Type: On-Wall/In-Wall 3.7" Shallow Profile 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 : 88dB, Frequency Response : 70Hz-19kHz, Dimensions (WxHxD):220mm x 630mm x 93mm , Mounting Options: Key-hole bracket fitted, Accessories:IWO WB 64 (In wall bracket) sold separately.Weight:6.4kg