@Marky_Mark No problems after switching the speakers. So it seems that the Citation 300 needs a stronger connection than the Citation One. Which is rather strange considering the big price...

@Kevin_Z Just swapped the speakers and will test it for a day or so. If it works fine like this I will probably at an extra M9. I will update on the progress. Any idea when the new firmware is...

I have a Deco M9 Plus downstairs which is about 4 metres away from my smart speaker Harman Kardon Citation 300. The Citation 300 gives a 'weak' wifi signal in it's display. The device losses...