i'm looking to put a single 10 or 12 inch sub on my car, and i'm wondering exactly what i'm going to have to do to do this. i don't know if the 460 head unit has pre-amps(?????), but i'm assuming that if it does, the only major components i'll need are an amp and the sub itself. i'm not too informed on this subject, but if i could get some help i'd appreciatte it.