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Alpine R-W10D4 Type R 10" Dual 4 OHM Subwoofer with GTR-601 Mono Subwoofer Amplifier 600 watts RMS x 1 at 2 ohms - Creative Audio
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Massive Audio TKO12S4 TKO Series. 12 Inch, 600 Watt, 8mm Top Plate, Single 4 Ohm Car Subwoofer. Sold Individually.
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Amazon.com: Lanzar 8in Car Subwoofer Speaker - Black Non-Pressed Paper Cone, Stamped Steel Basket, 4 Ohm Impedance, 600 Watt Power and Rubber Suspension for Vehicle Audio Stereo Sound System - MAX8 (1 pack) : Electronics
Pyle Pltab122 12 Inch 600 Watt Enclosed Carpeted Cylindrical Tube Vehicle Car Audio Subwoofer Speaker Sound System With Built In Amplifier : Target
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