Dimensions: H: 42" (105 cm) D: 15" (38 cm) W: 12" (30 cm) Weight: 160 lbs (72 Kg). Driver Complement: 1" Ring Radiator tweeter 6" Nano-Tec pure midrange 2 X 7" Nano-Tec woofers Sensitivity: 89 db Impedance: 4 ohms Frequency Response: 32Hz-40KHz Recommended Power: 50-300 Watts