Sony SA-W2500 home theater powered active subwoofer. The sub is in good shape and fully functional, the amplifier section is rated 100W with a 10" woofer in front. I will have it hooked up to the garage stereo so you can hear it before buying! Dimensions - 11-7/16"W x 13-3/4"H x 16-3/8"D. The sub comes with the original factory box. The price is $60 firm, not negotiable!