Amazon.com: Powered Subwoofer, Konex 12" Woofer 300W Powered Active Subwoofer, High Connectivity, Low Impedance Inputs & Line Input, Standby Mode, for Studio & Home Theater, Black : Electronics
Infinity BassLink Powered subwoofer: 200 watts and a 10" sub at Crutchfield
Rockville RW10CA 10" 800 Watt Slim Low Profile Active Powered Car Subwoofer Sub
Adam Professional Audio Sub7 Active Subwoofer for use SUB7-PRO
Mirage Nano S8 Small 8 Inch Powered Subwoofer System
BESTISAN Powered Subwoofer, Deep Bass Subwoofer, Down Firing Sub in Compact Size, Easy Setup with Home Theater System, TV, Receiver, Speakers (RCA Cable Included, Black),SW65C - Yahoo Shopping