Polk Audio CS10 Center Channel Speaker (Single, Black) 1-Inch (25mm) Fabric/Polymer Composite Dynamic Balance Dome Tweeter with powerful Neodymium magnet structure delivers clear and detailed high frequency response for realistic reproduction of vocals and instruments. Two 5-1/4 in. Bi-Laminate Composite Dynamic Balance Drivers are lightweight and stiff with good damping for high efficiency, excellent bass and lower distortion. Non-resonant all-MDF enclosure construction with 3/4 in. thick baffles ensures cleaner, clearer, more lifelike sound quality. Unique Reversible-design cabinets can be turned upside down to aim up" when placed under a video monitor. Five-Way Binding Post Connectors for more secure hook-up options.