Hi Farkas,
I have some "sad" news, I am afraid my Doepfer - A-103 module doesn't work :-( There barely comes any sound out of it, if I unnaturally high amplify the output then I hear a bit however when I then turn the frequency knob I don't get much results other than a bit of a cracking sound. Sounds to me that this module doesn't work... So I need more time to investigate this properly.
Since I saw you also mentioned the SEM filter from Doepfer in another post, instead of reviewing the A-103, I will make a review report of the Doepfer - A-106-5 SE SEM filter module. I hope to have that ready by (end of) September. Kind regards, Garfield.
For review reports of Eurorack modules, please refer to https://garfieldmodular.net/ for PDF formatted downloads