What I have: Nucleus Rev. B w/ 16 GB RAM and 4 TB SSD using USB connection to SMSL SU-1 DAC then RCA to Sonos Amp powering a pair of Aperion Novus 5T Towers.
With the Sonos Amp and Aperion speakers as one zone, I also have nine other Sonos zones for a whole house music streaming experience. Due to the maximum 6 zones that the Nucleus Rev. B can support, driving all 10 Sonos zone was problematic with zones dropping.
To resolve the problem, the workaround that works best for me is to group the zones in the Sonos App with the Line Input of the Sonos Amp as source. This has worked for me and no zones are dropped. The only “inconvenience” is I’m unable to control volume in the Roon App and have to control volume in the Sonos App.
How has your experience been with Roon and Sonos?