I installed a Nakamichi CD 45z, and there is a faint alternator whine noise in the background. I pickedup 2 RCA ground loop isolators and installed them first from the deck to the RCA's going to the Amp.. and then I tried installing them just before the amp itself.

The whine is still there.. no change.

I tried grounding the HU to a different grounding spot but the noise got worse.. it sound the least when I use the stock ground wiring...

The concern is that my previous HU Pioneer 9300 had some alternator whine.. but after installing those ground loop isolators the whine had been erased but after this Nakamichi.. a faint whine crept in...

Any ideas!?

Ugh I dont wanna haveto tear apart my car... to (1) replace the RCAs going to my 4 channel amp with more expensive triple shielded ones.. (right now their double...Scosche type..)
(2) replace amp?

help guys!!


clean sounding stereo :thumbup: noise that creeps in.. :madfawk: