JBL Studio 580 Dual 6.5-Inch Floorstanding Loudspeaker (Each) Dual 6.5-Inch (200mm) Low-Frequency Transducers with PolyPlas cones 1-Inch (25mm) High-Frequency Compression Driver Glass-filled ABS Bi-Radial High-Frequency Horn 3/4-Inch (19mm) ultra-ridged MDF Enclosure Exclusive Design