Audi A3 - Custom Stealth Sub Install (Pictures Included) - AudiForums.com
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
Ballwin Client Audi S3 Audio Upgrade Stage 1: Bass
Basser - AUDI A3
Alpine - SPC-300A3 Premium Alpine Sound System for Audi A3, S3, RS3
Audi A3 2003 Onwards JL Audio 8" 150 Watts Car Subwoofer Custom Bass Box Kit