I got 2 6x9s in my trunk that are hooked up to my amp, each speaker is on it's own channel and each seprately grounded to the top of the trunk, i've grounded everything! And it's still buzzing, the speaker stores said it dose that because it has a bad ground. I hooked up one of those devices that are supposed to eliminate the rpm buzzing sound and that didnt work eather (what a waste) so I took that out.
I'm running my front door speakers off my deck and it dosn't buzz. Wats the deal here? What causes this interferance(crosstalk?) when I amplify my speakers it amplifys my engine noise, how do I prevent it. thanks.
Justin

 

where is the power cable in relation to the signal rca cables. If they are close together you might try running them so they dont touch other wise try a new ground point i dont get what you mean by the speakers have there own seperate ground why would you ground the speakers just the amp should be grounded

 

"speakers have there own seperate ground why would you ground the speakers just the amp should be grounded"

Yeah I didnt think it would work my little sisters boyfriend said i should do that just for extra ground, so i gave it a shot cause i tried everything else. Bah

Thanks ill try re route my rca'z cause they are running with my power cable, they must be picking up the noize that way.

 

Idont think you seperately grounding them was the problem its the fact that you ran your rca cable with your power wire. My rca cable is ran on one side of the car and the power wire on the other.

 

grounding speakers to the top of the trunk???
ground them to the amp the way theyre supposed to be.

 

yeah, you aren't ever supposed to chassis ground a speaker. take that ground off of there and just keep it grounded to the amp on it's specific channel.

 

like every one else has said, you need to run your RCA cables and power cable down opposite sides of the car. If you do not they can pick up 'noise'. If you have done this and you are still getting noise make sure no wires are touching that go to the amp, and if that does not work you can put in a bosch relay and that should knock it out.