coolone 
Never ran across anything like this...
Installed a new Kicker 4 Channel amp, ran RCA cables, separate speaker wires to the component speakers up front (Boston Accoustics) and of course the Infinity Kappa's in the rear. A 4Ga. Wiring install with a .500uf capacitor. Head unit is a Kenwood, never totally happy with it limited controls but no problems with it either.
ok, so... I hooked up the rear speakers and its good, did same for front and the unit spazzed out. Kinda freaking a little bit. So, I ran a separate 4Ga ground to the amp (about 1') instead of sharing the connection on the capacitor. Still no good. Amp was clipping when it spazzed and there was high pitched squeal, and afterwards there's no bass at all from reads if I hook them back up. Speakers are ok as I've removed the connections and retired it to the head unit and they work fine.
My thoughts are a serious ground loop or bad ground totally with the head unit as I've grounded everything in the rear well. I will be running a separate ground to the head unit later to see if that cures the issue. Just wanted to see if anyone has thoughts on this?
thanks in advance : )
