Hi

With a surround set-up, Sonos treat the whole group as a single Sonos Room and so it’s not possible to only have audio from one speaker without breaking the set-up.  If you are worried about the volume, you could select the Night setting in Settings for the Beam.

Thanks for your response. Not a deal breaker just was curious in the rare case I wanted to play Spotify or listen to radio on one of the ones as opposed to having the full set up playing audio.