Rockford Fosgate R2D4-10 Prime R2 DVC 4 Ohm 10-Inch 250 Watts RMS 500 Watts Peak Subwoofer Mica-injected polypropylene woofer cone with poly-foam Surround Stamped solid-steel frame Power range: 50-250 watts RMS (500 watts peak power) frequency response: 45-250 10-inch, dual 4-ohm subwoofer with 500 watts maximum power handling (250 watts RMS) Mica injected polypropylene cone with poly-foam surround Linear spider with embedded 16 AWG tinsel leads StampCast basket with integrated spider venting One-year limited manufacturer's warranty