[Bumpin]

I suggest getting an adapter of some sort that will make it have preouts (I dont know what its called).

Its called an LOC which stands for Line Out Converter. You tap into the rear speaker wires behind the head unit and it takes the signal from those and converts them into an RCA output which is on the other end of the LOC.

 

[Bumpin]

LoL no worries. You just said you didn't know what the name was so I thought I would help a brotha out.

 

[Bumpin]

Dude relax you're giving yourself a head ache. Look, the best way to do it, to have different controls for your high's and your sub is to get a good quality head unit that has a bass output. That way you won't need a LOC and everything will sound better.