Is yours doing the same exact thing mine is? I've never heard of alternator whine just comming out of no where, it's someweird stuff.lol
I was thinking the same I will just run a ground to the batt and see if that's a fix. If not I will ground the rca's. It's raining here soo no glassing today, I guess I'll just do the fun stuff, troubleshooting.lol
I just hooked up an amp on my mids and highs and i'm getting the same thing. Does yours get louder as your rpm's get higher?