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p.11
features overview
3
front panel
1
Rack Mounting Ears
Two front-panel mounting holes are provided on each mounting ear.
2
Channel Level attenuators
Two input attenuators adjust level for their respective amplifier
channels in stereo and in parallel modes. In Bridged Mono mode, the
channel A attenuator controls overall signal level for both channels
(see rear panel mode switch description).
3
Protect
This Red LED indicates that the amp channel is in Protect mode.
During Power up, the amp briefly goes into protect mode in order
to prevent any loud spikes from being fed to the speakers. After a
few seconds the amp comes out of protect mode and is ready for
normal operation. If the amp stays in Protect mode, this indicates
that there may be a problem internal to the amp. If the amp goes
into Protect mode during operation this indicates that either a
problem has developed internal to the amplifier or the amplifier is
being over-stressed due to an over-current (short circuit or a load
impedance below the operating range),or thermal condition. In this
event, the amplifier should be switched OFF, and the load connections
checked for shorts and proper load impedance. If overheating is
suspected, allow the amplifier to cool and check that the airflow is
not impeded.
4
ACL / IGM
This Red LED illuminates when either the ACL or IGM protection
circuitry is engaged. See Section 6,Tourclass Protection for more
information on these Crest-exclusive features.
5
-24, -18,-6, 0dB
The first three LEDs (-24, -18,-6,) are Green and the last led, 0dB is
yellow. These LEDs respond to the incoming program material as peak
meters. Under normal operating conditions the Green LEDs illuminate
with the dynamics of the program material and the Yellow LED flashes
during the loudest peaks.
6
Signal
Green LED varies in intensity in response to signals below -24 dB.
7
Active
Green LED illuminates when the amp is on to show that the channel
is active.
8
Fan Outlet Grill
CD 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.
9 Power switch
This switch turns the amp on and off.If the amp doesn’t turn on when
the switch is in the ON position, check the circuit breaker on the rear
panel.
The power only breaks
one side of the AC
mains. Hazardous energy
may be present in the
enclosure when the
power switch is in the off
position.
a