What is your volume at when it is really loud? I turned down my gain quite a bit. I also spliced an additional ground directly from the head unit. The wires I used were really thin so the addition of a heavy gushed ground wire helped the most. My whine is gone but I have a random ticking noose when music is playing at low audio levels. Good thing I frequently listen to music at loud levels Haha. I also tried a ground loop isolator and it did nothing. What was your total for the crossovers?