REX Series Dual 4 ohms Subwoofer (8") - RE AUDIO Mica-filled poly cone Santoprene rubber surround Pressed steel basket High-temperature 8-layer copper voice coil FEA optimized motor structure Single magnet Linear conex spiders Rubber gasket Nominal imp: dual 4 ohms 75W RMS Motor width: 4.88" Motor depth: 1.9" 8" Mounting depth: 4.5" Mounting hole dia: 7.3" Overall dia: 8.7" Bolt hole circle: 8" Basket depth: 2.4" Displacement: .07 cu ft Weight: 6.2 lbs Re Audio Rex 8 Rex Series Dual 4_ Subwoofer (8") Mobile Audio and Video Accessories - Subwoofers