eHSA2-250 / eHSA2-500
eHSA4-250 / eHSA4-500
HIGH IMPEDANCE AMPLIFIERS
Multichanel amplifiers
USER MANUAL
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INDEX
1. IMPORTANT REMARK ............................................................................................. 3
2. IMPORTANT SAFETY INSTRUCTIONS ....................................................................... 3
3. IMPORTANT NOTE.................................................................................................. 5
4. INTRODUCTION ...................................................................................................... 5
4.1 Main features ............................................................................................................ 5
5. INSTALLATION ........................................................................................................ 6
5.1 Placement, mounting, cooling .................................................................................. 6
5.2 Mains connection ...................................................................................................... 6
5.3 Input signal connections ............................................................................................ 6
5.4 High-pass filter .......................................................................................................... 7
5.5 Output connections ................................................................................................... 7
6. OPERATION AND USAGE ........................................................................................ 7
6.1 Start up ...................................................................................................................... 7
6.2 Input attenuators ...................................................................................................... 7
6.3 Indicators ................................................................................................................... 8
7. CLEANING .............................................................................................................. 8
8. FUNCTION DIAGRAM ............................................................................................. 9
9. FUNCTION LIST ....................................................................................................... 9
10. TECHNICAL CHARACTERISTICS .............................................................................. 10
11. BLOCK DIAGRAM .................................................................................................. 11
11.1 eHSA2-250 ............................................................................................................. 11
11.2. eHSA2-500 ............................................................................................................ 12
11.3. eHSA4-250 ............................................................................................................ 13
11.4. eHSA4-500 ............................................................................................................ 14
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1. IMPORTANT REMARK
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.
2. 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.
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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, 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.
15. Equipment is connected to a socket-outlet with earthing connection by
means of a power cord.
16. The marking information is located at the bottom of apparatus.
17. 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.
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3. IMPORTANT NOTE
Congratulations! You are the owner of a carefully designed and manufactured
equipment. We thank you for trusting on us and choosing our amplifier eHSA.
In order to obtain maximum operability 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
4. INTRODUCTION
The Ecler Essentials eHSA high impedance amplifier series offers the renowned
professional reliability of Ecler amplifiers at an affordable price.
The models covered by this manual are:
eHSA2-250: 2 x 250W RMS @ 100V
eHSA2-500: 2 x 500W RMS @ 100V
eHSA4-250: 4 x 250W RMS @ 100V
eHSA4-500: 4 x 500W RMS @ 100V
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 and DC OUT protection, as well as a protection
system against overload.
4.1 Main features
Easily accessible input attenuation controls on the rear panel.
Signal presence (SP), clipping (CLIP), protection against overload (PROT) and
thermal protection (TH) indicators.
Built-in, always active anticlip circuit
Switchable high-pass filter, type 3
rd
order Butterworth, 75 Hz
Balanced inputs on Euroblock connectors
Outputs on Euroblock connectors
Accepts high impedance loads on 100V line
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