I recently put my small Sonos system in place on our patio: a Roam that lives outside in a dock in the warmer months paired with an Amp that is hooked into to Sonance speakers. Its a simple system and we are really happy with the audio quality from it.
The reason we wanted the Roam paired with the Amp was to give voice control to the system. In a paired group we get exactly what we wanted. Only trouble comes when the power goes out, we have to go back into the amp and manually pair the devices again. I have seen a few posts of users with similar problems. Is there some kind of permanent solution to this? Overall we are very happy with our system, this is one of the few frustrations we have had.
A couple of threads I saw:
Keep device groups after power cycle | Sonos Community
Keep the group after a power loss | Sonos Community