Upgrading Speakers for Non-Bose B6/B7 Audi A4 – Nick's Car Blog
Xtrons 8" Car Radio For Audi A4 B6 / B7 Android 12 Qualcomm 6+128 Car Multimedia Player Built-in Dsp Aa Ae-4g Wireless Carplay - Car Multimedia Player - AliExpress
Audi A4 (B6) 00-04 Audio System speakers 6,5" front/rear+insulation+Adapter Brac | eBay