Yesterday I recieved my brand new, Earthquake Supernova MkIV 15" subwoofer. This thing rocks!! It can move so much air, that that it literally feels like your couch is moving and floating in mid-air! Bass is nice and tight, and while this woofer rocks with music...it really excels with movies. The Earthquake packs a punch and hits you solid not only in the chest, but your whole body. Absolutely incredible...it is able to give you a realism to movies such as Phantom Menace, U-571, and the Last Castle. Watching the Last Castle last night, it felt like Gen. Irwin (Redford) and his band of inmates were literally destroying the Castle in my basement. If you are in the market for a subwoofer, I stongly recommend giving one of these an audition. Eric.