Shorted a RH front speaker, now there is no output from RH channels at all

Hi, In our boat, a wire running to the Front RH speaker, was pinched in a steel on steel joint. The wire was cut thru and earthed on the frame, subsequently the RH channel (front and rear) is no longer working, the left works fine. Both speakers are also stuffed, when connected to the RH channel the magnets on the back of the speakers get hot. Is this fixable, or have we destroyed it? (BTW, we've already made changes to prevent the pinching happening again!) thanks in advance, Steve in Australia

Steven Hurst Jun 17, 2007

thanks, that is very helpful, but how would I test the mosfets? Do you have any idea where I could get a circuit diagram for the amp?

thanks,

Steve

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125 Answers

The output stage of the amplifier (RH channel) was probabla damaged from the grounded cable. The heat in the speaker means that the coil (d^speaker) is recieveng DC power from the damaged amplifier. Audio amplifiers are not special and can be fixed. In many cases, the output stage is a power MOSFET or a power audio amp IC. The only issue is the availability of the parts in your area.

Posted on Jun 14, 2007

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Shorted a RH front speaker, now there is no output from RH channels at all