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BACK PANEL FEATURES
MAINS POWER SOURCE (6) 120 V products only
The CS 3000G is fitted with a single heavy-duty #lO AWG
3-conductor
line cord and a 30 amp T/P AC plug with
A
a large ground pin. It should be connected to an independent mains circuit capable of supporting at least 30
amps continuously or greater. This is particularly critical for sustained high power operation. If the socket used
does not have a ground pin, a suitable ground lift adaptor should be used and the third wire grounded properly.
Never break off the ground pin on the CS 3000G power amplifier. The use of extension cords should be avoided,
but if necessary, always use a three-wire type with at least a
#lO
AWG wire size. The use of lighter wire will
severelylimitthepowercapabilityofthisamplifierandcouldcausefireorelectricalshock.Alwaysuseaqualified
electrician to install any necessary electrical equipment. To prevent the risk of shock or fire hazard, always be
sure that the amp is properly grounded.
GROUND LIFT SWITCH (7)
This switch is used to disconnect the CS
3000G’s
“signal ground” (both input and output) from the “chassis ground.” Chassis
ground is the chassis itself, which is electrically grounded through the rack mounting screws to the external rack system and
through the mains line cord via the large ground pin to the mains ground. It is often advantageous to “lift” the signal ground
from chassis ground to eliminate a “ground loop” which has caused unwanted ground current in the signal cables between
the external preamp and this power amplifier. Such conditions can create excessive hum levels in the power amplifier output
and render the system useless in low level applications. In this case, “lifting” the ground should solve this hum problem.
Ground lift is selected when the switch is in the right or “LIFT” position. If lifting the ground does not eliminate a particular
hum problem, then we recommend you defeat the ground lift feature.
Note: Using this ground lift feature still leaves the chassis itself grounded electrically through the mains line cord. Having
the chassis grounded avoids any possibility of an electrical shock or a fire hazard. This ground lift feature should never be
confused with the practice of “floating” the large ground pin at the AC mains receptacle to eliminate a ground loop. Floating
the ground pin on any electrical equipment is just asking for trouble!!!
SPEAKER OUTPUTS (8)
A
Each channel
SpeakonO
connector and
5way
binding post speaker output terminals are provided. All these
outputs are in parallel, hence the speaker connection cables can be terminated with
4-pin
Speakona
plugs,
banana plugs, or stripped wires for use in the binding post terminals. Care must be exercised to assure correct
speaker phasing.
5