hello im new here and have read some stuff about alternator whine in amps..
i have a pretty plain dual head unit a crossover 2 amps highs and lows..
my problem is it sounds like im communicating with aliens thru my speakers lol when my rmps go up the whine goes up.. when my car is off but the battery is powering the radio i dont get the sound..

i read alot about uneven grounding of all the components so i ran a 4 ga ground directly to the battery and grounded my head unit crossover and both amps to it.. but still getting the whine.. i even tried one of them ground loop isolators but that didnt work either... ive heard a bad winding in the alt can cause this as well so im trying to figure out if theres anything else i can try before i go replacing the alternator...

i drive a 2005 camry le if that helps any

 

Check the link below:

Noise Prevention

 

nice links dude!

Its very helpful and informative