This is a nice quality Sony SA-WMSP1 Magnetically Sheilded Active Subwoofer. It features a magnetically shielded housing.
Up for sale is 1, brand New Sony SS-WS71 (From the Dav-Hdz235 set) passive subwoofer. Passive means it does not have a power plug that plugs into the wall, and must get power from another source IE: amplifier/dvdplayer. The rated Impedance of this subwoofer is 3 Ohms or 140 watts. The subwoofer Dimensions are 7 7/8"W x 12 ¾"H x 13 5/8"D
KICKER TCVT12 SINGLE COMP. 12 SUB 2OHM (Inv Code: W04). (Inv Code: W04)
2-ohm Solo Baric Sub, Peak power handling 2000 watts, 2006 Model
Experience intense audio with this subwoofer enclosure that features dual 12" subwoofers that handle up to 800W peak power each. The injection-molded SoloKon cones eliminate distortion.
Dual 12-inch subwoofers in a vented subwoofer box.