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Amazon.com: Pyle 12" 6400W 4-Ohm DVC Car Stereo Power Audio Subwoofer Set, 4pk | PLPW12D : Electronics
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Amazon.com: DS18 ZXI15.4D 15" High Excursion Car Audio Subwoofer 2000W Watts Dual Voice Coil 4-Ohm 4 Magnets (1 Speaker) : Everything Else
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