Ac Power Connection - Audio Research VSi75 User Manual

9
Connections

AC Power Connection

It is essential that the amplifier be connected to a wall AC power receptacle,
or a similar heavy-duty source. If it is connected to convenience receptacles
on preamplifiers, etc., the full sonic capabilities of both the VSi75 and the
preamplifier will be compromised.
For the very best sonic performance, the VSi75 should be connected to its
own AC power circuit branch, protected by a 15 or 20 amp breaker. The
other audio equipment should be connected to a different power circuit
and breaker. Avoid the use of extension cords. If they must be used on a
temporary basis, use 14-gauge or heavier cords.
The VSi75 utilizes a compatible grounding system that generally does not
require a "ground lifter" adapter plug on the AC power cord to minimize hum.
The 14-gauge power cord supplied with the VSi75 has a standard three-
prong grounding plug to provide maximum safety when it is connected to
a grounded wall receptacle. If there is any question regarding the safety
of grounding procedures, be certain to seek competent help with the
installation.
If electronic crossovers or other AC powered equipment are used with the
VSi75 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 equipment in the system should have some
form of isola tion to prevent ground loops and associated hum.