Question about Rockford Fosgate P3001 Car Audio Amplifier

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Bass control stopped working

In my attempt to re-connect the ground wire to back of the amp, it grazed the positive connection causing a big spark. After re-connecting the bass control light is on but moving the controller has no affect. Have I messed up the controller or worse yet have I screwed up something inside the amp? The bass sound appears to be locked up at the minimum.

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On rockford amps, the bass control knob needs to be connected to get the maximum output (+18 db gain i believe). If you did this to the power wires, then yes, you may have at least damaged the bass control knob. Try replacing this to see if you get all of your gain back. If not, then you have damaged something inside the amp...maybe a capacitor or power supply inside. If that's the case, you'll need to get the amp looked at by an electronics repair technician or local stereo shop.

Posted on Aug 11, 2008

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My hifonics am 1208d is sparking every time I connect the ground wire! Seems that the ground connection on my amp has mysteriously turnt to a positive? Please help, how can I diy fix the amp my self? I...


Try reversed the connection, hang the positive supply together with the ground. Then connect the ground first before the positive supply. If the spark is still there then you are confirmed that you have a short on the unit. Fixing is not DIY because it is quite technical. I rather suggest to send it to a repair shop to isolate the shorted parts. A series of test will be perform to locate where the short come from.
Please rate my advice.
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It's possible that something failed and caused the cap to melt out of the board. The failed component may have caused the fireworks inside the amp. 

If you're new to repair and want to lear more, visit the following site. If you have questions, feel free to ask.

Basic Amplifier Repair Primer
http://www.bcae1.com/repairbasicsforbcae1/repairbasics.htm

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