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Amazon.com: 12" Dual Loaded Compact Active Subwoofer System, 1200W Audio Bass Subwoofer Sub, 150W RMS Subwoofer Enclosure with Integrated Amplifier : Electronics
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Amazon.com: Cerwin Vega VEGA Shallow 12" 150W RMS 2Ω Spare Tire Powered Subwoofer - Slim Car Audio System with Integrated 1 Channel Amplifier, Bass Knob, PWM MOSFET Power Supply, & Passive Radiator
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