Thanks for the input but the psa sub is on it's way. I think this sub will give thunderous bass with good control and punch for music! and it's getting excellent reviews. one of the guys who started psa was the v in svs subs,and is a guru of sub tech.I got the the psa for 750 shipped, I don't think I can touch a sub of this quality brand new, used maybe but not new. 1 inch mdf instead of 3/4 550 watts 15 inch driver = 72lbs of BOOM!!