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USER MANUAL
MANUAL DE INSTRUCCI ONE S
NOTICE D'UTILISATION
BEDIENUNGSANLEITUNG
eGPA SERIES
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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 liter ature
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 radiator s, 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, 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.
14. Disconnecting from mains: Switching off the POWER switch 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. For this reason, it always shall remain readily
operable.
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USER MANUAL
1. IMPORTA NT NOTE 04
1.1. Precautions 04
2. INTRODUCTION 04
2.1. Main features 04
3. INSTALLATION 05
3.1. Placement, mounting, cooling 05
3.2. Mains connection 05
3.3. Input signal connections 05
3.4. Power saving mode 05
3.5. Limiter circuit 06
3.6. Output connections 06
4. OPERATION AND USAGE 06
4.1. Start up 06
4.2. Input attenuators 06
4.3. Indicators 07
5. CLEANING 07
6. FUNCTION DIAGRAM 08
7. FUNCTION LIST 09
8. TECHNICAL CHARACTERISTICS 34
9. BLOCK DIAGRAM 35
All numbers subject to variation due to production t olerances. NEEC AUDIO BARCELONA S.L. reserves the right t o make
changes or improvements in manufacturing or design which may affect specifications.
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1. IMPORTA NT NOTE
Congratulations! You are the owner of a carefully designed and manufactured equipment. We
thank you for trusting on us and choosing our amplifier eGPA.
In order to obtain maximum operativity and perfect functioning order, it is most important to carefully
read all considerations taken into account in this manual before connecting this amplifier.
We recommend our authorised Technical Services if any maintenance task should be needed so
that optimum operation shall be achieved.
1.1. Precautions
The amplifier should have an earth connection in good conditions (earth resistance, Rg=30Ω or
less). The environment m ust 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 shafts with any kind of material. In case there is some t ype of intervention and/or connectiondisconnection of the amplifier, it is most important to previously disconnect the mains power supply.
Do not manipulate the output terminals to the loudspeakers when the amplifier is switched on,
there are voltages up to 400Vpp. The output cabling should be connected by a qualified
technician. Otherwise only use pre-made flexible cables. There are no user serviceable parts
inside the amplifier.
Failure to do so may result in malfunction of the device and may even damage the device:
1. Avoid turning on the device without speakers connected to its outputs and without
setting the volume / gain controls to the minimum.
2. Always use shielded cables to make the connections between devices.
2. INTRODUCTION
The Ecler Essentials eGPA amplifier series offers the renowned professional reliability of Ecler
amplifiers at an affordable price. It consists of 4 models: with a power of 2 x 150W RMS @ 4Ω (eGPA2-
150), 4 x 150W RMS @ 4Ω (eGPA4-150), 8 x 150W RMS @ 4Ω (eGPA8
-150) and a last one with a
power of 2 x 310W RMS @ 4Ω (eGPA2
-300). All models use very high-performance technology, auto
standby and convection cooling, with a height of 1 rack unit.
Equipped with balanced inputs on Euroblock connectors. Outputs also feature Euroblock
connectors. It has an electronic limitation system to avoid signal saturation and a thermal protection, as
well as a protection system against overload.
2.1. Main features
- Easily accessible input attenuation controls on the front panel.
- Switchable auto standby circuit (energy saving mode when there is no input signal)
- Signal presence (SP), clipping (CLIP), protection against overload (PROT) and thermal
protection (TH) indicators.
- Built-in, always active ant ic lip c ircuit
- Operating mode selector: STEREO, MONO - BRIDGE
- Balanced inputs on Euroblock connectors
- Outputs on Euroblock connectors
- Accepts 8 or 4Ω loads (1 or 2 speakers (8Ω) in parallel)
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3. INSTALLATION
3.1. Placement, mounting, cooling
All eGPA amplifier models are presented in standard 19” rack format and are 1 unit high.
It is important that the amplifier, as a heat source, is not placed next to other equipment nor
exposed to high temperatures.
CAUTION: The built-in convection cooling r equires at least one free rack unit (em pty space) both
above and below each amplifier to ensure a correct air flow.
It is also advisable not to rack the power amplifiers under other devices, but on top of these,
that is to say as high as possible toward the top of the rack cabinet.
3.2. Mains connection
The eGPA amplifiers are powered by 100 to 250VAC, 50/60Hz.
The mains cables must not be near the shie lded cables carrying the audio sig nal, as this could
cause humming.
In order to protect the power amplifier from eventual power consumpt ion overloads , it is protected
by a set of fuses. Should a fuse blow, it must be replaced immediately by one with identical rating.
Should it blow again please contact our Technical Service Department. NEVER REPLACE THE FUSE
WITH ANOTHER ONE WITH A HIGHER VALUE.
CAUTION: Fuse substitutions have to be performed by a qualified technician.
3.3. Input signal connections
The signal input connectors are of EUROBLOCK (12, 13) and electronically balanced. The pin
assignment is as follows:
Hot or direct signal > +
Cold or phase inverted signal > Ground > Ground
For unbalanced connections, ground the negative terminal on the Euroblock.
In balanced mode, the input impedance is greater than 20k Ω (10kΩ unbalanced), allowing you to
connect a large number of stages in parallel without compromising the sound quality.
3.4. Power saving mode
The AUTO STBY (10) switch allows to activate the automatic switching circuit calling the power
saving mode (low power consumption) when it detects no audio signal from the unit's inputs during more
than 90 seconds, and automatically recovering normal operation when that signal reappears
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3.5. Limiter circuit
This is an extra protection always enabled in the eGPA series amplifiers. This circ uit dynamically
limits the input signal to avoid clipping of loud sig nals at the amplifier out put; it automatically reduces t he
input level not to exceed approximately 5% distortion.
The great utility of this circuit in any type of installation should be noted; the advantage of this
system over traditional compressors is that dynamics is practically not altered, due to its time constant.
3.6. Output connections
The output section on the rear panel features Euroblock connectors (15, 16).
In STEREO mode, each channel takes the sig nal f rom it s corr esponding inp ut ( OUTPUT CH1 f rom
INPUT CH1, OUTPUT CH2 f rom INPUT CH2 etc.) . In MONO/ BRIDGE mo de, the s ignal is tak en from the
odd input only.
To operate the amplifier in br idged mode, the " ST/MONO" (14) swit ch shall be on MONO/ BRIDGE.
The input signal connection is perf ormed using the odd channel connector and the speak er signal comes
out of the BRIDGE labeled term inals on the Euroblock output connector. Optionally you can connect the
other two output terminals to each other, in order to improve the distortion value. They have to be
connected with a short cable.
The connection cable that joins the amplifiers outputs and the loudspeakers must be of good
quality, sufficient section and as short as possible. This is most important when the distances to cover
are long ones.
4. OPERATION AND USAGE
4.1. Start up
The red "PROT" LEDs (7) light up when you turn on the power switch (11). A second after all
voltages have been stabilized and the amplifier is operating, "PROT" indicators turn off.
In a complete audio installation, it is im por t ant to power on the equipment according to the following
sequence: sound sources (microphones, music players, etc.), mixers, equalizers, active f ilters and power
amplifiers. To power off, follow the reverse sequence.
4.2. Input attenuators
This consists of rotary potentiometers, situated on the front panel (5, 6).
These attenuators allow connecting the amplifier to different types of mixers and processors,
independent level control and c onnection of speaker s that can' t handle the watt age supplied b y the out put
stage at full power, without risking damage if the volume of the preamplifier-mixer is set too high.
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4.3. Indicators
eGPA amplifiers include a simple yet effective indication system.
PROT/STBY indicators (7) show the absence of loudspeak er output sig nal. These indicator s may
light up for following reasons:
1. During start-up, until the STANDBY time has passed. This time period is needed for the
internal operating voltages to settle.
2. A short circuit is detected at the loudspeaker terminals (PROTECT function).
3. When the module enters AUTO-STANDBY mode. In this case, the indicator will illuminate in
orange instead of red.
If these indicators remain lit in red, there's a malfunction that should be investigated to find the
cause of this lighting.
CLIP (2, 4) indicators light up when the signal level feeding the loudspeakers is just below the
actual clipping. This CLIP system takes into account possible variations in the supply voltage, always
giving a real indication. CLIP indicators light up t o the beat of low fr equencies when working at high power
levels ; it's normal as low frequencies ar e those with hig her energ y content. You must take car e that these
indicators do not remain continuously lit.
SP Signal Presence indicators (1, 3) indicate the presence of a valid signal at the amplifier inputs.
The TH (THERMAL) (8) indicator lights when the unit has entered the protection mode due to
excessive temperature; normal operation is recover ed when the amplif ier internal t emperat ure com es back
down to regular operating levels.
5. CLEANING
The front panel should not be cleaned with dissolvent or abrasive substances because silkprinting 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. FUNCTION DIAGRAM
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7. FUNCTION L IS T
1. SP, signal presence indicator at the CH 1 input
2. CLIP, clipping indicator for CH 1
3. SP, signal presence indicator at the CH 2 input
4. CLIP, clipping indicator for CH 2
5. CH 1 input attenuator
6. CH 2 input attenuator
7. PROT/STBY, overload protection and Standby status indicator
8. TH, thermal protection indicator
9. ON power indicator
10. AUTO STANDBY switch
11. Power switch
12. CH 1, input 1 Euroblock connector
13. CH 2, input 2 Euroblock connector
14. STEREO, MONO/BRIDGE selector
15. CH 1, output 1 Euroblock connector
16. CH 2, output 2 Euroblock connector
17. AC socket connector
NOTE: Listed functions are for two-channel models; for models with more than two channels, the
number of these functions matches the number of amplifier channels.
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8. TECHNICAL CHARACTERISTICS 8. CARAC TERÍSTICAS TÉCNI CAS
8. CARACTÉRISTIQUES TECHNIQUES 8. TECHNISCHE DATEN
eGPA2-150
eGPA4-150
eGPA8-150
POW ER 20-20kHz 1% THD
1 Channel @ 4Ω
148 WRMS
148 WRMS
148 WRMS
1 Channel @ 8Ω
74 WRMS
74 WRMS
74 WRMS
All Channels @ 4Ω
145 WRMS
145 WRMS
144 WRMS
2 Bridged channels @ 8Ω
290 WRMS
290 WRMS
290 WRMS
Frequency response (-1dB, -3dB)
20Hz - 25kHz
20Hz - 25kHz
20Hz - 25kHz
Filter (High-Pass) 3rd order Butterworth
15Hz
15Hz
15Hz
THD+Noise @ 1kHz Full Pwr.
<0.05%
<0.05%
<0.05%
S+N/N 20Hz - 20kHz @ 1W/4Ω
>85dB
>85dB
>85dB
CMRR
>55dB
>55dB
>55dB
Damping factor 1kHz @ 8Ω
>150
>150
>150
Channel crosstalk @ 1kHz
>55dB
>55dB
>55dB
Input Sensitivity / Impedance
0dBV/>20kΩ
0dBV/>20kΩ
0dBV/>20kΩ
Anticlip @ 2dBV input
<1% THD
<1% THD
<1% THD
Mains Voltage
See characteristics in the back of the unit.
Power consumption (pink noise, 1/8 power @ 4Ω)
63W / 74VA
113W / 130VA
226W / 260VA
Power consumption (pink noise, 1/3 power @ 4Ω)
139W
268W
536W
Power consumption (Idle)
19W
29W
58W
Power consumption (STBY)
13W
18W
36W
Efficiency @ Pmax
77%
80%
80%
Dimensions WxHxD (Handle excluded)
440x44x161mm
440x44x221mm
440x44x341mm
Weight
2.65 kg
3.7kg
6.5kg
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9. BLOCK DIAGRAM 9. DIAGRAMA DE BLOQUES
9. SCHEMA DE BLOCS 9. BLOCKSCHALTBILD
eGPA2-150
eGPA4-150
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eGPA8-150
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eGPA8-150
NEEC AUDIO BARCELONA S.L.
Motors 166-168, 08038 Barcelona, Spain
INTERNET http://www.ecler.com
50.0300.01.00
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