Sold 2017 Audi A3 Audi Subwoofer Speaker Unit 8V0-035-412-B,
A guide to upgrading the sound system on A3 8v (so that it's Hi-Fi and better than the B&O system) | Audi-Sport.net
A3 B&O sub woofer | Audi-Sport.net
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
2016 A3 Premium dual sub and Amp install. HELP!! - AudiWorld Forums
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