Who in the world designs such unconnectable speakers?

Aside from the nebulous “unconnectable”, you haven’t actually described your problem. While we appreciate hearing about your purchasing history throughout your lifetime, perhaps you could skip that and tell us what problem you are having?  

So you bought a really old, used, long out of production speaker, and decide to blast Sonos as the cause of the issue?

Seriously, give us users some information action on your setup and the issue and we can try to help, otherwise you can contact Sonos Support and get assistance.

​@ccb105, You can also write in French.

Well, we tried.