Which Rel subwoofer

Xti-16,

I listen very loud so that is why I feel I need more power. If I listened at a low level I would have enough power.My Amp is a Audio Research VT-100MKIII.

Nice amp :)

Before I spent that much coin on the REL-328, which really just adds a sharp spike at 45 Hz, I'd give a hard look and listen to the REL Fathom F110. It's not much more money, and can be had for well under list. The Fathom goes lower, plays louder. integrates easily. and has a flatter, more extended response. The flatter, wider curve makes it easier to integrate.

Johnnyb you mean the JL Fathom F110. Yes the JL subs are special I went from the REL Stentors to a JL Fathom F113 and its faster, goes lower and has less distortion than the REL ever had. Plus no issues, the JL has worked flawlessly where I had reliability issues with the RELs.

BTW i have an upgraded McCormack 225/RLD-1.