i just got done installing a complete stereo system for my 350z. i replaced all speakers and wiring. installed a box with 2 10" and 2 amps. it sounds great except for a high pitch wine that gets louder with the rpms of the engine. what do i need to do its starting to bug me out

 

"Alternator whine"

 

you can try what dave079 said about running your rca's seperate from your power cable (which does work) or you can try grounding your rca's. I know it sounds wierd but b4 i had my z i had the same problem in my civic and i grounded the rca's, by taking a shielded wire (anything will do, leftover remote turn on or even speaker cable) and connected it to the edge (where the metal is showing) part of the rca (where it connects to the amp) and then grounded the other side. i know it sounds ghetto but it worked for the whine with the radio and my xbox/video input on my pioneer deck.......just an option