Klipsch KSW-10 10-Inch 225-Watt Subwoofer (Black) (Discontinued by Manufacturer) 10-inch bass reflex subwoofer transforms songs into live concerts and movies into lifelike adventures Provides 55 watts of continuous power (225 watts of dynamic power) K-1070-K 10-inch down-firing fiber composite cone woofer Built-in discrete MOSFET amplifier Accepts LFE, line-level and speaker level inputs