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MICROPHONE PREAMPLIFIER
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Instruction Manual
3. INSTALLATION
3. INSTALLATION
3.1 UNPACKING AND INSPECTING
Your Aphex product was carefully inspected and packaged at the factory prior to shipment.
The carton and packing materials are designed to protect the unit during shipment, but
you should inspect the carton and its contents for signs of physical damage before use.
It is your responsibility to file a damage claim with the shipper. We encourage you to
save the original packing materials in case you should ever need to ship this unit out for
servicing.
3.2 MOUNTING
The Model 1788A occupies 2RU (90mm or 3.5 inches) of a standard EIA equipment rack.
Allow at least an additional 3” to 4” of depth for connectors. Place the Model 1788A in
the desired rack space and secure with the cushioned rack screws supplied or equivalent
hardware. Don’t position the Model 1788A directly above power amplifiers or power
supplies that produce strong hum fields or heat.
A word on rack mounting and ventilation
All electronic equipment will experience premature failure if operated at excessive
temperatures. The 1788A requires adequate vented air space for proper cooling. What
is adequate depends on the ambient temperature, proximity of other heat producing
equipment, and whether the air is moving or still. It is always best to err on the safe side.
We recommend at least one free rack space be allowed between each 1788A. The space
between units may be filled with perforated filler panels, but we recommend against
solid panels as they will restrict air flow. In severe cases, such as very hot climates or tight,
unventilated closets, a rack-top exhaust fan may be required to keep the air moving. One
of the best ways to know if you have adequate ventilation for a stack of 1788A’s is to feel if
the top unit’s chassis is substantially hotter then the bottom unit. If so, you should provide
better ventilation.
3.4 POWER CONNECTION
The Model 1788A uses a standard IEC power cord with a voltage range of 80 -280 VAC.
The appropriate mains plug for each country is normally shipped with each unit. However,
if you must install or replace the plug use the correct wiring code as follows:
AUX
OUTPUT
CH 8
MIC IN
LINE OUT
CH 7
MIC IN
CH 6
MIC IN
CH 5
MIC IN
CH 4
MIC IN
CH 3
MIC IN
CH 2
MIC IN
CH 1
MIC IN
MODEL 1788A - 8 Channel Mic Pre
Aphex Systems Sun Valley, CA
MIDI
IN
OUT
THRU
90-260 V~50/60Hz 60 WATTS
RS-232
WORD
CLOCK
OPTICAL
AES/EBU OUTPUT
LAN
TDIF
ADAT
IN
OUT
UTIL
1 2 3 4
ON
LINE OUT
LINE OUT
LINE OUT
LINE OUT
LINE OUT
LINE OUT
LINE OUT
3.3 REAR PANEL VIEW
USA
IEC/Continental
Black = Live
Brown = Live
White = Neutral
Blue = Neutral
Green = Ground
Yellow/Green = Earth
