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Sammyk77
Contributor I
January 31, 2026
Answered

Line in

  • January 31, 2026
  • 7 replies
  • 170 views

Hello, I have my turntable connected to my Era 100 speakers through the official Sonos 3.5mm to USB-C adapter. The issue I have is it's doesn’t automatically detect and connect to the line in when I play music to it. If I disconnect and reconnect the USB part of the adapter, it detects it and switches to it like it should. Any ideas why it doesn't detect it automatically without reseating the adapter?

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    Best answer by AjTrek1

    Your auto play room should be the room where the Era 100 is located. You should also have the volume level set to about mid-way or slightly less to avoid blasting the speaker when the needle makes contact.

    After streaming all you should do is select the line-in for your turntable (Era 100). You should not have to remove and re-insert the cable. Also before selecting line-in ungroup after streaming that may help so that the Era 100 is the only speaker. You can regroup after the record starts playing.

    7 replies

    Airgetlam
    Airgetlam
    January 31, 2026

    Seems odd. Have you rebooted the speaker itself? Checked for and applied any updates?

    If so, I would recommend that you submit a system diagnostic within 10 minutes of experiencing this problem, and call Sonos Support to discuss it. Don’t post the resulting diagnostic number here, Sonos’ lawyers get sensitive about GDPR, I suspect.

    There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.

    When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.

    Bruce
      nik9669a
      Senior Virtuoso
      January 31, 2026

      Do you have Autoplay enabled? Is there any kind of “time-out” that might come into play? 

      Sammyk77Author
      Contributor I
      January 31, 2026

      Thanks for the responses. I forgot to mention that I do have auto play turned on. I tried it with and without “grouped devices” turned on. It seems to stay on the line in until I switch to streaming. Then when I try to go back to line in, it doesn't switch.  

      Sammyk77Author
      Contributor I
      January 31, 2026

      I realized that it does switch correctly if I unplug and plug the 3.5mm side in and out. I was thinking that it would switch if it detected any signal, but maybe it only switches if it detects something being plugged in. I am currently using an A/B input switcher to two different sets of speakers, and I'm thinking that possibly the ground remains connected, so it doesn't detect that, either. 

      AjTrek1
      AjTrek1Answer
      January 31, 2026

      Your auto play room should be the room where the Era 100 is located. You should also have the volume level set to about mid-way or slightly less to avoid blasting the speaker when the needle makes contact.

      After streaming all you should do is select the line-in for your turntable (Era 100). You should not have to remove and re-insert the cable. Also before selecting line-in ungroup after streaming that may help so that the Era 100 is the only speaker. You can regroup after the record starts playing.

      Together Everyone Achieves More = T.E.A.M.
        Sammyk77Author
        Contributor I
        February 5, 2026

        I have tried all of that, but it doesn't seem to work as expected. How do you select the line in? I don't see anywhere on the app to do that if it hasn't already auto detected the input. 
         

        Airgetlam
        Airgetlam
        February 5, 2026

        It doesn’t show up unless you have an input connected. Which makes me think you may be having an issue, either with the Line In on the Era 100, or the adapter itself. I’d certainly remove any A/B switch for testing, although I’m not sure how any switch fits in the line in at all. Better to test in the best, most direct case possible, then add complexity to identify the issue. 
         

        If you’re continuing to have issues, I would call Sonos Support to discuss it.

        When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.

        Bruce
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