Bose subs + 4 speakers...which head unit...weird power problem
 

I am looking for a head unit with sub control for the bose sub, and use four speakers in my touring. Can you splice the wire into the av connection to work with audio-outs. And my current head unit has a weird problem, where it can be turned on without the key on ACC; and when using the lighter outlet, the head unit would turn off... is the h.u. some how running off of power from cig. light outlet???