features overview 3
front panel
switches and controls
1AC Power Switch/Circuit Breaker
The CC Series amplifiers have a combination AC switch/circuit breaker on the front panel. 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.
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.
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2Input Attenuators
Whenever possible, set the attenuators fully clockwise to maintain optimum system headroom.The input attenuator controls (one for channel A, one for channel B) located at the front panel adjust gain for their respective amplifier channels in all modes. See the specifications at the end of this manual for standard voltage gain and input sensitivity information.
indicators
CCSeries amplifiers feature four front panel LED indicators per channel:ACL™ (Automatic Clip Limiting), Signal,Temp, and Active.These LED indicators inform the user of each channel’s operating status and warn of possible abnormal condi- tions.
3ACL LED
A channel’s ACL LED will light at the onset of clipping. If the LED’s are flashing quickly and intermittently, the channel is just at the clip threshold, while a steady, bright glow means the amp is clip limiting, or reducing gain to prevent severely clipped waveforms reaching
the loudspeakers. See the Automatic Clip Limiting section for more information. During initial power up the ACL LED will light indicating that the AUTORAMP™ gain reduction circuitry is activated.This will prevent sudden signal bursts when the speaker relays are closed.
4 Signal LED
This LED lights when its channel produces an output signal of about 4 volts RMS or more (0.1 volt or more at the input, with 0 dB attenuation and standard x40 voltage gain). It is useful in determining whether a signal is reaching and being amplified by the amplifier.
5Temp LED
The Temp LED lights to indicate that the channel’s output relay is open, disconnecting the speaker(s) due to an overheating condition. Once the channel temperature has returned to safe operating conditions the LED will turn off, the channel's output relay will close, and the speaker(s) will be reconnected.
6Active LED
The Active LED indicates that its channel’s output relay is closed and the channel is operational. It lights under normal operation and remains on even when the channel is in Automatic Clip Limiting or ACL gain reduction.These are protection features which leave the output relay closed. If the Active LED goes off, there is no signal at the output connectors.
When operating in the bridged mode, both attenuators must be in the same position so the speaker load will be equally shared between the channels. See the section on Bridged Mono Operation for more information and precautions.
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