Question about Power Acoustik GOTHIC OV4-600 Car Audio Amplifier

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Protection light comes on

I got this boss ch1200m and the protection light stays on all the time and it dont send music to the sub. i disconnected it a couple times..left it that way for like half hour then connected it back up..but same thing happend..does anyone know what could be the problem, or if the amp is shot?

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  • Perry Babin May 11, 2010

    The amp probably has shorted output transistors. Read through the following page if you're interested in repairing it yourself.



    Basic Amp Repair



    Let me know if you have any other questions.

    babin_perry@yahoo.com

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  • 25 Answers

Its dead the chip inside is fried

Posted on Feb 16, 2009

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1 Answer

Um the power light will flash then the protl. light will flash its all hooked up right but weird sounds coming out my subs.


Disconnect subs from output of amplifier and then turn on car and radio. Does amp stay on or go into protect? If it stays on then there is something wrong with the subs or how they are wired (series, parallel ) to the box and amp. If it still goes into protect then something internal with amp.

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ALL THE WIRES ARE RAN CORRECTLY,THE GROUND IS SECURE UNDER A BOLT UNDER THE SEAT,THE SUBS ARE HOOKED UP RIGHT,BUT THE PROTECTION LIGHT IS STILL ON


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I ran the amp in .5 ohms and it is only 1 ohm stable now the protect light comes on what could it b.


Blown protection circuit at best. Blown power supply and IC's at worst. Send it to a service center for an estimate, educated guess without having it on a bench in front of me $150-200 repair. To test for the possibility that it's not the amp, disconnect speakers and turn power on. If it stays clean, no"protection", check your subs for a shorted voice coil. Hope this helps.

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Disconnect any speaker from the amp then re-power. If it still goes into protection, your amp needs serviced. Shorted output transistors most likely. And check your Sub for shorts as well. If the voicecoil on the sub is burnt, it will short any amp. If you can use a meter, check the resistance on the sub. Hope this helps

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Red light


something is shorted in the circuit, or your subs. unhook the subs first and try it again, if it is still in protect then it is most likely the output transistors.

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