OK, so I've had this problem forever and can't seem to crack it or find the source of it. This is what happens, i can hear my alternator whine through my speakers...gets higher pitched as i rev. I can put the volume to 0 and it will play just as loud. I also hear some of my electronics such as when i'm closing my sunroof, or putting on my blinkers through my speakers too. Here are all the things I've tried, and if you have any suggestions at all or any way of fixing this please speak cause i'm all out of idea's.
Tried...
Ground Loop Isolater
Noise Filters
Different Head Unit
Power Wire's On one side, Speaker wire and RCA's on other side
Checked to see if Headunit and Amps were grounded With a Meter (They Are)
If you have any questons on the equipment i have, Its all listed in my sig. Thanks