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Amazon.com: DS18 Elite Z8 Subwoofer in Black - 8", 900W Max Power, 500W RMS, Dual 4 Ohms, DVC - Premium Car Audio Bass Speaker Great for Low Frequencies and High Power Applications (
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Amazon.com: DS18 SLC-8S Subwoofer in Black - 8-Inch Speaker, 400W Max Power, 200W RMS Power, Aluminum 4 Layer Voice Coil, Black Steel Frame, SVC, 4 Ohm Impedance, Ferrite Magnet (1 Speaker) (SLC8S) : Electronics
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