Type: On-Wall/In-Wall 4.7" Shallow Profile Centre Speaker, Design: Driver Size : HF 1" dome tweeter, LF 2 x 6" glass-fibre cone woofers, 2 x 6" high-compliance passive radiators, Amplifier Power: 150-300 watt, Nominal Impedance: 8Ω, Sensitivity : 89dB, Frequency Response : 43Hz-22kHz , Dimensions (WxHxD):884mm x 323mm x140mm, Mounting Options: Wall mounting bracket included, Accessories:IWO WB 72 (optional On wall bracket) .Weight:15.2kg