Mica-injected polypropylene woofer cone with poly-foam surround. Power range: 100-200 watts RMS (400 watts peak power). Sealed box volume: 0.7 cubic feet. Ported box volume: 1.4 cubic feet.The item "Rockford Fosgate R2SD4-10 Ultra Shallow 10-Inch 4 Ohm DVC Subwoofer PAIR" is in sale since Sunday, October 13, 2019. This item is in the category "Consumer Electronics\Vehicle Electronics & GPS\Car Audio\Car Subwoofers". The seller is "onlinepromusic" and is located in Los Angeles, California. This item can be shipped to United States.