Dimensions: H: 42" (105 cm) D: 12" (30 cm) W: 10" (25 cm) Weight: 120 lbs (55 Kg). Driver Complement: 1" Mr_1 Ring Radiator tweeter 2 X 7" Nano-Tec woofers Sensitivity: 89 db Impedance: 4 ohms Frequency Response: 32Hz-40KHz Recommended Power: 50-300 Watts