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post #1 of 3 (permalink) Old 12-21-2005, 12:48 AM Thread Starter
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Join Date: Mar 2003
Location: Greenville, Texas
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Need help with amp.

I have an old school PPI-4200M 50W X 4, running front and rear doors in my Tahoe. MB Quart comps in each door. Problem is the right front channel keeps fading in and out. This is an old amp, but I need to get it fixed. Anyone know a reputable electronic guru that can fix this amp?
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post #2 of 3 (permalink) Old 12-21-2005, 07:32 AM
EW
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I can get it fixed but it will be approx $80-100. Have you switched RCA inputs or speaker wire outputs to narrow down the problem?
4200=OLD
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post #3 of 3 (permalink) Old 12-21-2005, 10:28 AM Thread Starter
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Quote:
Originally Posted by EW
I can get it fixed but it will be approx $80-100. Have you switched RCA inputs or speaker wire outputs to narrow down the problem?
4200=OLD
I think the problem is on the input side. Might be the RCA's, gains-set screws, or the switch that enables 2 inputs instead of the 4. Hate to get rid of the 4200, I have one in both of my cars.
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