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zis forzombie Posted on Apr 20, 2007
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Amplifier does not turn on anymore.

I recieved a Power Acoustik amplifier for Christmas a few years back. When I first set it up, it worked great. About three weeks later, however, it triggered the red protection lamp. For a while, it would work if you jostled the remote line. Now, nothing seems to turn it on. If you unplug the RCA cables, the light turns off, and the amp is completely unresponsive. (The light is supposed to be green when active) Also, this "Red Light" issue only applies to pre-amped RCA outs. If you plug it into the standard RCA outs, nothing happens. Also, disconnecting the subwoofers has absolutely no effect either. The Stats: RECIEVER: Originally, I had a Pioneer Premier DEH-P560MP Then, I temporarily replaced it with a Dual XDM6810 with Preamped RCA outputs. AMPLIFIER: Mosfet, Bridgeable, Crossover, HPF/LPF, Bass Boost, 2ohm Stable SUBWOOFERS: Dual XNBP12D 1100W Bandpass Sub System; 4ohm impedence Any information would help. The tech support at Power Acoustik simply told me "Either your ohm rating is off, or your amp is junk". That suuuure does help. I've toyed with the idea of crackin open the case and hotwiring over the power protection circuit.... But something makes me thing that that's a horrible idea. Haha. Thanks.

2 Answers

Mike Duncan

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  • Posted on Apr 23, 2007
Mike Duncan
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You cannot wire "over" or "around" the protection circuit. Even if you know enough to know what the circuit was, you shouldn't bypass it and force the amp to turn on. It is doing exactly what it is supposed to do, which is protect the amp and your speakers from catastrophic failure and possible fire or damaged speakers. If you are bridging your speakers then you may have put too much load on your outputs and fried them. If you put two 4ohm speakers in parallel, you will have a 2ohm load and if you then connect that 2ohm load to a bridged amp, you will be subjecting each of the bridged output channels to a 1ohm load because they will share that 2ohm load. This of course will blow the outputs and it usually takes about one month to do it. In your case it sounds like it only took 3 weeks. The long and the short of it is that it is now time to take your amp to the shop for some repair time. Sorry that it's not good news.

A

Anonymous

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Could not get a manual for you but did get the follwing specs. Hope they help.

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If the amp goes into protect mode, it's likely due to shorted output transistors. To eliminate other possible problems, read through the following page:

Amp in Protect Mode - Troubleshooting

If the problems are not with the wiring, follow the link at the bottom of the page to the Amplifier Repair Primer page.

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