For A3 8v 10 Channel Upgrade 12 Channels Front Midrange Speaker Wire + Rear Subwoofer Wire Cable - Car Stickers - AliExpress
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 8V Ground Zero GZCS 10SUB 300W 25cm Subwoofer Spare Wheel Bassbox 4037072016604 | eBay