Rockford Fosgate P1S4-15 Punch P1 SVC 4 Ohm 15-Inch 250 Watts RMS 500 Watts Peak Subwoofer Punch P1 svc 4 ohm 15-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 250 watts RMS 500 watts peak power rating 15-Inch, 4-Ohm subwoofer with 500 watts maximum power handling (250 watts RMS) Kevlar fiber reinforced paper cone with high-density poly-foam Surround 15-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