JBL BassPro 12 12" Car Audio 450 Watts Peak Powered Subwoofer System with Slipstream Port Technology - Road Entertainment
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JBL GT Bass Pro 12 vs. Rockford Fosgate P300 12 - Battle of Powered Subwoofers - Decibel Results!! - YouTube
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Amazon.com: JBL GT-BassPro12 12-Inch (300mm) Car Audio Powered Subwoofer System, black : Electronics
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