Upgrading Audi A3 OEM Subwoofer with aftermarket 8" JBL woofer and DS18 Candy Amp in stock location. - YouTube
2003 - 2013 Audi A3 Amp and Sub Install - YouTube
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
Audi A3 boot | Car audio, Car audio installation, Car audio subwoofers