Dimensions: H: 54" (138 cm) D: 34" (87 cm) W: 22" (55 cm) Weight: 650 lbs (294 Kg) Driver Complement: 5" Motion transformer tweeter 5" Nano-Tec pure midrange 7" Nano-Tec midbass 3 x 10" woofers Sensitivity: 91 db Impedance: 4 ohms Frequency Response: 26Hz-50KHz Recommended Power: 50-500 Watts