M.A.P Audio & Customs - Custom made fiberglass 8" subwoofer enclosure for an audi a3 8v. This was hand made with mdf rings and support braces. It was then fiberglass and covered
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FBaudi01 Audi A3 8L Fit-Box subwoofer enclosure
2006 - 2012 AUDI A3 Bose Speaker set w Subwoofer 8P4035382A OEM | eBay
Basser - FBaudi01 Audi A3 8L Fit-Box subwoofer enclosure
Has anyone added a subwoofer or amplifier to their 8v? | Audi-Sport.net
JL AUDIO TW3 DEMO CAR TRIPLE SUB FLAT INSTALL IN AUDI A3 - Adam Rayner Talks Audio
Audi A3 - 8" Fit-Box Subwoofer Enclosure 8L
Audi A3 2003 Onwards JL Audio 8" 150 Watts Car Subwoofer Custom Bass Box Kit