i would put my temepst against W6's anyday i would rank temepst prolly with the SE model RE subs or w7 jls they in the right box will get very loud and EXTREMLY low and sound very very well doing it.... IMO they are the best sub money can buy for under 300 bucks ( excluding LI subs for sheer output) you will not find a sub with as much out and sq for under 300 bucks as these. i think the LI subs will beat them in spl but they won't in SQ, as for the brahamas they will be as loud and sound better in a smaller box
Mat