A single center channel speaker timbre-matched to fit any Polk Audio home theater or multi-channel music system;Two 6.5-inch dynamic balanced drives with polymer composite cones;One 1-inch silk composite dome tweeter;Features a neodynium magnet, low viscosity ferro-fluid cooling, and a heat sink on the back of the magnet;All MDF construction and extensive asymmetric cabinet bracing ensure resonance-free enclosures