Front Panel - Crest Audio CPX1500 Owner's Manual

front panel

1
Channel Level attenuators
Two input attenuators adjust level for their respective amplifier channels. In
Bridged Mono and Parallel modes, the channel A attenuator controls overall
signal level (see rear panel mode switch description).
2
Power LEDs (PWR)
These indicators illuminate when the AC mains power is being supplied to the
amp and both channels are operational. If either channel experiences fault con-
ditions, exceeds safe operating temperature limits, or if the mains circuit break-
er trips; both channel power LEDs will be dark, indicating "shutdown". If the
BRIDGE mode is selected, the PWR indicator on channel B will remain dark as
a positive indication of this mode selection.
3
Signal activity LED's (sig)
These indicators illuminate when the associated channel output signal level
exceeds 1 VRMS.
4
GCL Active LED's
These indicators illuminate when GCL compression is taking place in the asso-
ciated channel. With the GCL ENABLE / DEFEAT switch on the back panel in
the ENABLE position, these LEDs indicate clipping is occurring in the corre-
sponding channel. The Crest GCL limiting system will be covered in greater
detail later in this manual.
5
Fan Outlet Grill
CPX Series amplifiers are cooled by a single rear-mounted fan. Cool air flows
over the heat sink and exhausts through the front grill. Make sure this outlet
remains clear to allow unrestricted airflow.
6
Power switch
This heavy-duty, rocker-type switch turns ON the mains power to the amplifier.
When the mains power is applied, there is a 3-second delay in activation of the
unit. This reduces/eliminates the turn-on transients associated with the system
equipment connected to the amplifier and protects loudspeakers.
features overview
3
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