ecler eHSA4-60 High Impedance Amplifiers User Manual
- June 9, 2024
- ecler
Table of Contents
eHSA4-60
HIGH IMPEDANCE AMPLIFIERS
Multichannel Amplifier
USER MANUAL
IMPORTANT REMARK
CAUTION
RISK OF ELECTRIC SHOCK DO NOT OPEN
WARNING: SHOCK HAZARD – DO NOT OPEN
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.
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.
WARNING: An apparatus with Class I construction shall be connected to a
mains socket-outlet with a protective earthing connection.
IMPORTANT SAFETY INSTRUCTIONS
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Read these instructions.
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Keep these instructions.
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Heed all warnings.
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Follow all instructions.
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Do not use this apparatus near water.
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Clean only with dry cloth.
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Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
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Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
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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.
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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.
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Only use attachments/accessories specified by the manufacturer.
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Unplug the apparatus during lightening sorts or when unused for long periods of time.
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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.
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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. -
Equipment is connected to a socket-outlet with earthing connection by means of a power cord.
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The marking information is located at the bottom of apparatus.
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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.
NOTE: This equipment has been tested and found to comply with the limits
for a Class A digital device, pursuant to part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the
user will be required to correct the interference at his own expense.
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 eHSA multichannel 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 eHSA comes with a 3-year warranty.
INTRODUCTION
eHSA4-60 is a 4x60W multichannel amplifier capable of working on both low
impedance lines (8 / 4 Ω) and high impedance lines (70/100V). It has the
ability to link the input channels, so that the same input signal can be
easily distributed to several or all output channels. Independent auto stand-
by function per channel.
The eHSA line of amplifiers offers the renowned professional reliability of
Ecler amplifiers at an affordable price. All models in the series use class D
amplification – a very highperformance technology -, auto stand-by function
and convection ventilation, only occupying 1 rack unit high.
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.
4.1 Main features
- 4-channel amplifier
- 60W per channel
- Each channel has independent outputs for low impedance or for high impedance (connection for independent 70 or 100V line).
- Controls for input attenuation in the frontal panel easily accessible.
- Class D amplification, high efficiency
- Auto stand-by switchable by means of front panel selector (energy saving mode in the absence of input signal). Independent by channel, with threshold selection (by means of internal jumper) also individual.
- Linking of adjacent inputs (Input link selector)
- Signal presence (SP), clipping (CLIP), protection against overload (PROT) and thermal protection (TH) indicators.
- Built-in, always active anticlip circuit
- Balanced inputs on Euroblock connectors
- Powered outputs on Euroblock connectors
5. INSTALLATION
Non-compliance with the instructions may cause malfunction and may even damage
the unit:
- Avoid turning on the device without speakers connected to its outputs and without having previously adjusted the volume / gain controls at minimum level.
- Always use shielded cables to make connections between devices.
5.1 Placement, mounting, cooling
All eHSA amplifiers 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 requires at least one free rack
unit (empty 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.
5.2 Mains connection
The eHSA amplifiers are powered by 100 to 250VAC, 50/60Hz.
The mains cables must not be near the shielded cables carrying the audio
signal, as this could cause humming.
In order to protect the power amplifier from eventual power consumption
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.
5.3 Input signal connections
The signal input connectors are of EUROBLOCK 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 (10k Ω
unbalanced), allowing you to connect a large number of stages in parallel
without compromising the sound quality. The inputs can be linked using the
Input link switches on the rear panel. When the switch is active (pressed)
between two input connectors, the input signal of one of the channels is
replicated on the adjacent channel, and the same input signal is available at
both amplified outputs, without the need to add external wiring or “bridging”
at the inputs.
For example, if there is a connection at the Channel 1 input and the LINK 1-2
switch is activated, the Channel 1 signal will be replicated on Channel 2. If
the LINK 2-3 switch is then pressed, the signal on channel 2 (which is
identical to the signal on channel 1 in this case), will be available on
channel 3. Inputs 1, 2 and 3 will therefore share the same audio signal.
5.4 Power saving mode
The AUTO STBY switch activates the power saving or low power consumption mode
(the PROT/STBY LED is orange when activated), this mode activates
automatically when it detects no audio signal from the unit’s inputs during
more than 90 seconds, and automatically recovers its normal operation when
that signal reappears. This function is independent on each channel, so if one
or more of the channels goes into power-saving mode, the rest will continue to
function normally. The detection threshold can be selected independently per
channel by means of an internal jumper. By default, it is in the -40dB
position. If it is necessary to modify this threshold, it is possible to set
it at -50dB. The lower the threshold, the more likely it is that the amplifier
channel will come out of standby mode with very low signal levels, or even
with background noise in the wiring between the sound source and the
amplifier, if this is considerable.
If you detect that the auto standby function is regularly and/or unexpectedly
activated (i.e. even if there is valid sound content at the amplifier’s
input), before changing the threshold, check that the input signal level
setting is adequate. For this purpose, the SP (Signal Present) LED should be
active when an audio signal is present, and the CLIP LED should not light up
or light up occasionally in line with the bass frequencies, which have the
highest energy content.
If the problem persists (the input audio signal has a wide dynamic range, for
example), change the detection threshold. First, remove the top cover of the
unit by unscrewing the screws that hold it to the chassis, to access the
connectors inside, then reposition the jumper for the channel you want to
change the threshold to.
5.5 Limiter circuit
This is an extra protection always enabled in the eHSA series amplifiers. This
circuit dynamically limits the input signal to avoid clipping of loud signals
at the amplifier output; it automatically reduces the 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.
5.6 Output connections
The output section on the rear panel features Euroblock connectors.
Connection to high impedance lines: The loudspeakers line has to be connected
to the amplifier’s 0V and 70V terminals (70V line) or 0V and 100V terminals
(100V line).
Connection on low impedance lines: The connection of the speaker line to the
amplifier should be made using the Lo-Z (“+” and “-“) terminals.
Each output channel is independent, so you can use your high or low impedance
connection regardless of how the other outputs are connected.
If you want to combine, in the same channel, high and low impedance, using the
2 connectors of the same channel, you have to consider the load you are
connecting to the terminals, never exceeding the 60W that the amplifier can
deliver. Thus, if a load of 4Ω is connected to the low impedance connectors,
it will not be possible to connect any
additional load to the 70/100V terminals (the amplifier will be protected), as
the maximum power transfer occurs to 4Ω and the amplifier delivers the
available 60W to it. However, if a load of 8Ω is connected to the low
impedance connectors, a line of up to 30W can be connected to the 70/100V
terminals, as at 8 Ω half of the available power is delivered. The rest of the
available power can be delivered in lines connected to the same channel, never
between different channels.
Note: the ground of the output connections are independent, never connect
the “-” terminal of the Lo-Z output together with the 0V terminal of the 70 /
100V line output.
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.
OPERATION AND USAGE
6.1 Start up
The red “PROT/STBY” LEDs light up when you turn on the power switch. A second
after all voltages have been stabilized and the amplifier is operating,
“PROT/STBY” indicators turn off.
In a complete audio installation, it is important to power on the equipment
according to the following sequence: sound sources (microphones, music
players, etc.), mixers,
equalizers, active filters and power amplifiers. To power off, follow the
reverse sequence.
6.2 Input attenuators
This consists of rotating potentiometers, situated on the front panel.
These attenuators allow connecting the amplifier to different types of mixers
and processors, independent level control and connection of speakers that
can’t handle the
wattage supplied by the output stage at full power, without risking damage if
the volume of the preamplifier-mixer is set too high.
6.3 Indicators
eHSA amplifiers include a simple yet effective indication system.
PROT/STBY indicators show the absence of loudspeaker output signal. These
indicators may light up for following reasons:
- During start-up, until the STANDBY time has passed. This time period is needed for the internal operating voltages to settle.
- A short circuit is detected at the loudspeaker terminals (PROTECT function).
- 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 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 to the beat
of low frequencies when working at high power levels; it’s normal as low
frequencies are those with higher energy content. You must take care that
these indicators do not remain continuously lit.
SP Signal Presence indicators indicate the presence of a valid signal at the
amplifier inputs.
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.
FUNCTION DIAGRAM
FUNCTION LIST
- LED indicator of signal presence at the channel input: SP
- Channel trim LED indicator: CLIP
- Channel input attenuator: CH1, 2, 3…
- LED indicator for overload protection and status STANDBY, PROT/STBY5. LED indicator for linked inputs, LINK
- AUTO STANDBY function switch
- Power indicator ON
- Euroblock connector channel input
- LINK input link switch (1-2, 2-3, 3-4)
- Euroblock connector low impedance Lo-Z channel output
- Euroblock connector high impedance channel output (70/100V)
- Network base
BLOCK DIAGRAM
TECHNICAL CHARACTERISTICS
eHSA4-60
Output power
Max output power¹ @ 4Ω
Max output power¹ @ 100V| 60W
60W
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Signal
Input sensitivity
Input impedance
Frequency response
THD + Noise
SNR
Channel crosstalk
Channel CMRR| 0dBV
20kΩ
Lo-Z output @ 4Ω: 70Hz – 30kHz (-3dB)
Hi-Z output @ 100V: 70Hz – 20kHz (-3dB)
Lo-Z output @ 4Ω: <0,06%
Hi-Z output @ 100V: <0,1%
Lo-Z output @ 4Ω: >90dB
Hi-Z output @ 100V: >70dB
65dB @ 1kHz
60dB @ 1kHz
AC Mains power
AC Mains requirement| 100 – 240VAC, 50 – 60 Hz (±10%)
Power Consumption
Power Consumption (1/3 Power, @ 4Ω)
Power Consumption (1/8 Power, @ 4 Ω)
Power Consumption (IDLE) Power Consumption (STBY)| 106W /115VA
52W / 68VA
15W / 30VA
7,6W / 18VA
Settings
Auto stand-by thresholdAuto stand-by time| 40dB / 50dB, Internally Selectable
90 seconds
Physical
Dimensions (WxHxD)
Weight| 482,6 mm x 44mm x 280mm / 19” x 1.7” x 11”
7,8 kg. / 17.2 lb.
¹All channels driven @ 1%THD
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 design or
manufacture that may affect these product specifications.
For technical queries please contact your supplier, distributor or complete
the contact form on our website under Support/Technical
Query.
Motors, 166‐168 08038 Barcelona ‐ España ‐ (+34) 932238403 |
information@ecler.com |
www.ecler.com
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