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Moose6864
Contributor I
June 9, 2026
Answered

Home Theater system

i recently purchased the sonos arc ultra and era300 speakers to create a home theater system when grouped together i get sound from the arc speaker and one of the era 300 the right rear but no sound from the left, if i disconnect all of them from the grouping i get sound out of all of them but loose dolby atomos effect

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Moose6864Answer
Contributor I
June 10, 2026

Speaking with sonos support, they have found that the one Era 300 speaker has the region as UK, while the rest are US, so it won't connect to the system. Waiting on tech support for a solution. 

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46 replies

Stanley_4
Stanley_4
Grand Maestro
June 10, 2026

Why did you decide to Group them rather than set them up as a Home Theater Room?

If you decide to set them up as a single Room you should be able to hear sound from  each speaker and there should be no delay/echo that you get when Grouping.

If there is still an issue after setting them up as a single Home Theater Room you can try powering all Sonos down, rebooting the router, then powering the Sonos back up. 

If still an issue, remove the surrounds and add them back swappi g the right and left.

Airgetlam
Airgetlam
June 10, 2026

And, if you have difficulty, you can always 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
106rallye
106rallye
June 10, 2026

For clarification: “grouping” is when you play two “rooms” together. When you set up a surround system all speakers should be in one “room” in the app - the Era speakers should have been added as surrounds to de soundbar “room”. Did you really “group” the speakers?

    Moose6864Author
    Contributor I
    June 10, 2026

    Why did you decide to Group them rather than set them up as a Home Theater Room?

    If you decide to set them up as a single Room you should be able to hear sound from  each speaker and there should be no delay/echo that you get when Grouping.

    If there is still an issue after setting them up as a single Home Theater Room you can try powering all Sonos down, rebooting the router then powering the Sonos back up. 

    If still an issue, remove the surrounds and add them back swappi g the right and left.

    I'll check the Home Theater setup i didn't see it the first time, thank you

    Moose6864Author
    Contributor I
    June 10, 2026

    For clarification: “grouping” is when you play two “rooms” together. When you set up a surround system all speakers should be in one “room” in the app - the Era speakers should have been added as surrounds to de soundbar “room”. Did you really “group” the speakers?

    This is my set up, I get sound from fom the ultra and the right rear but not left rear. If I disconnect the home theater mode and play music through the sonos app I have sound.

     

    Moose6864Author
    Contributor I
    June 10, 2026

    I played this video from YouTube it shows each channel as it sends sound to each one when it shows the left rear getting sound i actually hear it from the front left

    AjTrek1
    AjTrek1
    June 10, 2026

    What do you mean by…”disconnect the home theater mode” 🤔 That’s not a thing. 

    Together Everyone Achieves More = T.E.A.M.
    AjTrek1
    AjTrek1
    June 10, 2026

    I played this video from YouTube it shows each channel as it sends sound to each one when it shows the left rear getting sound i actually hear it from the front left

    Whoa… there is no front left in a Sonos home theater. Are you using some type of 3rd party app? You should only have a soundbar, surrounds and maybe a sub. Then again are you saying you are hearing sound from the left side of the soundbar?

    Together Everyone Achieves More = T.E.A.M.
    Moose6864Author
    Contributor I
    June 10, 2026

    I played this video from YouTube it shows each channel as it sends sound to each one when it shows the left rear getting sound i actually hear it from the front left

    I removed the all from the home theater mode and set them up individually as separate speakers 

    Moose6864Author
    Contributor I
    June 10, 2026

    I played this video from YouTube it shows each channel as it sends sound to each one when it shows the left rear getting sound i actually hear it from the front left

    Whoa… there is no front left in a Sonos home theater. Are you using some type of 3rd party app? You should only have a soundbar, surrounds and maybe a sub. Then again are you saying you are hearing sound from the left side of the soundbar?

    No using the sonos app

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