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Arc Ultra and Era 100’s 

 

Anyone else have this setup and noticing that the Era 100’s as rears are doing less work with the Arc Ultra when compared to the standard Arc? I’m barely noticing any audio coming from the rears even with the surround volume turned up to maximum.  I swapped my original Arc back with the Era 100 surrounds and tested the same Atmos movies on the Arc and the Arc Ultra, and there is a significant difference/reduction in the signals being sent to the Era 100’s in the rear channels with the Arc Ultra.  Increasing the “TV Level” setting for Surround Audio in the Sonos app increases the front surround volume coming from the Arc Ultra but the signals coming out of the ERA 100 rears are almost non existent. 
 

Is this behavior the result of how the Arc Ultra processes surround channels, and should be considered normal operation?

I have the same problem with the Arc Ultra + Sub Mini + 2 One's

yes very disappointing top notch money limited sound. I would have choose other wise if I knew the problem

What a b*****

Moderator Note: Modified in accordance with the Community Code of Conduct.

I have the same problem with the Arc Ultra + Sub Mini + 2 One's

yes very disappointing top notch money limited sound. I would have choose other wise if I knew the problem

What a b*****

Moderator Note: Modified in accordance with the Community Code of Conduct.

Before you go off the deep end 😂 how about describing your issue. We may be able to assist.

We issue is like everyone else’s on this thread when you choose to go surround with Era 100 and ultra you loose control of the era speakers and the sound from them is very faint. 

I’m truly sorry you’re experiencing this issue. What did Sonos Support say, when you called in with your system diagnostic?

Hey there. I had the same issue. I upgraded my Beam 2 to the Ultra, but the sound from the Era 100 practically dropped to zero. I'm thinking of returning the Ultra and going back to the Beam 2.

Hello.

October 4th 2025.

i have beam gen1 and 2 symfonisk book shelf as rear surrounds.

decided to go for the arc ultra.

when i setup i found the rear symfonisk bookshelves aren’t compatible with arc ultra as surrounds.

So i bit the bullet and bought 2 era 100’s.

All the set up went smooth, so era 100’s are now rear surround, did the full trueplay also.

problem.

im amazed how the surround sound is nowhere near as good-distinct as the old beam gen1 and rear surrounds symfonisk bookshelves.

Actually amazed as I was really looking forward to Amos and generally better surround with this brand new and expensive setup.

the arc ultra and both era 100’s went through updates when I first set them up obviously.

 

my tv has arc hdmi for the arc ultra, not e arc hdmi.

but that’s exactly what the beam gen 1 was plugged into .

just disappointed the new era 10@‘s are so weak and not anywhere near as effective as the old ‘ incompatible ‘ symfonisk bookshelves.

 

 

 

 

So sorry you fell for the same hyped advertisement of Sonos as myself. It was the worst €2000 spent in my life and I am 69 yrs old. 
even back 15 yrs ago my surround was so much superior 

what a shame 

I had arc and play ones with sub . This was so good and now replacedx the arc with ultra and surrounds with era100’s and the moves  don’t feel full . I watched the same movies that i would love watching on atmos with the old arc and some of the sounds that would come from the arc and surrounds are not even there anymore . it feels like a massive improvement in speech clarity coming from center speakers , but when iam watching a action scene it feels so bland. 

It’s a shame the Sonos know about this massive issue about the surround and they still keep selling the system. 
i really would have thought they send an upgrade to the system. 
 

SHAME TO SONOS

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