Dimensions (Inc'l stand): H: 42" (106 cm) D: 18" (45 cm) W: 15" (38 cm) Weight: 200 lbs (90 Kg) Driver Complement: 1" ring radiator Revelator tweeter 7" Nano-Tec mid-woofer Sensitivity: 87 db Impedance: 4 ohms Frequency Response: 40Hz-40KHz Recommended Power: 50-250 Watts