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Preamp not working

My Audio Buddy Preamp is hissing and crackling. One input is not working at all. Through a process of elimination I have worked out the cables etc are OK.
Please advise if it is repairable and if so, an estimate of cost would be great.

Thanks

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Befor we go inside we make cleaning with lubricant contact cleaner from radio shack and apply it over all control switches while you are moving it-apply also in all sockets and put your plugs in it(in-out-in-out).after all above if not pass you have to ask for help from qualified service center.

Posted on Jul 21, 2008

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Preamp Noise


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Hello ZVOX Owner,
The hiss you hear is generated by the analog audio output of the cable box. The best way to eliminate this hiss to use the digital output of the cable box. The preferred way to do this is to connect the digital audio output of both your cable box and your PS3 to the your TV (I presume your TV has two digital audio inputs.)
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My behringer europower EP2500 poweramp has a bad hiss on channel 2 What could this be?


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It sounds like a failure in the preamp stages, but fortunately you can do a lot of troubleshooting externally.

Drive the "power amp input" jack with another source of audio that has some reasonable output... like a small CD player. If this works (no mind the level, just the quality, that will verify if the power amp is OK.

If the power amp is OK, the use the preamp out to another amplifier.

If it is OK, then the Power amp input jack switch MAY be bad, When nothing is plugged into these, the preamp is sent to the power amp by a switch on the power amp input jack.

If you do these tests, you can email me the results and I will give further tests to run.

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Hi KenO2

First thing to check is that the phantom power is not turned on. If you are using a condenser mic, then it should. If you are using dynamic mic, then it will crackle and makes weird noises in the manner you describe. Other than that it sounds like you have a failing op amp in your preamp. This sort of repair work is not expensive(with respect to the outcome). I would anticipate $40-60 to fix it. Trouble is you can replace it super cheap at the moment 45% off for $64.95plus $9.95 shipping from zzsounds

So I guess that it may not be worth repairing, and more a replacement item for that money. If you have a mate with electronics experience, you could just replace the opamps at home for $10 worth of parts.

If you think my advice helped you to work out what to do, a FixYa rating would be great. Cheers

regards
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