Hi guys,

I've been trying to rin myself aof a horrible ground loop problem.

amp and head unit grounded to differnt points ( but some potential )

If i connect 1 pair of rcas between amp and head unit all is fine and happy. But as soon as i add the second pair it starts getting alternator whine in the signal.

I currently have a line isolation transformer hanging off the rear rca's and it removes the whine completely, but i would prefer to remove that unit.

Any ideas ?