Features: 1) Output power: 30W + 10W x 2 2) Impedance: 4 ohms 3) Frequency response: 40Hz - 150Hz, 150Hz - 20KHz 4) S/N: 75dB 5) Subwoofer size (L x W x H): 338 x 195 x 280mm 6) Satellite size (L x W x H): 130 x 110 x 180mm Outer packing: 4sets/ctn Carton dimensions (L x W x H): 880 x 385 x 480mm Carton volume: 0.1626cbm N.W.: 26kg G.W.: 27kg