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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 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.
3.2. Mains connection
The eGPA 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.
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
(10k
Ω
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
