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Octav
Contributor I
May 20, 2022

Antenna interference

  • May 20, 2022
  • 20 replies
  • 245 views

Hi everyone. I have a Sonos Arc which I have recently paired with a Sonos sub gen3. 
There is a very annoying sound comming from the sub when the system is on but nothing playing. 
I have tried all the channels of my router but the noise is still there. I have tried to change the channel of the sub but the option seems to be innactive on the Sonos app. 
Any iddea of how to get rid of the noise apart from unplugging?

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    OctavAuthor
    Contributor I
    May 22, 2022

    You may want to try pulling the power lead out of the Sub, rotating it 180 degrees, plug it back in and see if that helps with the noise.

     

    Thank you! Didn’t think of that, but I may as well give it a try.

    OctavAuthor
    Contributor I
    May 22, 2022

    Other than WiFi devices, are you aware of any nearby radio transmitters?

    If this is some sort of radio interference, physically moving SUB to another location will at least change the character of this interference. SUB uses a private 5GHz channel when Bonded with ARC. You have no control over this channel.

    Likely there is a  hardware issue with SUB and you’ll need to work with SONOS support. 

    Meanwhile, try using a high quality power line surge suppressor and keep SUB’s power cord bundled as short as possible. Older TV’s often included a “Ferrite Bead” and users were instructed to pass the TV’s power cord through this device. If you have one of these, clamp it over SUB’s power cord, close to the SUB end.

    There are no transmitters nearby. The noise is still there, no matter where I move it. If I stream music from the phone, it works perfectly well. On standby, I get the noise. 

    106rallye
    106rallye
    May 22, 2022

    I’d call Sonos on monday…..

     

    buzz
    buzz
    Grand Maestro
    May 22, 2022

    If you reduce the Volume to zero or Mute the Room while music is playing do you have the noise?

    Read through the footnotes here then wait for the system to enter idle mode. Do you hear any noise during idle?

    OctavAuthor
    Contributor I
    May 22, 2022

    If you reduce the Volume to zero or Mute the Room while music is playing do you have the noise?

    Read through the footnotes here then wait for the system to enter idle mode. Do you hear any noise during idle?

    With zero volume, noise is still there

    buzz
    buzz
    Grand Maestro
    May 22, 2022

    Is the noise still present when SUB is in idle mode?

    OctavAuthor
    Contributor I
    May 22, 2022

    Is the noise still present when SUB is in idle mode?

    Yes, it is

    buzz
    buzz
    Grand Maestro
    May 22, 2022

    This suggests that there is a mechanical noise associated with the SUB power supply. Likely, this noise is still present while music is playing, but music masks the noise.

    OctavAuthor
    Contributor I
    May 24, 2022

    This suggests that there is a mechanical noise associated with the SUB power supply. Likely, this noise is still present while music is playing, but music masks the noise.

    Yes. Given the facts, Sonos has concluded it should be replaced

    OctavAuthor
    Contributor I
    May 24, 2022

    I’d call Sonos on monday…..

     

    I did. Thank you. Replacement

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