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
BASSER Audi A3 - 8" Fit-Box Subwoofer Enclosure 8L
2016 AUDI S3 8V B&O BANG & OLUFSEN SPEAKER SUBWOOFER KIT OEM | eBay
Audi A3 8P subwoofer w boczek Audio System M08 R08 - YouTube
FBaudi02 Audi A3 8P Fit-Box subwoofer enclosure
Audi A3 8L 2002 Subwoofer Stereo Standard | eBay
Alpine - SPC-300A3 Premium Alpine Sound System for Audi A3, S3, RS3