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): 310 x 175 x 250mm 6) Satellite size (L x W x H): 125 x 115 x 180mm Outer packing: 4sets/ctn Carton dimensions (L x W x H): 715 x 450 x 430mm Carton volume: 0.1384cbm N.W.: 25kg G.W.: 26kg