C. Power Connection - Audio Research High Definition Reference 80S User Manual

RS-232 Control
The Reference 80S has an RS-232
connector on the back panel, in the
event the amplifier is incorporated
into an automated or two-way remote
communication system. Please see your
dealer or contact service@audioresearch
to acquire specific codes relative to the
RS-232 control.
A.C. Power Connection
It is important that the Reference 80S
be connected via its supplied 20 amp
IEC 12-gauge power cord to a secure,
dedicated A.C. power receptacle.
Never connect to convenience power
receptacles on other equipment. Only
use the power switch on the front of the
Reference 80S for On/Off control of the
amplifier, or the 12V start-up trigger or RS-
232 for remote installations.
The AC power source for the Reference
80S amplifier should be capable of
supplying 15 amperes for 100 or 120 volt
units, or 10 amperes for 220 or 240 volt
units.
For the very best performance, the
Reference 80S should be connected to its
own AC power circuit branch, protected
by a dedicated circuit breaker. The
preamplifier and other audio equipment
should be connected to a different power
circuit and breaker, if possible.
14
The Reference 80S uses a grounding
system that does not require a ground
lifter adapter plug on the A.C. power cord
to minimize hum. The power cord supplied
with the Reference 80S has a standard
grounding plug to provide maximum safe-
ty when properly connected to a ground-
ed wall receptacle. If there is any question
regarding proper grounding procedures
in your installation, seek help from a qual-
ified technician. Caution should be taken
before using custom after-market power
cords: they must be at least 12-gauge and
have a standard grounding plug properly
installed. These power cords are to be
used with caution, at the sole risk of the
owner. If electronic crossovers or other
AC powered equipment is used with the
Reference 80S it may be necessary to use
'ground lifter' adapters on the power plugs
of that equipment to minimize system hum.
Generally, the lowest hum is achieved
when the only direct connection between
audio common 'ground' and true earth
ground occurs in the preamplifier, through
its grounded power cord. Other equip-
ment in the system should have some
form of isolation to prevent ground loops
and associated hum.