Interface for replacing the original power amplifier with a higher quality aftermarket power amplifier The audio signal is filtered from the MOST bus (fiber optic) and supplied as a standard 6-channel stereo signal (front R/L, rear R/L, subwoofer, center) Suitable for the following vehicles: Audi A4 8K Audi A5 8T Audi A6 4F Audi A8 4E Audi Q7 4L Scope of delivery: interface fiber optic cable set power supply cable set