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shutter41
Contributor I
November 20, 2025
Answered

Arc Ultra Surrounds/Sub Disconnect Almost Daily

  • November 20, 2025
  • 45 replies
  • 1478 views

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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Best answer by Stanley_4

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.

45 replies

Show previous replies
Donstuarty
Lyricist III
January 1, 2026

I will def try that stanley if the problem arises again, but its been two weeks now and everything is still good. I must stress that it was just the sounbar and the router that i turned of and not my sub and surrounds.

Airgetlam
Airgetlam
January 1, 2026

Just to be complete, while the surrounds and Sub do get their IP addresses from the router, they normally communicate ‘through’ (or directly with, if you prefer) the soundbar, and get that IP data via proxy. There’s a better than average change that the duplicate IP address that was causing the issue was with the soundbar, not the other devices, but normally we suggest all Sonos devices be powered off, so that if the IP conflict is with another Sonos device, it will be cleared up. 

Bruce
    Donstuarty
    Lyricist III
    January 1, 2026

    I tried reseting all devices to factory settings a couple of times. It was a complete nightmare and the problem came back. Turning the soundbar of and on with the router is what worked. I actually think if i was to turn just the soundbar of and on again that might have worked too.

    Stanley_4
    Stanley_4
    Grand Maestro
    January 1, 2026

    Factory Reset is very rarely a cure, aside from a few specific situations (documented in the support section) it is best avoided until consulting Sonos support. It will often make things worse and cause you a lot of frustration and extra work recovering what it has destroyed.

    IP issues are difficult to diagnose, I wouldn't be surprised to see a post here that a Sonos IP issue was cleared up by someone rebooting their Keurig smart coffee brewer. 

      remsta
      Trending Lyricist I
      January 2, 2026

      ​@Donstuarty there is no point doing any more troubleshooting, you are wasting your time. The issue has been confirmed to be firmware level, Asus provided me with a beta firmware, I tested it and it solved the issue. They have told me they should release it in short order and it will solve this Sonos issue we are all having.

      Here is the global thread: https://www.snbforums.com/threads/issues-with-sonos-since-the-latest-update.95555/page-2#post-979509

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