Strange Feedback Issue

tsunam1
10+ year member

Member
Feedback in Right front speaker - only when car is on - only when Subwoofer RCA's are plugged in. When i push on the gas pedal I get a 'squigly' sound - when the engine is running i get a high pitched buzz.

I regrounded the head-unit and the speaker / rca's run on the opposite side of the car from the main power line.

Any ideas?

 
I doubt it has anything to do with the rca's. they are low voltage and low current so little opportunity for coupling.

maybe your sub amp ground.

kent

 
I grounded the RCA's and there was a very slight improvement - barely noticable. Any other ideas? I've tried running the RCA's directly (not hidden) from the head unit to the amp with no improvement.

I tried re-grounding the amp. I'm going to run a new power wire directly to the battery. Do you think grounding the RCA's on the amp would help?

I forgot to mention - the feedback is now in both left and right speakers and you can hear it even when the car is off. There's still a squiggly noise when i touch the gas pedal

 
Ok so i finally figured it out. BOTH RCA's must be running over something causing the feedback. I first attempted to run one RCA through the cabin freely. I replaced one RCA at a time and had the same problem. The strange thing is I only get feedback when both RCA's are plugged in?

This time ran both RCA's freely through the cabin and had no feedback = D

Problem solved though i wasted a ton of time troubleshooting.

 
I doubt it has anything to do with the rca's. they are low voltage and low current so little opportunity for coupling.
maybe your sub amp ground.

kent
They are a low level signal, which means it doesn't take much interference to become a large percentage of the signal being transmitted, which is then amplified, interference and all.

RCAs and related hardware are quite often the culprit when you have an engine whine.

 
Activity
No one is currently typing a reply...
Old Thread: Please note, there have been no replies in this thread for over 3 years!
Content in this thread may no longer be relevant.
Perhaps it would be better to start a new thread instead.

About this thread

tsunam1

10+ year member
Member
Thread starter
tsunam1
Joined
Location
Ontario, Canada
Start date
Participants
Who Replied
Replies
10
Views
753
Last reply date
Last reply from
Kyle!
561786595_18427607485102160_7010259965928918509_n.jpg

just call me KeV

    Oct 9, 2025
  • 0
  • 0
561583216_18427455586102160_8141545757991593433_n.jpg

just call me KeV

    Oct 9, 2025
  • 0
  • 0

New threads

Top