I received 2 brand new cables and tried both on 2 different kempers and 2 different remotes. Both kempers are on the latest 3.02 firmware. I reinitialized my original kemper with no luck and I'm currently waiting on a reply from kemper as to what to do next
Try to downgrade sended kemper - why not- it is simple task and nothing to loose:)Just download kaos from :http://www.kemper-amps.com/api/download/dlid/590/alternate/0/Kemper Profiler Firmware 2.7.4 Release
and put this into OS Update folder into the pendrive. put the pendrive into the kpa and he will ask about the rest:) Then reset KPA with connected remotes and wait what will happens.