Crown Audio CTs 4200 Manual Do Utilizador

Yellow LED, one per channel pair, illumi-
nates when the channel pair's Mode 
Switch is set to the “Bridge” position. If 
Mode switch is changed while amplifier is 
powered up, Bridge LED will flash, indicat-
ing that the amplifier must be powered off 
and on to reset the Mode. See Section 6.9.

Green LED, one per channel, illuminates 
when the channel is initialized and ready to 
produce audio output.

Green LED, one per channel, illuminates to 
indicate the presence of input signals 
above –40 dBu.

Red LED, one per channel, illuminates 
when the THD of the channel’s output sig-
nal rises to a level typically considered as 
the onset of audible clipping. The Clip 
Indicator also will illuminate during Ther-
mal Level Control (TLC) or input overload.

Red LED, one per channel, flashes when 
the channel has shut down due to thermal 
stress or overload. If the power supply 
goes into thermal overload, all channel 
LEDs will flash.

Red LED, one per channel, illuminates 
when the amplifier output channel has 
stopped operating.

Front-to-rear forced airflow.

Yellow LED indicates IQ Loop data activity 
(if the amplifier is equipped with an IQ-MC 
module, and connected to an IQ Loop).

Blue LED indicates amplifier has been 
turned on and AC power is available. Indi-
cator also flashes if the amplifier shuts off 
due to an under/over-voltage condition on 
the AC mains.

Amplifier is on when the switch is in the IN 
position.