TSx Series bi-laminate composite driver cones, tuned perfectly with our Dynamic Balance process, produce smooth, natural sound. They are lightweight, but super stiff, with exceptional damping, for high efficiency and low distortion. * All Polk loudspeakers are timbre-matched within their series, designed with the same components throughout, to achieve seamless speaker-to-speaker blending effects in multi-channel systems. * Reversible, aimable, all-MDF enclosure is non-resonant, and features a 5/8-inch-thick baffle, for heavy duty high performance in a center channel speaker. * Gold-plated, professional-style 5-way binding posts, for the most secure connection options. * 5 YEARS parts and warranty