Probably could have gotten closer to 150 with more power. Considering its a 22" sub, supposed to be, according to MTX, "The biggest, baddest, loudest" sub ever, it isnt that good. Give me 2 RE XXX15's let me see what I can do with them with less power and less money... Hell, even 1 XXX. I don't know anybody's posted numbers on the new XXX's. I would guess you could pull 145 with 1 RE XXX 15" easy... at 25-30hz