I am a very happy owner of the excellent Lumin U2X network transport — or at least I was until yesterday. Yesterday, I upgraded the firmware to Version 21.1b (released Oct 24, 2025). Unfortunately, I am not satisfied with the sound quality after this update. I have read several threads online and learned that it is possible to revert to a previous firmware version. I would like to return to Version 20.0 (released Aug 13, 2025), as its sound quality suited my system perfectly. Is it possible to get the required firmware file and detailed instructions on how to perform the downgrade?
