Question about Crest Audio CPX-900 Amplifier

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Crest Audio CPX-900 Amp

Hello,

The right speaker (Community MVP15HO's) is not as loud and clear as the left speaker. Both left and right volume controls are at the same setting and both green light indicators are on. The sound quality is slightly off and not as loud as the normal speaker. I've tried switching cables, but it stays the same which tells me the cables are ok.

thanks!

Scott

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Check the input signal.switch the cables and see if that changes anything.also check the back of the amp for filters.make sure that they are set the same way.check cables on source coming in to amp.ie-quarters to rca's or rca's to xlr's.make sure amp is not set to parallel inputs or bridged mono.

Posted on Dec 19, 2008

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Crest audio cpx 1500 , one channel stop working ,


The breaker is stuck because there's some internal circuit problem on the amp. Something is tripping it i.e. a wiring short or blown speaker driver if they're connected, or an output transistor has blown.

Fix the problem BEFORE trying to reset.

Switch all off. Disconnect your speakers from the power amp. Switch the amp back on. If it will reset now then you have a wiring or speaker issue. If it won't reset then the problem is something broke in the amp.

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Hello
Switch on your amp, keep its volue down to extreme low, and listen if there is still hum through the left channel or not. If still there is hum, the left side power amplifier section inside the amp;ifier is faulty. If htere is no hum at this state, hum enters thorugh the audio input terminal, and the input wires must be checked for open sheild connection. OK.

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Dan

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1 Answer

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This is kind of an ambiuous question. Are you looking for barrier strip inputs and outputs? Are you looking for 70V output lines? Or are you looking for a standard 1/4" TRS input with either 1/4" or speakon outputs? If you can describe your application requirements, I can provide you with a recommendation.

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No power


These amps are very compact and are not the easiest to work on. If you are not experienced at repair, I would not recommend you start here. Where are you located?

Dan

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