Page 12 Crest Audio Pro Series Power Amplifiers Bridging Precautions Use extreme caution when operating the amplifier in the bridged mode; as potentially lethal voltage may be present at the output ter- minals. Never ground either side of the speaker cable when the amplifier is in the bridged mode; both sides are hot. If an output patch panel is used, all connections must be isolated from each other and from the panel. If the switch shuts off during nor- mal use, push it back to the ON position once. If it will not stay on, the amplifier needs servicing.
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Also, as an extra precau- tion, have the attenuators turned down during power-up. Operation Modes Stereo Operation For stereo dual channel operation, turn the amplifier off and set the mode select switch to the stereo position. In this mode, both chan- nels operate independently of each other, with their input attenuators controlling their respective levels. For model , the minimum is 1 ohm per channel.
Note: The Model has no mode select switch; it always operates as a dual-channel amplifier. No jumper wires are needed. Output connections are the same as in the stereo mode. Both input attenuators remain active, allowing you to set different levels for each channel.
Power and other general performance specifications are the same as in the stereo mode. Note: Model has no mode select switch; it always operates as a dual-channel amplifier. Bridged Mono Operation Both amplifier channels can be bridged together to make a very powerful single-channel monaural amplifier. Use extreme caution when operating in the bridged mode; potentially lethal voltage may be present at the output terminals.
To bridge the amplifier, set the rear panel mode select switch to the bridge position. Unlike the stereo and parallel modes, in which one side of each output is at ground, in the bridged mode both sides are hot. For proper operation, both input attenuators must be in the same position.
This keeps the load bal- anced between the channel outputs. Note: The Model cannot operate in bridged mono mode; it always operates as a dual-channel amplifier. See the separate section on this model.
Bridged Mono Operation - Model The Model power amplifier is configured so that one or both pairs of channels can be bridged to mono. Always turn off the amplifier before changing operating modes!
Crest Audio 10004
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CREST AUDIO PRO SERIES 10004 Specifications
Crest repair center needed