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Old 1st September 2007, 08:42 PM   #1
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Default Clipping and amp power supply

I have an AR S500 subwoofer that is clipping badly at moderate to high levels, I have replaced the driver, and found a good working amp out of a 220 V unit and replaced all the boards except the power supply (of course) with no change, so my problem seems to be centered around the power supply.

This is a Sunfire 500W RMS plate amp with a large toroidal power supply transformer. Should I replace this or the two large capacitors that make up this power supply? I'm no technician.

Thank you!
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Old 2nd September 2007, 04:30 AM   #2
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Your chances of fixing that (even with the schematic), are slim, and none.

Those amps use a dual tracking down-converter (two switching power supplies that track the audio signal).
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Old 3rd September 2007, 12:08 AM   #3
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I found the problem - a capacitor went bad.
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Old 3rd September 2007, 03:53 AM   #4
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An electrolytic in the raw supply, or one of the 6.8F in the downconverter?
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