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12" Bass box car audio sub woofer built in amp active amplified 1800 watts Loud. : Amazon.co.uk: Electronics & Photo
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Amazon.com: Pioneer TS-WX1220AH Dual 12" Ported Enclosure Active Subwoofer with Built-in Amplifier, Black : Electronics
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Audio Visual World - Ground Zero GZIB 200BR-ACT Single 8" Sub & Bass Box Enclosure with Built-in Amp
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