Hi-fi replacement speaker Power 25 Wrated 60 Wmax Impedance 6ohm Resonant frequency fo 98 Hz Output SPL 88d B at 1W 1m Steel chassis Pressed paper cone Rubber cone suspension Specifications Chassis Material Pressed Steel Voice Coil Impedance 6plusmn 10 Omega Voice Coil Diameter Material 25.9mm ALCone Material Paper Cone Suspension Rubber Res Freq Fo 98 Hzplusmn 20 Output SPL88plusmn 3d B Max Power 60 W Rated Power 25 W Magnet Dimensionsn outside dia. x inside dia x depth 70x 32x 15mm 60x 32x 10mm Magnet weight 228g 8oz. 99g 3.5oz Chassis Diameter 138mm Baffle Cutout 110mm Fixing Centres 4 x 4mm holes on 127mm circle Weight 808g