Hi guys, I've got 2 x 12" svc 4ohm Pioneer 160W RMS subs running off a cheap 2 x 120W RMS 2 ohm stable amp and a 4 x 75W RMS (2 X 100W) 2 ohm stable amp running the front (6 1/2" splits and back 6" speakers. Does anyone know the best way to wire up the subs, should I use the 4 channel amp for the subs? I don't care if the rear speakers run off the head unit as they are low quality speakers so i've got them turned down anyway.