Hello, I’ve been dealing with the following problem for three days now: With my Audi 100 C4 saloon built in 04/1991, a Sony radio was installed for decades, which has passively controlled the rear speakers. This had to be done because of the originality and I have now built in a gamma CC. This works quite well, except that the rear speakers in the hat rack of course no longer work. This is the Nokia active speakers. I already reset the plug assignment on the radio to the standard according to the enclosed switching plan. However, the plug assignment on the rear speakers is a mystery to me. There are three plugs per speaker (1 x 2 pins, 2 x 4 pins and 1 x 5 pins). According to the circuit diagram, all 5 pins are to be found on the plug with 5 pins. I also did that once… without success. In this case, it is not possible that the speaker has to access all the pins correctly. Thus, the 5-pin connector pin 1 and pin 4 are empty.