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Amazon.com: DS18 SLC12S Car Subwoofer Audio Speaker - 12" in. Paper Glass Fiber Cone, Black Steel Basket, Single Voice Coil 4 Ohm Impedance, 500W MAX Power and Foam Surround for Vehicle Stereo
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Amazon.com: SOUNDSTREAM BXW-124 Bass Xtreme 2400 Watt 12-Inch Dual 4 Car/ Truck Audio Subwoofer Speakers with 4 Layer Voice Coil, Black (2 Pack)
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