Grouping ceiling speakers

No. Sonos does not provide any method currently to set a speaker up as a ‘center channel’. 

Bummer! Ty

i did a little more searching… when I’m in the Sonos Amp menus, I’ve setup some passive non-Sonos Boston Acoustics floor standing speakers as a stereo pair under the TV menus. The BA’s have seen better days and I was gonna ‘upgrade’ to the Era 300’s. Will the Era’s be a ‘stereo-pair’ then I could ‘detect’ the ceiling speakers when I get to the new home?  
 

Granted - these are not a ‘center channel’ but my priority is music, not movies. 
 

Honestly, I’m not sure what you’re asking, so I’ll try to give you some info that may help.

The Era 300s can certainly be set up as a stereo pair, in another Sonos ‘room’. Any Sonos ‘room’ can be grouped with another Sonos ‘room’, and play music in sync. 

However, if set up as another Sonos ‘room’, and not as surround speakers, when playing an input from a TV (I’m assuming that you’ve set up you Amp with the Boston Acoustics that way), there will be a slight delay. Again, this is only when playing the input from the TV. They’ll be in sync when streaming music to any/all Sonos ‘rooms’

If, however, the Sonos Era 300s are set up as surround speakers, bonded to the Amp as such, then when playing music, you can set them up (in the surrounds menu) as ‘Full’, rather than ‘Ambient’ support, and force them into full stereo when streaming music to the Amp. 

Thx again. 
 

to clarify… all in same room. Same group. I want to stereo pair era 300. Add in a stereo pair of architectural ceiling speakers. Front vs rear won’t matter. Run the HDMI out of the Sonos amp (hosting ceiling speakers) to the tv.  If there’s a delay - it sucks and I can’t do it. If they all play the same and retain right/left stereo - I’d be good with that. That would work right?

Got it.  Thx!