To the guy that asking about the RES, how much power do you want to run? TheXXX are a monster subwoofer and won't move unless you apply a lot of power to them. They are a good SQ and SPL sub but not used much in comps. I would suggest the SE or the HC model. Both are excellent subs and i have tested with both. The SE is the better of the HC and SE. The HC didn't offer much more over the SE and the price was to much for such a little difference.