The STF-1 is our most budget sensitive subwoofer to date, but that doesn't mean its a push-over. It has a high-headroom amplifier and accurate driver that exceeded the expectations of even Dr. Hsu. The narrow enclosure hides easily in a corner or behind a couch. This subwoofer represents our biggest bang for the buck. It's the easiest way to own a HSU "true subwoofer."
STF-1 Frequency Response Curve
CEA 2010 Measurements (1 Meter, Peak)
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)
Read More Reviews
"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)