Operation Manual; 4.2 Front Panel Controls ; A. Bridge Mode Indicator- Page 12

Operation Manual

CTs Multi-Channel 

Power Amplifiers

page 12

4.2 Front Panel Controls 
and Indicators

Note: CTs 8200 is shown. Some CTs 
4200 features are in different locations.

A. Bridge Mode Indicator

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.

B. Ready Indicator

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

C. Signal Indicator

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

D. Clip Indicator

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.

E. Thermal Indicator

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.

F. Fault Indicator

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

G. Ventilation Grille

Front-to-rear forced airflow.

H. Data Indicator

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

I.

Power Indicator

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.

J. Power Switch

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

Figure 4.1  CTs 8200 front panel.

4 Operation