I have heard one. They have a LOT of output. If you are looking for a very beastly sub, the tumult will do the trick. Weighs about 56lbs, and has 33mm of Xmax. Also, it has pretty good power handling. But I wouldn't run one above the suggested power rating.has anybody heard a 15" AA tumult? and what could one of these do in an large suv in a ported box?