if been able to sit in this beast 2 times, the 2nd was louder to me than the first, for 12 15"s it isn't all that impressive but then again you can't really expect much from their punch series of woofers, but I did enjoy the demo, and others should get one if you have a chance it's a pretty cool show inside.
edit: I just realized they changed out to their new line of punch subwoofers so what I said above might be a bit different after I get another demo of it!