Acoustically inert MDF cabinet, finished in black. Slim tower design conserves floor space, occupies less than one square foot. Polk Audios exclusive Dynamic Balance polymer composite driver for smooth wide-range response with low distortion. 3/4" silk dome tweeter with neodymium magnet for clear, detailed highs. Rear-firing bass port for high efficiency and powerful bass response. Acoustically inert stamped driver baskets and butyl rubber surrounds for high performance durability. Anti-diffraction grills minimize grill diffraction for spacious, three-dimensional imaging. Magnetically shielded for safe placement near video sources. 5-way binding post inputs for the most secure connections and the most versatile wiring applications Timbre-matched to fit into any Polk Audio home theater or multi-channel music system for a more realistic, more seamless surround sound environment.