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Amazon.com: Infinity - Two Kappa 12" (300mm) 500 Watt RMS, High-Performance Subwoofers, Switchable 2 OR 4 OHM : Electronics
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Infinity® Primus 1270B Sealed Slim Enclosure 12" Subwoofer | Quality Auto Sound | Western United States
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INFINITY KAPPA 1200W 12" CAR AUDIO SUBWOOFER W/ SELECTABLE 2 OR 4-OHM IMPEDANCE 50667371333 | eBay
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