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
8V] Subwoofer neu? - HiFi, Car-Alarm und Elektrik (8V) - A3-Freunde
Ballwin Client Audi S3 Audio Upgrade Stage 1: Bass
For Audi A3 8v 10 Channel Upgrade 12 Channels Front Midrange Speaker Wire + Rear Subwoofer Wire Cable - Fuses - AliExpress
Audi A3 8V Agent Woofer 8V0035411D Speaker Side Rear | eBay
Amazon.com: 4pcs Car Auto AC Air Condition Vent Outlet Decoration Ring Cover Trim for Audi A3 8V New : Automotive
Audi A3 - Custom Stealth Sub Install (Pictures Included) - AudiForums.com
AUDI A3 S3 RS3 8V B & O BANG OULFSEN GENUINE ORIGINAL SPEAKERS SUBWOOFER SALOON | eBay
Audi A3 saloon subwoofer | Audi-Sport.net
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 S3 Audio Upgrade – Cartronics
Ballwin Client Audi S3 Audio Upgrade Stage 1: Bass