Confirm the room configuration
The two Sonos One SL speakers must be configured as surrounds for the Beam room, not as an independent stereo pair.
Adjust surround audio
- Open Sonos and select the home theater room.
- Open room settings and locate Surround Audio (wording can vary by app version).
- Increase the TV surround level gradually while playing familiar surround content.
- Adjust music surround level separately if desired.
Bonus: Bring Sonos into your Alexa smart home
Compatible Sonos systems can work with Alexa for supported voice-controlled music playback, helping you use one familiar assistant alongside other smart-home devices. The Sonos One SL speakers themselves have no microphones, so they need a compatible Alexa-enabled device or another supported control path for voice requests.
Alexa is a convenient control point, not a replacement for Sonos settings. To adjust TV surround levels, return to the Sonos app. For the bigger picture, see how to bring different smart-home brands together with Alexa.
What worked for us
After mounting rear speakers, small surround-level changes helped the rear channels stand out without needing to turn up the main soundbar. Results depend on room acoustics, source content, and speaker placement.