Audi A4 B6 B7 Saloon S-Line Sport Bose Speakers x4 Amplifier Subwoofer 2001-07 | eBay
a4mods.com :: - The Premiere Audi A4 Modification Guide and Pictures Library
Stereo Integrity - Our b7 Audi Avant with our IB-24 subwoofer in the spare tire well. Will be completely stealth when finished. Can't wait! ______ Follow our IG, FB and Twitter and
For Audi A4 B6 B7 8E Saloon Subwoofer Housing for 25 CM Woofer Space-Saving 4047442079436 | eBay
How to Remove Subwoofer and Amp (Avant) - Audi A4 S4 RS4 - B6 B7 - 2001-2008 - TOTAL TECHNIK - YouTube
How to audi a4/a5 bang & olufsen subwoofer upgrade - B+C Guides
Audi A4 B6/B7 - 10" Fit-Box Subwoofer Enclosure 15L