The **Rockford Fosgate R1S4 12** 12" Prime Series 600 Watt 4 Ohm SVC Subwoofers use an anodized aluminum voice coil former that provides superior heat dissipation (up to 100° at max power levels). These subs can handle 300 watts of MAX power per sub (600 watts per pair) and 150 watts of RMS power per sub (300 watts per pair)! They have the capacity to handle power under continuous demand, conforming to CEA 2031 industry standards. The R1S4 12 subs also features: a parabolic polypropylene cone, 12 gauge compression terminals, a single voice coil design, and a stamped basket. This sub is best suited for standard sealed enclosures. Receive superior Rockford Fosgate quality with the Rockford Fosgate R1S4 12 Prime Series Subwoofers! Also included in a Dual 12" Heavy Duty Vented Subwoofer Enclosure! Read more [here][1] Read the manual [here][2] [1]: http://www.rockfordfosgate.com/rftech/library/2009/5_Subwoofers/R1S412_revA TS.pdf [2]: http://www.rockfordfosgate.com/rftech/library/2009/5_Subwoofers/1230 55703 01_Prime_Subs MAN.pdf