Has anyone who replaced their amp and speakers had a problem with alternator whine? I upgraded to a JL500/5 amp w ith JL components up front and Alpine co-axials in the rear and a JL sub. The installer did not use a LOC because the JL amp said it did not require one. I was thinking of adding A LOC to see if it would reduce the whine, as the amp gains could be set lower. If anyone has any ideas/comments please share them. Thanks Guys.