Alrite so im having engine feedback noise(high pitched noise) throw my speaker and wanted to kno wif there was anything that car be done like a ground loop etc...and to see if anyone could perform that task for me.Thanks

 

more info? aftermaket radio? amps?

 

yea i have a avic-d1(i know its old)and i have a jensen 760 watt amp on my highs and a sony xplode 1200 watt on my sub which are kickers cvrs

 

Likely the good ole pioneer RCA issue. Simple fix is to wrap a wire around the outside of one of your RCA's(on the metal end) then ground that wire. Proper fix is to open up the unit and replace the microfuse, but either way will work.