Speaker/woofer Specifications Peak Input Power 220W Rated Input Power 21W Woofer Cone material Polypropylene (PP) Cone Speaker Basket Steel Speaker Surround Cloth Sensitivity 88dB/W/m Frequency Response 50Hz ~ 18000Hz Speaker Impedance 4Ω Dimensions (W x H x D) 104 x 104 x 46.2mm Mounting Depth 43mm Mouting Hole Diameter Ø 94mm Speaker Weight 369gr Gross Weight 800gr Weight of Magnet 160gr