If the rear speakers are quiet only when playing music, compare Ambient and Full playback before increasing the volume or replacing the speakers.
Set up a comparison
Play a familiar track from a music service through the Sonos room. Sit in the same seat for both passes and keep the room’s main volume fixed. In the Sonos app, open the room’s Surround Audio settings and change only Music Playback. If both rears become clearer in Full, the original behavior may have been the selected mode rather than a fault.
Interpret what happened
Sonos provides separate TV and music surround levels. If you prefer Full but find it too prominent, adjust the music level only. If one rear remains silent in both modes and during known surround TV content, investigate the speaker connection rather than boosting both rears.
Worked example
For example, if a vocal track sounds balanced in Full but the rear effects in a TV scene are already loud enough, keep the TV level where it is. Save the original music mode and level so you can reverse the comparison.
Documentation and next step
See the manufacturer’s instructions for supported settings and model requirements. For a related setup decision, see sonos speech enhancement before rear speaker buy.
