The Move is mono, but two Moves can be paired for stereo (WiFi only, no pairing with Bluetooth). 

Thanks a lot. And just to be sure, the same happens with Sonos One? And the only Stereo Speaker on its own is the Play 5?

Yes, the Play:5 is stereo.  

Can I pair Sonos Move only with another Sonos Move to a Stereo Pair or can I also Pair it with a Sonos One or Sonos Play ?

You can only stereo pair the same models.

Thanks for the quick answer.

Kind of disappointing that it does not work with other models. 

But “grouping” is something else right ? and it should work with Sonos On …. or not ?

Grouping is different than a stereo pair.  You can have the Move play music in sync with a Sonos One, for example, it’s just that they will both be playing mono rather than stereo pair.  

Essentially, a single speaker, or a bonded stereo pair, home theatre setup, etc...make up a Sonos room.  Sonos rooms can be grouped together.

Pairing two models that have different sonic characteristics makes no sense.  Stereo pairs are meant to blend into a seamless soundstage.  That effect is diminished if you have one channel sounding different from the other.

Yes, any room can be grouped with any other room(s).  They will all play the same signal, there is no L/R channel separation.

I’m very new to setting up my a/v system, and I’m a little lost by this answer… I have a projector that I’d like to pair with bluetooth speakers. If I connect one Move to the projector via bluetooth, could I not also pair another Move to the first Move over wifi for a stereo speaker set-up? Any help would be appreciated.

No.  Moves can be paired as stereo only when connected to the Sonos system and app.  Using Bluetooth switches it off the Sonos system and app, making it a standalone Bluetooth speaker.