Audio Adapter for Audi A3 S3 A4 S4 TT Ground Loop Isolator Bose Active Rear Sub (Iso adapter)

Ground Loop Isolator Adapter — Audi Bose Active Rear Subwoofer | A3, S3, A4, S4, TT

Eliminate the annoying alternator whine and ground loop interference that plagues aftermarket head unit installs on Audi vehicles with the factory Bose active rear subwoofer. This adapter sits inline between your head unit's subwoofer output and the Bose amp, breaking the ground loop without affecting audio quality.

An essential part of any clean aftermarket audio install on Bose-equipped Audi models.

Compatible Vehicles

• Audi A3 8L / 8P — with Bose active rear subwoofer
• Audi S3 8L / 8P — with Bose active rear subwoofer
• Audi A4 B6 / B7 — with Bose active rear subwoofer
• Audi S4 B6 / B7 — with Bose active rear subwoofer
• Audi TT Mk1 / Mk2 — with Bose active rear subwoofer

⚠️ Only required on vehicles fitted with the factory Bose active subwoofer system. Standard (non-Bose) audio systems do not need this adapter.