Front Panel

CLIP			CLIP	PL	7001
SIGNAL			SIGNAL		7001
PROTECT			PROTECT
ACTIVE	CH A	CH B	ACTIVE
-10	-6	-10	-6
	-3		-3	PROFESSIONAL POWER AMPLIFIER
-15		-15
-30	-1	-30		-1
-30		-30
-80	0dB	-80	0dB

	1. Rack Mounting Ears.	Never try to hold the
	Two front panel mounting holes are provided on each mounting ear.	circuit breaker/power
	2. Rack Handles.	switch in the “ON”
	2. Rack Handles.	position if it won’t stay
	Rack handles are removable by removing screws on back of rack ears.	position if it won’t stay
		there itself!

3. Fan Outlet Grills.

PL Series amplifiers are cooled by two, rear-mounted fans. Cool air flows over the heat sinks and exhausts through the front grills. Make sure these outlets remain clear to allow unrestricted air flow.

4. AC Power Switch/Circuit Breaker.

PL Series amplifiers have a front-panel combination AC switch and circuit breaker. (No fuses are used.) If the switch shuts off during normal use, push it back to the “ON” position once. If it will not stay on, the amplifier needs servicing.

5. Clip LED.

Illuminates at the clipping threshold. Continuous illumination also indicates that ACL (Active Clip Limiting) protection circuitry is engaged.

6. Signal LED.

Illuminates to indicate that a signal (above a minimum threshold) is present at the amplifier input, and that the signal is being amplified.

7. Protect LED.

Indicates that the channel is in Protect mode (speakers disconnected by output relay).

8. Active LED.

Indicates that AC power is connected and the amplifier is turned on.

9. Input Attenuators.

Two input attenuators adjust level for their respective amplifier channels. In Bridged Mono Mode, both attenuators are used to control signal level and must be adjusted to the same setting.

Page 6	Crest Audio PL Series Power Amplifiers
	Models PL3301, PL4601, PL6001, PL7001, PL8001, PL9001