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Contributor I
December 23, 2025

Arc Ultra Surround

My arc ultra is connected to my Samsung TV by ehdmi and works fine. I can set up my Era300s (2) as stand alone speakers but when I set them up as surround with my arc ultra it shows connection issues with the eras. Any advice would be greatly appreciated. 

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7 replies

jgatie
December 23, 2025

Is the Arc connected via Ethernet?  If so, the WiFi still needs to be turned on for the Arc, because the surrounds connection still requires WiFi.

DMBMBAAuthor
Contributor I
December 23, 2025

Thank you, the Arc is connected to WiFi 

MoPac
Headliner III
December 23, 2025

Are you separating the 300 stereo pair prior to setting them up as surrounds?

DMBMBAAuthor
Contributor I
December 26, 2025

Yes, it’s only when I set them up as surround with the Arc. 

Stanley_4
Grand Maestro
December 26, 2025

What does the network connection look like in the app's Settings? 

 

DMBMBAAuthor
Contributor I
December 31, 2025
Everything seems good there. 

 

Stanley_4
Grand Maestro
December 31, 2025

That looks better than most of my Sonos, you may have an interference issue with the private/hidden Sonos 5 gHz surround/sub network.

About all you can do is try and find what is causing the problem or wait for the issue and submit a diagnostic and call Sonos to have it looked at.