170db's from 1 15" sub?!. Firstly how big is this car, because you probably wouldn't be able to fit more than two in it.
Also, how much are they rated at, because the amount of power needed to power this 15 must be enourmous, which probably restricts the amount of subs they can have in one car.
Just to be nitpicky, is there such thing as a punch HX2, because I thought that the punch series was named HE2, and the power was called HX2, I may be wrong, I would have to look it up to be certain. It uses 12 power series subs. They can really take some abuse, and their fvcking HEAVY!!!