Wow, i just bought this off ebay(can't believe for how cheap). I was a little skeptical because i have used the older model CMP subs with the foam surround and they were very good. This sub is a tad boomier in my install, but not much at all, a good EQ would get rid of that. Anyway, this is one of the most musical sub's i've heard in a long time. I'm feeding it about 650 watts from a Reference 700sx in 1cube sealed. I think this sub will keep me happy for a long time! No distortion, great extension and it blends beautifully. Anyway, all you guys looking for SQL with more of a lean to SQ, lok for these on the net or Ebay, they can be found a lot cheaper than the $380 they used to reatail for. You wont be disappointed.