REAudio REX V2-10 200W 10-Inch REX Series Single 4 Ohm Subwoofer 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 Power handling: 200W / Impedance: Single 4 ohm