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The **Rockford Fosgate R1S4 12** 12" Prime Series 300 Watt 4 Ohm SVC Subwoofer uses an anodized aluminum voice coil former that provides superior heat dissipation (up to 100° at max power levels). It has the capacity to handle power under continuous demand, conforming to CEA 2031 industry standards. The R1S4 12 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 Subwoofer! TW12 SINGLE This Q Power TW12 Single Single 12" Sealed Car Audio Subwoofer Box Enclosures feature solid 5/8" MDF construction, charcoal carpet covering, terminal cup connectors, 0.9 cubic feet of air space per Box, and a mounting depth of 5.5 inches. Turn your ride into a sound machine with the help of the QPOWER QTW12 **Single 12"** Sealed Car Audio Subwoofer Sub Box Enclosure!