Polk Audio TSx 550T Tower Speaker - Black 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. The high efficiency design of the TSx Series works well with practically any electronics, even the most modestly-powered amplifier or receiver, delivering a performance that?s spacious and clear, natural and realistic. Gold-plated, professional-style 5-way binding posts, for the most secure connection options. 5 YEARS parts and warranty