hey guys i installed a ALPINE AMP with a JL stealthbox with my Pioneer headunit. I have a small whining noise coming from the radio/speakers? When I turn the A/C it gets worse what is my problem? bad pioneer headunit? positve wire is on the right side of car and the RCA cables are on the left of the car.

any help is appreciated!!!!!

 

Does it get worse as the engine RPMs increase?

 

yes!!!

 

sounds like a ground loop, caused by poor grounding of the headunit and/or amp.
take a look at this link

 

not sure if its mentioned in the link posted by oth, but you can wrap bare wire around your RCA outputs on the back of the headunit and ground it to the chassis of the HU. should take car of your noise. the bare wire should touch the metal part that you plug the RCA cables into. i currently have this done on mine cause im too lazy to send it back to get the fuse replaced.