Polk Audio R50 Two-Way Floorstanding Loudspeaker (Black) Dual 6.5-inch 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 .75-inch thick baffles and internal bracing ensures cleaner, clearer, more lifelike sound quality Handles up to 150 watts per channel 5-way binding post connectors, allowing for more secure hook-up options Measures 7.75 x 36.75 x 11.9 inches (W x H x D)