JBL CSS11 10-Inch 150-watt Powered Subwoofer in High-gloss - Black(,1) (Discontinued by Manufacturer) 10", High-excursion, proprietary PolyPlas-reinforced woofer cone delivers more uniform pistonic motion, for deeper, tighter bass Powerful 150-watt amplifier provides the bass output that today's great home theaters and HDTVs should have Floor-firing with FreeFlow port architecture features a computer-optimized flared aperture to eliminate audible port noise Magnetically shielded for video proximity allows for shielded placement on the floor wherever you want, including right near your TV or video display