Type: On-Wall/In-Wall 3.7" Shallow Profile Centre Speaker, Design: 2-1/2 way,Driver Size : HF 1" dome tweeter, LF 2 x 4" woofer 2 x 4" high- compliance passive radiators, Amplifier Power: 60 - 120 watt, Nominal Impedance: 8Ω, Sensitivity : 87dB, Frequency Response : 70Hz-19kHz , Dimensions (WxHxD):630mm x 220mm x 93mm, , Mounting Options: Wall mounting bracket included, Accessories:IWO WB 64 (In wall bracket) sold separately.Weight:6kg