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features overview 3
front panel
1Rack Mounting Ears
Two front-panel mounting holes are provided on each mounting ear.
2Rack Handles
3Fan Outlet Grills
Pro II 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 airflow.
4Signal LED
A variable-intensity LED that illuminates to indicate that a signal (above
a minimum threshold)is present at the amplifier input,and that the sig-
nal is being amplified.
5Input Attenuators
Two input attenuators adjust level for their respective amplifier chan-
nels. In Bridged Mono mode, the channel A attenuator controls signal
level.
6Status LED
A bi-color LED.When green, it indicates that AC power is connected
and the amplifier is turned on.When red,the channel is in Protect mode
(speakers disconnected by output relay).
7ACL LED
Illuminates at the clipping threshold. Continuous illumination also indi-
cates that ACL ACTIVE CLIP LIMITING protection circuitry is engaged.
8AC Power Switch/Circuit Breaker
Pro II Series amplifiers have a front-panel combination AC switch/cir-
cuit 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 ampli-
fier needs servicing.
note—all LEDs are one per channel
Never try to hold the
circuit breaker/power
switch in the on-position,
if it won’t stay there itself!
a