Rockford Fosgate R2SD4 12 Prime 12" 4 Ohm DVC Shallow Subwoofer (R2SD412) RFD1 The JL Audio C2 650 doesn't marshall party speaker The JL Audio C2 650 doesn't just offer mid bass ensuring that your speakers remain reliable and your music keeps playing regardless of the challenges posed by the weather The Rockford Fosgate R2SD4 12 Shallow Subwoofer is designed and engineered with a much smaller motor assembly which reduces the overall depth of the woofer allowing it to fit in shallower enclosures and tighter locations of your vehicle The R2SD4 12 sub features a 12" mica injected polypropylene cone that works with a high density poly foam surround to punch out fat