4
1. IMPORTANT NOTE
Congratulations! You are the owner of a 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 authorised Technical Services whenever any maintenance task is needed so
that optimum operation shall be achieved.
1.1. Precautions
This device must be grounded through its power cord.
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.
2. 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
3. INSTALLATION
3.1. Placement and assembly
The HSA series amplifiers come in 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 favour 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.
(36 pages)
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