Rockford Fosgate Prime R1S4-10 R1 10-Inch 150 Watt Subwoofer - 4 Ohm Anodized aluminum voice coil former Parabolic polypropylene cone 12 AWG compression terminals 10-inch subwoofer with 300 watts maximum power handling Parabolic polypropylene cone Anodized aluminum voice coil former Stamped steel basket Optimized for sealed enclosures