Rockford Fosgate has always been known as "The PUNCH" and the P2 12 inch car subwoofer certainly continues with the tradition. Kevlar fiber reinforced paper cones deliver bass impact you can feel along with VAST technology to increase surface cone area of your sub up to 25%. The P2 Punch subwoofers perform best in standard sealed and vented enclosures. Includes diamond cut cast aluminum trim ring.