Type: Dipole Surround Speaker, Design: 2Way Vented, Driver Size : HF 2 x 1/2" dome tweeter, MF 2 x 4", Amplifier Power: 60 -125 watt, Nominal Impedance: 8Ω, Sensitivity : 86dB, Frequency Response : 75Hz-20kHz , Dimensions (WxHxD):318mm x 375mm x 165mm,Weight: 8.9kg