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System speaker connections

  • February 8, 2026
  • 5 replies
  • 73 views
P

Hi there, I’m so completely frustrated. For no apparent reason, my mini sub, and 2 x ONE SL’s have stopped working. All three speakers have a solid white light on but are now not showing in my “Living Room” system. The Arc Ultra is working. (I have an arc ultra, a mini sub and two ONE SL’s). I’ve tried a factory reset on the mini sub and it connected it to the wifi successfully and then at the final hurdle I get a message “Sub not found. Make sure your sub is powered on and connected to wifi” - which it is. During set up I got another saying “you may not see your speaker in your system and if so disconnect the power and reconnect power to finish set up” - I’ve tried that and NOTHING happens at which point my only option seemingly is to start the whole process again. I’m going around in circles. 

 

Cheers.

Best answer by Airgetlam

I’d make sure the radio/wifi is turned on on your Arc Ultra, it doesn’t make any difference if you’ve wired it to your router or not, it communicates with the Sub and Surround speakers via the radio/wifi, so it must be ‘on’ in the controller.

Factory resets are almost never fruitful. I suspect you need two things. The first, more important step, is to do a network refresh. Power down/unplug all of your Sonos devices, then reboot your router. Wait two minutes, then plug back in/power on your Sonos. Wait another two minutes, then open your controller, and check for updates and apply them. 
 

Second, because you factory reset your Sub, you’re going to have to set it up again. Act as if you just unboxed it, and reconnect it (called bonding) to your Arc Ultra

5 replies

Airgetlam
  • Airgetlam
  • Answer
  • February 8, 2026

I’d make sure the radio/wifi is turned on on your Arc Ultra, it doesn’t make any difference if you’ve wired it to your router or not, it communicates with the Sub and Surround speakers via the radio/wifi, so it must be ‘on’ in the controller.

Factory resets are almost never fruitful. I suspect you need two things. The first, more important step, is to do a network refresh. Power down/unplug all of your Sonos devices, then reboot your router. Wait two minutes, then plug back in/power on your Sonos. Wait another two minutes, then open your controller, and check for updates and apply them. 
 

Second, because you factory reset your Sub, you’re going to have to set it up again. Act as if you just unboxed it, and reconnect it (called bonding) to your Arc Ultra

Bruce
    Stanley_4
    • Stanley_4
    • Grand Maestro
    • February 8, 2026

    It can't be said too often! 

    If the question is "how do I make things worse?" Factory Reset is the answer.

     

    There are specifically documented reasons to do a factory reset or Sonos support may recommend one after looking at your situation.

    Otherwise don't. 

      P
      • PAULSL22
      • Author
      • Contributor I
      • February 24, 2026

      Thanks very much for all your input. I basically had to start from scratch, but ultimately I’ve decided that Sonos has a complete mind of its own and there’s nothing I can do about it. One day a room shows in my system, the next day its gone, the day after it re-appears. Todays glitch was the speaker status lights decided to switch themselves off for no apparent reason. 

      Honestly at time I want to throw the whole lot in the trash. 

       

      Cheers.

       

      Airgetlam
      • Airgetlam
      • February 24, 2026

      Again, it really sounds like network issues. Do the procedure I previously suggested. If you’re continuing to have issues, call Sonos Support to discuss it. There are millions of us who aren’t having issues. 

      Bruce
      buzz
      • buzz
      • February 24, 2026

      I recommend resetting or reinstalling the controller. All important data is stored in the players, not the controller. If the controller is confused with respect to the system setup or networking, the reset will fix this. I can imagine that the ARC ULTRA is or was a bit confused after Factory Resetting the SUB and ONE SL’s.

      I also agree that the fundamental issue was or still is the network setup. Web and email access is very easy because it is one to one communication with external sites. SONOS units constantly chat with each other and the controllers over the local network. Default network setup can frustrate this chatting. Some network hardware defaults have not been updated in a decade or more and are no longer appropriate for a system such as SONOS.

      Describe your network for us. Give model numbers. Note that Factory Rest destroys diagnostic data that could have been used by SONOS Support to identify network issues. Submit a Diagnostic within ten minutes of an event, then contact phone support.

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