Ecler HSA300 Amplifier User Manual

: June 6, 2024
: ecler

Table of Contents

IMPORTANT NOTE
- Precautions
INTRODUCTION
INSTALLATION
OPERATION AND USAGE
CLEANING
DIAGRAMS
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HSA300
USER MANUAL

All numbers are 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

IMPORTANT NOTE

Congratulations! You are the owner of carefully designed and manufactured equipment. We thank you for your trust in having chosen our single-channel HSA300 amplifier.
For the maximum effectiveness of the amplifier, it is VERY IMPORTANT that you read this User’s Guide carefully and follow the recommendations contained herein before connecting it.
We recommend our authorized Technical Services whenever any maintenance task is needed so that optimum operation shall be achieved.

Precautions

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.

Any change in the configuration of the unit must be carried out by qualified technical personnel.
Before any work is done on the unit it should be disconnected from the power source.
There are no user-serviceable parts inside the unit.

CAUTION: RISK OF ELECTRIC SHOCK. DO NOT OPEN.

INTRODUCTION

The HSA300 is a single-channel power amplifier with a directly amplified high impedance output (100V line). Its main features are:

SPM 100 Technology – N Channel direct high impedance amplification (100V line), without output transformers, which has the following advantages over the classic amplification for a 100V line using transformers:
o Better frequency response in the low band of the audible spectrum (bass frequencies), in the absence of the usual degradation for this part of the spectrum caused by the saturation of the transformer cores
o High performance
o Low weight
Thermal protection
Overload protection
“Anti-clip” or anti-saturation system against strong input signals

INSTALLATION

Placement and assembly
The HSA series amplifiers come in a 19″ rack module format, two units high.
It is important that the amplifier, as a heat source, is not placed next to other equipment nor exposed to high temperatures.
If the installation is done inside rack cabinets enclosed by doors, it is highly recommended to fit these with forced ascending ventilation, installing fans at the top and bottom. This upward flow of ventilation will help in dissipating the heat generated inside.
In order to favor as far as possible the proper heat dissipation of the equipment units installed in rack cabinets, it is advisable not to place the power amplifiers under other devices, but rather above these.
The HSA amplifiers are supplied with plastic washers so they can be mounted in a rack without damaging the mounting flanges.

Mains connection
The amplifier is powered with alternating current, depending on the country, 110-120, 220-240V 50/60Hz. (see specifications plate on the device), and its maximum power draw is 482VA.
The amplifier must be connected to proper grounding ( resistance, Rg=30 Ω or less).
Avoid intertwining the main cable with the shielded cables that carry the audio signal, as this could lead to interference and humming.
In order to protect the unit from an eventual electrical overload or momentary power peaks from the internal circuits, it is fitted with a fuse. Should it ever blow, unplug the unit from mains and replace it with an identical one. If the new fuse blows again, contact our Authorized Technical Service immediately.

CAUTION: IN NO EVENT SHOULD A FUSE OF A HIGHER VALUE THAN THE NOMINAL VALUE BE INSTALLED.

Signal input connections
On its rear panel, the HSA300 amplifier has an analog, balanced and line-level input signal.
The signal input connectors are three-pin Euroblock connectors (11). The assignment of the connections is as follows:

Live or direct signal > Terminal +
The cold or inverted signal > Terminal –
Ground > Terminal ⊥
For unbalanced connections short the – terminal to ground.

The input impedance is 22k Ω (balanced) with a nominal sensitivity of 0dBV (1V). This impedance allows for a large number of amplifiers to be connected in parallel without degrading the sound quality.

Output connections
The OUTPUT section on the rear panel is fitted with a two-pin (10) Euroblock connector. During the wiring tasks of one or more amplifiers, always respect the relative polarity of the outputs (+ and – markings on each output connector), cabling, and speakers.

Internal switch for pass-high filters
Inside the amplifier, there is a (“jumper”) switch to enable/disable the high- pass filter of the amplifier, with a cut-off frequency set at 70Hz and with a slope of 18dB / octave. It is recommended that in certain applications the high pass filter should act on the 100V line, especially when the audio playback content is primarily vocal (paging announcements, for example).
Refer to section 6.5. Block diagram and 6.3. Configuration diagram for further information.

OPERATION AND USAGE

Turning on
This is done by means of the POWER ON (6) mains switch and the pilot light in the switch itself will come on.
In a full audio installation, it is essential to start up the equipment in the following sequence: sound sources, mixers, equalizers, processors, active filters, and finally, the power amplifiers. To shut these down, follow the reverse sequence. By following this sequence the peaks or transients produced by switching a device on or off will not affect the next ones in the chain, preventing these from getting to the speakers, which are the components that are likely to suffer damage in these cases.

LED indicators on the front panel
The HSA300 has the following LED indicators on the front panel:

SIGNAL (4) presence indicator: warns of the presence of a signal at the amplifier’s input. This indicator lights up when the signal present at the input exceeds -35dB
OVERLOAD (3) indicator: lights up when the channel reaches its power delivery capacity limit, due to a load with an excessively low impedance
CLIP (2) cut-off indicator: lights up when the signal delivered to the speakers is cut close to the actual cut-off level. This CLIP system takes into account the possible fluctuations in voltage of the power supply, always providing a true reading even though these exist. It is normal that when operating at high output power, the CLIP indicators light up in synchronization with the low frequencies, which carry the most energy. Ensure that these indicators do not stay permanently lit during the normal operation of the equipment
THERMAL (1) heat protection indicator: indicates that the amplifier has entered a state of overtemperature protection, its normal operation will be restored when its temperature returns to the normal operating temperature range.

Volume control on the front panel

The front panel has a rotating volume control (5) for the amplifier output level.
In the packaging of the device, you will find a bag with a transparent cap that can be fitted to the rotating control on the front panel. Its function is to protect the volume setting from accidental changes while the installation is being used. Once inserted it is necessary to use a flat screwdriver or a similar tool to remove it.
The transparent cap on the volume controls is for single use only. Additional units can be purchased as spare parts (ref: FCBOTD240100)

CLEANING

The front panel should not be cleaned with solvents or abrasive substances because the 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. Ensure that water never gets into the amplifier through the holes of the front panel.

DIAGRAMS

List of Functions

1. THERMAL, heat protection indicator	7. Mains socket
2. CLIP cut-off indicator	8. Fuse holder
3. OVERLOAD indicator	9. GND grounding terminal
4. SIGNAL presence indicator	10. OUTPUT screw-type connectors
5. Volume	11. INPUT screw-type connectors
6. POWER switch and start-up pilot light	12. Fan

Diagram of Functions

Configuration diagram

Block diagram

Technical characteristics

Power Output

85dB

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