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Best answer by jgatie

All,

I have an Arc Ultra and Sub 4. At first the subwoofer would not connect. After many tries it finally connected. However, there is no sound coming out of it. The Arc cable is connected to my TV and the sub is hardwired to the Ethernet line. I've done multiple resets, disconnected and reconnected all cables and still nothing! All hardware in the app is showing as connected and with a strong signal. 

I did notice that after a reset, the sub does make a connection sound, but nothing after that. 

 

Do not wire the Sub to Ethernet, and do not turn off WiFi on the Arc Ultra.  They are designed to be wireless, and wiring the Sub via Ethernet causes the problems you are seeing.

7 replies

buzz
buzz
September 10, 2026

Describe your system. Which speaker do you want to connect to? 

    Stanley_4
    Stanley_4
    Grand Maestro
    September 10, 2026

    From your profile you have an Arc Ultra and Sub 4, the app should take you through the connection process.

    Hopefully you didn't follow the bad advice AI offers about disabling Wi-Fi as that doesn't do what it says, it turns off tne radio used to connect to tne Sub.

     

    https://support.sonos.com/en-us/article/set-up-your-sonos-sub

    https://support.sonos.com/en-us/products/sub-4

     

     

    106rallye
    106rallye
    September 10, 2026

    Doesn’t play sound or doesn’t connect? Please elaborate.

    KatznamedpabloAuthor
    Contributor I
    September 10, 2026

    All,

    I have an Arc Ultra and Sub 4. At first the subwoofer would not connect. After many tries it finally connected. However, there is no sound coming out of it. The Arc cable is connected to my TV and the sub is hardwired to the Ethernet line. I've done multiple resets, disconnected and reconnected all cables and still nothing! All hardware in the app is showing as connected and with a strong signal. 

    I did notice that after a reset, the sub does make a connection sound, but nothing after that. 

    jgatie
    jgatieAnswer
    September 10, 2026

    All,

    I have an Arc Ultra and Sub 4. At first the subwoofer would not connect. After many tries it finally connected. However, there is no sound coming out of it. The Arc cable is connected to my TV and the sub is hardwired to the Ethernet line. I've done multiple resets, disconnected and reconnected all cables and still nothing! All hardware in the app is showing as connected and with a strong signal. 

    I did notice that after a reset, the sub does make a connection sound, but nothing after that. 

     

    Do not wire the Sub to Ethernet, and do not turn off WiFi on the Arc Ultra.  They are designed to be wireless, and wiring the Sub via Ethernet causes the problems you are seeing.

      KatznamedpabloAuthor
      Contributor I
      September 10, 2026

      All,

      I have an Arc Ultra and Sub 4. At first the subwoofer would not connect. After many tries it finally connected. However, there is no sound coming out of it. The Arc cable is connected to my TV and the sub is hardwired to the Ethernet line. I've done multiple resets, disconnected and reconnected all cables and still nothing! All hardware in the app is showing as connected and with a strong signal. 

      I did notice that after a reset, the sub does make a connection sound, but nothing after that. 

       

      Do not wire the Sub to Ethernet, and do not turn off WiFi on the Arc Ultra.  They are designed to be wireless, and wiring the Sub via Ethernet causes the problems you are seeing.

      Thanks, I'll give it a try.

        User117655
        User117655
        Prodigy II
        September 10, 2026

        Is the sub bonded to the arc?

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