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shutter41
Contributor I
Nov 20, 2025 1:02 PM UTC
Answered

Arc Ultra Surrounds/Sub Disconnect Almost Daily

Problem:

Almost daily, my surrounds/sub all disconnect from the Arc Ultra and stop playing sound (thought he Arc continues working as expected). When this occurs, the app shows "Needs attention" for the Arc Ultra. Power cycling the Arc Ultra immediately resolves the problem for 24-48 hours.

Setup:

  • Soundbar: Arc Ultra (connected via Wi-fi)

  • Surrounds: 2x Symfonisk Bookshelf Gen 2 surrounds

  • Sub: Sub Mini

  • Routers: Asus AX86U Pro + AX58U AiMesh Node

  • Other Sonos speakers in the house use SonosNet via a single Symfonisk lamp that is wired to the router (does SonosNet play any part for the surrounds/sub in this setup?)

Things I've Already Tried:

  • Various AiMesh binding options

  • Disabling DFS channels on 5 GHz

  • Setting router 5 GHz control channel to static value

  • Disabling automatic Sonos firmware updates (on the theory that the update process resulted in the disconnect)

  • All the standard Asus Wi-fi tweaks to improve compatibility with Sonos (Airtime Fairness, beamforming, etc.)

  • Repeatedly re-bonding surrounds/subs to Arc Ultra

Question:

Is there anything I can do to fix this? I know Sonos is going to say "it's your network", but clearly the system can work with my network just fine, and can automatically reconnect everything after an Arc Ultra reboot, so why can't the Arc Ultra be smart enough to fix whatever problem is occurring in real time without me needing to manually reboot it?

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Stanley_4
Stanley_4Answer
Grand Maestro
Nov 21, 2025 4:22 PM UTC

If your latest tweaks don't stabilize things wait for the issue, submit a diagnostic and call support, request they find and solve the issue or send you a replacemment Arc.

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Stanley_4
Stanley_4
Grand Maestro
Jan 1, 2026 5:19 PM UTC

Once a day dropouts can indicate a DHCP related error. Easy to deal with, set static/reserved IPs for all Sonos and power them down, reboot the router and controller, wait a couple minutes and power the Sonos  back up.

If that isn't the solution a diagnostic is in order.

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    Donstuarty
    Lyricist III
    Jan 1, 2026 5:24 PM UTC

    I have the same problem with my mini sub and arc ultra. Every day, just the once, it loses connection and has to be rebooted. Looked into this a lot, tried many things, Sonos customer services has had a go, but still it loses connection to the arc ultra even though the white light remains solid. I too am hoping a firmware update will solve the problem but who knows!

    Hi Marmite,

    I fixed mine my turning the arc of and resetting the router. Then turn the arc back on and everything has been good since. Hope this helps you buddy

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      Stanley_4
      Stanley_4
      Grand Maestro
      Jan 1, 2026 5:56 PM UTC

      That does sound like an address issue, if it returns after a power loss or update/reboot heep the reserved addresses in mind as they work around the issue.

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      The marmite man
      Trending Lyricist I
      Jan 1, 2026 6:34 PM UTC

      Reserved addresses?

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      AjTrek1
      AjTrek1
      Jan 1, 2026 6:42 PM UTC

      Reserved addresses?

      Yes that is a possible solution. Outside of having the knowledge on how to set them it also depends if you have admin rights. To do so Owning your own router should be no problem. However if you are using a router provided by your ISP the process may not be straightforward or even possible. Since ​@Stanley_4 suggested setting Reserve IP Addresses I’ll leave the task of explaining how to him 😂.

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      The marmite man
      Trending Lyricist I
      Jan 1, 2026 6:49 PM UTC

      I’m not sure how to do that unfortunately. 

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      Stanley_4
      Stanley_4
      Grand Maestro
      Jan 1, 2026 7:50 PM UTC

      Open your router's admin web page, go to something like "DHCP Settings" and there should be a Help screen there to walk you through it. If not then refer to the user's manual for your router.

      Once addresses are reserved for ALL Sonos power them all down, reboot router and controller, wait a couple minutes and then power up all your Sonos devices.

      If you can find no help in your router post the router information and we will see what can be done.

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        The marmite man
        Trending Lyricist I
        Jan 1, 2026 7:52 PM UTC

        Thank you, much appreciated. 

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        Donstuarty
        Lyricist III
        Jan 1, 2026 8:03 PM UTC

        Sorry guys by reseting my router i meant powering it off for a couple of mins then turning it back on again. Im not very technical either.

         

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        Stanley_4
        Stanley_4
        Grand Maestro
        Jan 1, 2026 8:34 PM UTC

        Not a problem, the router power-cycle / reboot along with the Sonos power-cycle will usually be enough to temporarily clear the issue. If it keeps popping up consider the address reservation option to prevent that.

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