Type: On-Wall/In-Wall 4.7" Shallow Profile Centre Speaker, Design:2 way, Driver Size : HF 1" dome tweeter, LF 2 x 6" glass-fibre cone woofers, 2 x 6" high-compliance passive radiators, Amplifier Power: 100-200 watt, Nominal Impedance: 8Ω, Sensitivity : 88dB, Frequency Response : 56Hz-22kHz , Dimensions (WxHxD):770mm x 313mm x 121mm, Mounting Options: Wall mounting bracket included, Accessories:IWO WB 71 (optional On wall bracket) .Weight:10.9kg