Hi @Maponti.

Welcome, thank you for reaching out to Sonos Community, We appreciate your time and effort in posting your concern here in our community.

Are there any changes you made so far with your wifi or speaker?

Can you tell me more about what's going on with your speaker?

If you need help with any other information, please be sure to let us know.

Hi Mark, 

each of my 12 sonos works correctly when I test one to one…. when I connect all of its together only 2 works.…

I have a specific wifi only for sonos… but I cannot have all the play 1 works....

Are you trying to pair them or group them?

Yes… i did it …. neither pairing or grouping...