Size of appearance: 320(W)x610(H)x245(D)mmx2 Frequency Response: 50~20KHz Sensitivity: 500mv SNR: >60db Total in harmony wave distortion: 0.1% Sound of ways is seperation degree: >40db Rated power: 80w x 2 (8 ohm) Impedance of loudspeaker: 4 ohm Speakers: (10″+2.5″+2.5″)x2 Voltage of the power: AC 220V 50Hz