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Slot or L-Ported Subwoofer Box for Dual 12" GT5-12 JBL Subwoofer #caraudio #subwoofer #speaker #fyp - YouTube
In the making, 4th order bandpass to house a JBL GT5-12. Removable/Interchangeable... - Fat Sound Customs - Specialist Custom Built Bass Box Subwoofer Enclosures | Facebook
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