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Basic Operation
CX Power Amplifiers
2-7
. . . continued from page 2-5
5. UNBAL/BAL Switch
Selects between unbalanced (RCA) or balanced (XLR) audio
input for each channel. Power the amplifier off or reduce sys-
tem volume before changing the setting of the UNBAL/BAL
switch. If the amplifier is connected to a digital controller such
as the MC-12 or MC-8, output levels should be
re-calibrated whenever the setting is changed.
6. GROUND LIFT Switches
When set to ON, isolates the ground connection between that
channel’s audio inputs and the chassis. This can be useful for
eliminating audible hum or noise caused by multiple
grounding paths in the system. When set to OFF, the audio
input is grounded to the chassis. This switch should be set to
ON whenever there is ground noise present in the system.
7. TRIGGER INPUT
Enables the amplifier to be controlled by the MC-12/MC-8 or
other external devices with a 12V DC trigger output. Connect
the trigger output of the external device to the TRIGGER INPUT
of the amplifier, and set the TRIGGER switch on the amplifier to
ON or DELAY. The amplifier will automatically respond when
the external device is powered on and off.
8. TRIGGER INPUT Switch
When set to OFF, the amplifier only powers on and off in
response to the front panel standby button. When set to ON
or DELAY, only the external device connected to the TRIGGER
INPUT can be used to power the amplifier on and off. The front
panel standby button will not power the unit on and off.
(However, the standby LED still functions normally.)
Do not defeat or remove the ground prong on the AC
power cord.This will result in a safety hazard, and will not
reduce audible hum. The GROUND LIFT switches have
no affect on the safety ground of the amplifier.
WARNING