HSU research STF-1 subwoofer for audiophiles -MSRP $360

Like new!! Purchased for $360 The STF-1 has a downward-firing 8-inch woofer and a 150-watt amplifier and is available in textured black. As budget subs go, it's nearly a full-size model, measuring 19 inches high, 10 inches wide, and 16 inches deep. Instead of the usual cheap rubber feet, Hsu includes a decent set of adjustable cone feet. The back panel hosts the unit's volume and 30Hz to 90Hz adjustable crossover controls. Then again, we're sure most STF-1 owners will select the crossover bypass option and let their receiver's internal bass-management system provide the crossover function. Connectivity options include heavy-duty speaker-level inputs and outputs, plus a mono line-level RCA input. The STF-1 can operate on either 120 or 240 volts, and the sub has a 7 year warranty! A particularly robust MDF cabinet contributes to the STF-1's healthy 43-pound heft; we'd rate the baby Hsu's build quality right up there with that of many $500 subs.