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Rockford Fosgate Punch P300-10 Single 10" subwoofer enclosure with 300-watt amp at Crutchfield
6.5 Inch Car Woofer Speaker - 300 Watt High Powered White Injected Polypropylene Cone Car Audio Sound Component Speaker System w/ High-Temperature Kapton Voice Coil, 4 Ohm, 40oz Magnet - Pyramid WX65X : PYRAMID: Electronics
Lautsprecher Technik - Rockhouse 10 Inch Car Audio Subwoofer Tube Passive 300 Watt
NEW SKAR AUDIO IX-8 D4 8" 300 WATT MAX POWER DUAL 4 OHM CAR SUBWOOFER | eBay
Kicker 43CWRT671 CompRT 300 Watt 6.75 inch Shallow Mount Subwoofer - Dual 1 Ohm Voice Coil
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Amazon.com: 10 Inch Car Subwoofer Speaker - 300 Watt High Powered Car Audio Sound Component Speaker System w/ 1.5 Inch Kapton Bobbin Voice Coil, 8 Ohm, 25 oz Magnet, Cloth Edge Suspension - Pyramid WH10