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
OEM Audi A3/s3 8v Sedan Loudspeaker Subwoofer 8V0035412B for sale online | eBay
Audi Sound System Retrofit Kit | islamiyyat.com
2016-2020 AUDI S3 RS3 A3 8V B&O BANG & OLUFSEN SPEAKER TWEETER SUBWOOFER KIT OEM | eBay
Speakers for Audi A3 8V No. 1 - Ahifi.en
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
Audi A3 8V Subwoofer B&O Woofer 8V0035382A - FZN Parts