first off,ive never heard a good sub in a home enviroment. so i can only compare to the def tech super cube 1 . Without any calibration, i put in armagedon to see if this sealed design would have as much impact as the dt. at first i thought "not much louder) after a while i realised it was much less rumble and way more articulate. i think the def tech was distorting trying to fill this large space at the same levels as the fronts and center, which makes sense to me now. then i put in this years crossroads concert and "thats what im talking about" i can now hear indvidual bass notes as i see them played where before it was like a loud background tone. when i got a new reciever and when i got a blueray player and went to hdmi,i couldnt really tell much of a diffrence, but now im gonna sound like an advetisement" it sounds like i got new speakers and my wife is taping her foot asking who this sonny landreth guy is"