Ever heard of Hsu Research? Dr. Hsu is a sub guru and has a sale on the STF-1 FOR $254.00 PLUS $20.00 shipping. Taken from the Hsu website:
Industry Reviews
“Sensational sub...31.5 Hz...106dB....easily surpassed the $500 NHT SW10...as well as the $600 Velodyne CT-120...and was superior to a $500 Axiom EP-175...had no trouble eclipsing the performance of the pint-sized, $995 Sunfire True Sub Super Junior...”
— Howard Ferstler, Sensible Sound (Sept/Oct 2004)
“Hsu's STF-1 is one impressive little subwoofer. It went plenty low for true home theater action, with meaningful volume all the way down to 25 Hz — a lot more than I expected. It wasn't boomy yet had me running for cover during the scene in The Italian Job when the armored truck blows through the pavement.”
— Daniel Kumin, Sound & Vision (Oct 2004)
“The Hsu Research STF-1 is one hell of a $299 subwoofer...the STF-1's robustly deep bass power was impressive, and it was capable of dishing out low-frequency effects like a much larger subwoofer.”
— Steve Guttenberg, CNET (April 2004)
“The STF-1 is a total overachiever. It produced louder, cleaner, deeper bass than something this small and inexpensive has any right to.”
— Jeff Van Dyne, Home Theater Sound (July 2004)
Here is a link:
http://www.hsuresearch.com/products/stf-1.html
I have the Hsu "Big Dawg" VTF-3 HO Turbo, and it's an excellent sub. I think its on a mission to tear my foundation apart
Good Luck, and may the bass be with you!