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3. INSTALLATION
3.1. Location, assembly, ventilation
The APA600/1000/1400/2000 amplifiers are 2 RU high 19'' rack modules.
It is important that the amplifier, as a heat source, is not placed next to other
equipment nor exposed to high temperatures. Therefore, the ventilation path should be kept
free to allow fresh air entering the forced ventilation tunnel. This system takes air from the
unit's backside, bringing it directly to the power amp modules and distributing it to the
transformer and capacitors and then obliging it to pass trough the MOSFET cooling tunnel to
finally blow out of the front panel. In case of rack mounting, this system avoids heat
accumulation inside the unit and thus increases lifetime of electrolytic capacitors. It is
recommended to place power amplifiers on top of other equipment and not underneath.
All APA amplifiers are supplied with plastic washers in order not to damage the rack
ears when tightening the screws.
3.2. Mains connection
The APA amplifiers are fed with alternate currents, depending on the country, of
110-120, 220-240V 47/63Hz. (see characteristics in the back of the unit) consuming:
MODEL
APA600
APA1000
APA1400
APA2000
CONSUMPTION
830VA
1250VA
1720VA
3115VA
The mains cables must not be near the shielded cables carrying the audio signal, as this
could cause humming.
To protect the amplifier from eventual over charges of consumption, there are 5/9 time
lag fuses incorporated (see chart). Should a fuse blow, it must be replaced immediately by one of
identical characteristics. Should it blow again please consult 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.
FUSES
APA600 APA1000 APA1400 APA2000
power module (5x20)
T8A
T12A
T12A
T12A
mains (6x32)
T6.3A
T10A
T16A
--
mains (10x38)
--
--
--
T16A
auxiliary supply (5x20)
--
--
--
T250mA
3.3. Signal input connections
The signal input connectors are of XLR-3 type (19, 21), electronically balanced. The pin
assignment is as follows:
HOT or direct signal
>
Pin 2
COLD or inverted signal
>
Pin 3
GROUND
>
Pin 1
For unbalanced connection short-circuit pin 3 to pin 1.
