Help finding interference

[dkmesa 10+ year member]

EDIT: Read Post #9

So I rewired my 4 channel amp in a different location of my car today and ever since I have been getting interference from something. The same thing happened the last time I wired the amp in this location, but I can't diagnose the problem. The speaker just receives a constant audio signal resulting in a buzz from my mids and constant excursion from my midbass. I thought it may be related to the power line crossing the RCAs, but I rewired my RCAs so they are not touching the power wire. Any ideas what could be causing the interference?

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[dkmesa 10+ year member]

Any ideas?

 

[dkmesa 10+ year member]

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[JimJ 5,000+ posts]

Do you have to have the amp mounted there? //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[djman37 5,000+ posts]

So I rewired my 4 channel amp in a different location of my car today and ever since I have been getting interference from something. The same thing happened the last time I wired the amp in this location, but I can't diagnose the problem. The speaker just receives a constant audio signal resulting in a buzz from my mids and constant excursion from my midbass. I thought it may be related to the power line crossing the RCAs, but I rewired my RCAs so they are not touching the power wire. Any ideas what could be causing the interference?

maybe the amp chassis isn't grounded? try running a piece of wire from a mounting foot to the chassis and see if the noise goes away.

It isn't a Class-T amp is it?

 

[dkmesa 10+ year member]

It isn't a class T. Will mounting the amp potentially help me? What is a mounting foot? And by chassis, are you just referring to the amp being grounded?

 

[djman37 5,000+ posts]

It isn't a class T. Will mounting the amp potentially help me? What is a mounting foot? And by chassis, are you just referring to the amp being grounded?

mounting foot, screw hole, mounting hole.

I'd run a wire from the above mentioned hole to your car's metal somewhere and see if that helps your noise. It helped mine.

 

[dkmesa 10+ year member]

I rewired the ground to somewhere that I know is a good ground and the problem persisted. I hooked up the other sub and it went away but the speaks don't get loud at all...Is there a problem with running 2 channels off the subwoofer RCA and wiring one sub to the left channel and the other to the right?

 

[dkmesa 10+ year member]

I am still getting interference in my speakers...like a constant buzzing. I am beginning to think there is something wrong with the car's electrical, because long before I installed the speakers, the radio would be fuzzy for a few minutes after I turned it on every so often. Anyway, I wired the ground somewhere else, I grounded my RCAs, I repositioned the amp in a different part of the car, and ran my power wire a completely different direction and I am still getting interference...Any ideas as to what it could be?

 

[dkmesa 10+ year member]

bump

 

[dkmesa 10+ year member]

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[dkmesa 10+ year member]

up again

 

[dkmesa 10+ year member]

can someone help me out on this? When I switch the RCAs around, the problem is still with channels 1 and 2...does this mean the amp is broken?