6
5.
INSTALLATION
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 (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
(10k
unbalanced), allowing
you to connect a large number of stages in parallel without compromising the sound quality.
