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Amazon.com: Rockville 10" 500w Powered Subwoofer Tube + Bass Remote, 10 inch (RTB10A) : Everything Else
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Amazon.com: Rockville RTB65A 6.5" 300w Powered Active Car Subwoofer Bass Tube + MP3 Input, Black : Everything Else
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Kicker 46CWTB102 Weather-proof sealed tube enclosure with one 10" 2-ohm subwoofer and 10" passive speaker at Crutchfield
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