But now we're talking a lot of cash right? i saw some home subs on PE for $600+....

i would assume that with a sub, i could run my current L/R speakers, but i don't know how i could get the sub to connect. mine is plugged into the head unit using a cable with a circle head and prongs in it on each end.

not sure this is going to work out...home audio looked to be a lot more then the car audio on PE.