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Sonos port to Beoplay A9 4th Gen

  • March 10, 2025
  • 2 replies
  • 188 views

I need detailed guidance how to connect Sonos Port to Beoplay A9 4th gen so that it can play along in sync with the Sonos system of speakers I have (Era 300, Arc). So far I was able to connect the Port to the Sonos system and connected the Port to the B&O A9 using an RCA to 3.5 mm cable (A9 has only 3.5 mm in). No sound whatsoever coming out of A9. I used the line out ports of the Port to plug the RCA. I am doing something wrong apparently as for now only the Sonos speakers are playing the online radio stations, not the A9. Guidance needed

Best answer by Michael01

Make sure the Line-Out Level in the Sonos app is set to "Fixed" instead of "Variable" (under Settings > System > Sonos Port). Also, check that the Beoplay A9 is set to the correct input source. If it's still not working, try a different RCA to 3.5mm adapter to rule out a cable issue.

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2 replies

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  • Contributor I
  • Answer
  • March 10, 2025

Make sure the Line-Out Level in the Sonos app is set to "Fixed" instead of "Variable" (under Settings > System > Sonos Port). Also, check that the Beoplay A9 is set to the correct input source. If it's still not working, try a different RCA to 3.5mm adapter to rule out a cable issue.


  • Author
  • Contributor I
  • March 11, 2025

Thanks, the A9 was not set to line-in input source, that resolved the issue.