Polk Audio DSW Pro 600 Subwoofer - $250 (novato)

Looking for bass you can hear and feel? The Polk DSW PRO 600 fills your room with deep, solid lows, thanks to a 12" woofer and potent 250-watt amplifier.
This advanced subwoofer features Polk's exclusive Feed Forward™ technology, which reduces audible distortion without limiting volume.
You get quick, precise response throughout the sub's entire frequency range, even at ground-shaking volume levels.
The black subwoofer is scratched, but the sound is solid.
Place in the corner of a family room or living room, and be prepared to feel the viewing experience.