TH CH 1
6. Merge indicator, MERGE 1 & 2
7. Signal presence, SP CH 2
8. Overload indicator, OVL CH 2
9. Clip indication, CLIP CH 2
10. Thermal protection indicator, TH CH 2
11. Merge indicator, MERGE 2 & 3
12. Signal presence, SP CH 3
13. Overload indicator, OVL CH 3
14. Clip indication, CLIP CH 3
15. Thermal protection indicator, TH CH 3
16. Merge indicator, MERGE 3 & 4
17. Signal presence, SP CH 4
18. Overload indicator, OVL CH 4
19. Clip indication, CLIP CH 4
20. Thermal protection indicator, TH CH 4
21. Volume, CH 1
22. Volume, CH 2
23. Volume, CH 3
24. Volume, CH 4
25. Power switch and pilot light, POWER
26. Mains socket
27. Fuse holder
28. Output terminals channel 4, CH 4
29. Output terminals channel 3, CH 3
30. Output terminals channel 2, CH 2
31. Output terminals channel 1, CH 1
32. MERGE switch 3 & 4
33. MERGE switch 2 & 3
34. MERGE switch 1 & 2
35. Screwable terminal for remote control, CH 4
36. Screwable terminal for remote control, CH 3
37. Screwable terminal for remote control, CH 2
38. Screwable terminal for remote control, CH 1
39. Standby mode selector, AUTO STBY
40. Input terminals channel 4, CH 4
41. Input terminals channel 3, CH 3
42. Output terminals to other amplifiers, STACK CH 2
43. Input terminals channel 2, CH 2
44. Output terminals to other amplifiers, STACK CH 1
45. Input terminals channel 1, CH 1
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Explicación de los Símbolos Gráficos
El símbolo del relámpago con una flecha en la punta y dentro de un triangulo equilátero,
tiene el propósito de alertar al usuario de la presencia de un voltaje peligroso y sin aislar
dentro del aparato, y de una magnitud tal que puede constituir riesgo de descarga
eléctrica para las personas.
El símbolo de exclamación dentro de un triangulo equilátero, tiene el propósito de alertar
al usuario de la presencia de instrucciones importantes sobre la operación y
mantenimiento en la información que viene con el producto.
Los símbolos de relámpagos dibujados cerca de los terminales de salida se utilizan para
alertar al usuario del riesgo de descargas peligrosas. Los conectores de salida que
podrían plantear algún riesgo se indican con este símbolo del relámpago. No toque los
terminales de salida mientras que el amplificador esté encendido. Hacer todas las
conexiones con el amplificador apagado.
ADVERTENCIA: para prevenir choques eléctricos o riesgo de incendios, no exponer este equipo a la
lluvia o la humedad.
INSTRUCCIONES IMPORTANTES DE SEGURIDAD
1. Lea estas instrucciones
2. Guarde estas instrucciones
3. Preste atención a todas las advertencias
4. Siga todas las instrucciones
5. No utilice este aparato cerca del agua
6. Límpielo solamente con un paño seco
7. No bloquee ninguna abertura para ventilación. Instálelo de acuerdo con las instrucciones del
fabricante
8. No lo instale cerca de fuentes de calor como radiadores, estufas u otros aparatos que produzcan
calor, incluidos amplificadores.
9. No elimine el propósito de seguridad del cable de corriente polarizado o con conexión de tierra.
Un cable polarizado tiene dos bornes, uno más ancho que el otro. Un enchufe con conexión a
tierra, tiene dos bornes y un tercer borne conectado a tierra. Este tercer borne está previsto para
su seguridad. Si el cable proporcionado no entra en su enchufe, consulte con un técnico
electricista para reemplazar ese enchufe obsoleto.
10. Proteja el cable eléctrico de ser aplastado, en especial en la zona de los conectores, los
receptáculos de los mismos y en el punto en el que el cable sale del aparato.
11. Utilice solamente los accesorios especificados por el fabricante.
12. Desconecte el aparato durante las tormentas eléctricas o cuando no lo vaya a usar durante
periodos largos de tiempo.
13. Para cualquier reparación, póngase en contacto con un servicio técnico cualificado. La
reparación es necesaria cuando el aparato no funciona con normalidad o ha sido dañado por
cualquier motivo, ya sea porque el cable o el enchufe estén dañados, porque se hayan
derramado líquidos o hayan caído objetos dentro del aparato, o porque el aparato haya sido
expuesto a la lluvia o se haya caído.
14. Desconexión de la red: apagando el interruptor de POWER (25) todas las funciones e
indicadores del amplificador se pararán, pero la completa desconexión del aparato se consigue
desconectando el cable de red de su conector (26). Por esta razón, éste siempre debe tener fácil
acceso.
15. ¡Precaución! Los radiadores laterales pueden tener bordes cortantes.
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ÍNDICE
1. NOTA IMPORTANTE 12
2. INTRODUCCIÓN 12
3. INSTALACIÓN 12
3.1. Ubicación y montaje 12
3.2. Conexión a red 13
3.3. Conexiones de entrada de señal 13
3.4. Conexiones de salida y enlace de canales mediante función FLEXIPOWER 14
3.5. Conmutadores internos para filtros paso-altos 14
3.6. Puertos de control remoto de atenuación 14
3.7. Conexionado de los puertos REMOTE CONTROL 15
4. FUNCIONAMIENTO 15
4.1. Puesta en marcha 15
4.2. Indicadores LED del panel frontal 15
4.3. Controles de volumen del panel frontal 16
4.4. Conmutador AUTO STBY ON / OFF 16
5. LIMPIEZA 16
6. DIAGRAMAS 17
6.1. Lista de funciones 17
6.2. Diagrama de funciones 17
6.3. Características técnicas 34
6.4. Diagrama de configuración 35
6.5. Diagrama de bloques 35
Todos los datos están sujetos a variación debida a tolerancias de producción. ECLER S.A. se reserva el derecho de
realizar cambios o mejoras en la fabricación o diseño que pudieran afectar las especificaciones.
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