Rockford Fosgate Prime R1S412 R1 12-Inch 150 Watt Subwoofer - 4 Ohm Anodized aluminum voice coil former|Parabolic polypropylene cone|12 AWG compression terminals|Stamped steel basket|Single voice coil design|Optimized for sealed enclosures|12-inch subwoofer with 300 watts maximum power handling|Parabolic polypropylene cone|Anodized aluminum voice coil former|Stamped steel basket|Optimized for sealed enclosures 12-inch subwoofer with 300 watts maximum power handling Parabolic polypropylene cone Anodized aluminum voice coil former Stamped steel basket Optimized for sealed enclosures