Rockford Fosgate P1S4-10 Punch P1 SVC 4 Ohm 10-Inch 250 Watts RMS 500 Watts Peak Subwoofer Features 2 Inch Copper Clad Aluminum Voice Coil Stamp Cast Frame Structure Features Flex Fit Basket Design Kevlar Fiber Reinforced Paper Cone 250 Watts RMS 500 Watts Peak Power Rating 10-inch, 4-ohm subwoofer with 500 watts maximum power handling (250 watts RMS) Kevlar fiber reinforced paper cone with high-density poly-foam surround High-temp voice coil with spun-laced Nomex re-inforcement collar Flex fit basket for slight adjustments when mounted One-year limited manufacturer's warranty