Buzzing in speakers after audio overhaul

[MTMoyers]

So, I recently redid like all of the audio stuff in my car and after my install, I noticed a buzzing in my speakers. The buzzing gets louder when I rev the engine. There's also like a new like whiny-ish noise when I rev (sounds like it's coming from the engine.) I'm thinking it's one of the RCAs maybe being cheap or something. On the left side of my car I have 3 sets of RCAs, 1 remote wire, and 2 speaker wires. On the right side I have my power wire and 2 speaker wires. I thought maybe the power wire was interfering with the speaker wires on it's side, but the buzzing is coming from both speakers. Anyone have any thoughts of what it is or what I could do to fix it?

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[Kangaroux 5,000+ posts]

What kind of deck do you have? I think it's pioneer decks that have the problem of RCA's not being properly grounded. What you're hearing is alternator whine.

Somewhere on here there's a tutorial on how to properly ground the RCA's

 

[MTMoyers]

I've got a JVC. KW-AVX830. It's a double din receiver. Would grounding the RCAs help since it isn't a Pioneer?

Also, how bad is it when an alternator does whine? My amp is rated at 1000W RMS, but with my gains set the way they are, I doubt I'm pulling more than 600W. Maybe a bad connection to the battery?

 

[akheathen Premium Member]

sounds like a bad ground somewhere, either at the amp that is whining, or the head unit. possibly the body has a bad ground as well, from the battery/ engine. test all of them with a meter, and visually check. is the ground cable grounded to bare metal? once you have checked these, ohm out your rca's and the rca shield on the back of the hu with ground/ body of the head unit.

 

[MTMoyers]

The ground on my amp is bolted underneath my back seats. So I guess the chassis. Everything works and hits clean and hard, the buzzing just bothers me.

 

[akheathen Premium Member]

The ground on my amp is bolted underneath my back seats. So I guess the chassis. Everything works and hits clean and hard, the buzzing just bothers me.

you contradict yourself. take the ohm readings. that under-seat ground might not be getting full contact