Bose VCS-10 Center Channel Speaker (Black) (Discontinued by Manufacturer) Compound loaded drivers optimize low frequency output for rich, cinema-like dialogue from a small enclosure Two flared ports help reproduce bass with no audible distortion Compatible with surround sound receivers rated from 10 to 100 watts/rated 4 to 8 ohms Electronic protection circuitry prevents the speaker from being over-driven, offering increased reliability Magnetic shielding prevents interference with your television