Klipsch XW-300d Premium Compact 8-Inch 270-Watt Subwoofer (480 Watts Dynamic Power) (Discontinued by Manufacturer) Compact, powerful design anchors a home theater or two-channel system DCS Technology caters to specific bass preferences Front-firing 8-inch high-excursion fiberglass driver delivers hard-hitting intensity 270-watt BASH Digital-hybrid amplifier (480 watts dynamic power) Sealed enclosure for truly deep bass with extraordinary definition