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Expert: - 12/8/2008


Question
My question is, why is it that before my capacitor used to read a normal voltage, and now it reads higher at 15 volts and every time i start putting the volume up my sub woofers shut down, then the amp reads overcurrent/protecting, at first I thought I had a shot amp, but now I bought a Rockford Fosgate amp and it's still doing the same problem, any ideas on what can it be?

Answer
I suspect either of these:

ONE:  A bad ground.  Make sure the ground wire to the amp is on solid metal and a tight screw/bolt holding it down.

TWO:  A short on one of the speaker lines or a shorted voice coil in one of the speakers could do this.

Try removing the speakers from the amp one at a time and see if you can get it back to normal operation (you may have to recharge the power cap).

Let me know if there is more to the story.

Hope this helps.
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Cleggsan

Expertise

Audio Design Engineer; systems, loudspeakers, cd/dvd players, etc. I am knowledgeable in all high end audio equipment and installations. MAKE SURE YOU GIVE A MAKE AND MODEL NUMBER AND CAR IF IT IS AN AUTO QUESTION. Note: I am getting some who ask good questions that take a lot of time to research but then the questioner fails to read the answer. Please don't ask questions unless you are seriously looking for an answer. If you find an answer to your question otherwise then let me know with your reply. Thank you.

Experience

Have been associated with audio design, standards, testing and component systems for over 40 years.

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Life Fellow Member of Audio Engineering Society Life Senior Member of Institute of Electronic and Electrical Engineers

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Review technical manuscripts for IEEE Spectrum Write occasionally for high-end audio publications

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BSEE/MSCS/MBA

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Past Employee/advisor to several well known audio products manufacturers

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