Impedance:8Ω Nom Power:12W Max Power: 20W Sensitivity: 92dB Freq Range:140Hz ～20KHz Driver Unit:Woofer:5〞Tweeter:0.5〞 Dimensions (HxWxD)mm:142X177X225 Outer packing dimension:232mmX184mmX149mm Q'TY:4PCS N.W: 7.8KG G.W: 8.5KG