Muddy sound and extra noise from subwoofer

[J Wikoff]

I have a Rockford Fosgate Punch P3 4ohm DVC 10" sub being run by a Pioneer GM-D8500M amp.

Recently, it's been intermittently muddled and cutting out.

Troubleshooting I've done:
Wiggled all the power, ground, signal connections, no change

Pulled sub from enclosure, connections are good.

Put sub on different amp on shelf system in my house, works fine.

Attached different sub to Pioneer amp: same issues.

Removed signal lines from amp, staticy noise persisted.

Connected different amp to same original power, ground, and signal lines and the sound went away.

Would an internal amp issue create a static-esque noise, or is there anything else it could be that I haven't eliminated already?

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[SMH90]

Sounds like the amp might be on it's way out.

 

[ThxOne Premium Member]

Amp is a good match for that sub. I am willing to bet the amp is on its way out. These things happen.

 

[crsbrn75]

I have a Rockford Fosgate Punch P3 4ohm DVC 10" sub being run by a Pioneer GM-D8500M amp.

Recently, it's been intermittently muddled and cutting out.

Troubleshooting I've done:
Wiggled all the power, ground, signal connections, no change

Pulled sub from enclosure, connections are good.

Put sub on different amp on shelf system in my house, works fine.

Attached different sub to Pioneer amp: same issues.

Removed signal lines from amp, staticy noise persisted.

Connected different amp to same original power, ground, and signal lines and the sound went away.

Would an internal amp issue create a static-esque noise, or is there anything else it could be that I haven't eliminated already?

I recently had the same problem. My issue was that the wiring to remote bass knob had gotten pinched between trim in the console. Obvious drops in volume, sounded like sub was under water at times. Worth a shot

 

[J Wikoff]

Hmm, hadn't thought about the remote knob wiring. I'll give that a try. Thanks!

 

[J Wikoff]

I unplugged the remote knob from the amp. The static was reduced but didn't go away.

 

[Kickstand Premium Member]

I had a similar issue with an amp a long time ago
I think it was a Kenwood but Its was 15-20 years ago so.
It turned out the soldering that held the RCA connectors to the amp board had come loose