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Amazon.com: New BOSS Phantom P156DVC 15" 2500 Watt Car Audio Subwoofer Sub Woofer DVC 4 Ohm : Electronics
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Amazon.com: SVS SB-3000 13" Sealed Subwoofer (Black Ash) : Electronics
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Amazon.com: Orion HCCA154 15" 2500W RMS Dual 4 Ohm Competition Car Subwoofer, Black Coil : Electronics
Amazon.com: HERTZ Dieci Series DBX-303 12" (300mm) 4-Ohm Sub Enclosure, 250 wRMS : Electronics
