RAAT for Phantoms

[ogs]

that can be synched in Roon

I do not think RAAT is built for this kind of synchronisation. Sync between L and R in stereo needs to be close to zero ms all the time. No drift between channels is allowable.  RAAT will not do that I believe... RAAT on Dialog is realistic however.
How Devialet will solve stereo for Reactor will be interesting to learn. One possible solution is to send stereo to one speaker and then split L and R and send one channel to the other speaker over wifi or ethernet... time will show