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Renowned Enthusiast I
April 16, 2026
Answered

Replacing Sonos One surrounds with Era 100 setup question

Hi,

I currently have the Sonos Arc Ultra, Sub Mini, and 2 x One.

I’m planning to replace the 2 x One with 2 x Era 100.

Is it enough to just remove the current surrounds and add the new ones in the app?

Or is it better to re-pair the Arc + Sub + Era 100 from scratch? I’m wondering if anything from the previous sound profile might still be linked.

Thanks!

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MoPac
MoPacAnswer
Headliner III
April 16, 2026

Just remove the One speakers then add the 100s.  Run Trueplay when you’re done.

16 replies

MoPac
Headliner III
April 16, 2026

The Era-300s are great but only if you can position them close to properly, my 100s sound better than the 300s in the locations I had to put them.

Interesting.

AjTrek1
April 17, 2026

The Era-300s are great but only if you can position them close to properly, my 100s sound better than the 300s in the locations I had to put them.

Interesting.

​@Stanley_4 has posted pictures of where his Era 300’s are/were mounted which would definitely give the edge to the Era 100’s. Although in his defense I think he mentioned as it being a need to keep peace 😂

Together Everyone Achieves More = T.E.A.M.
MoPac
Headliner III
April 17, 2026

The Era-300s are great but only if you can position them close to properly, my 100s sound better than the 300s in the locations I had to put them.

Interesting.

​@Stanley_4 has posted pictures of where his Era 300’s are/were mounted which would definitely give the edge to the Era 100’s. Although in his defense I think he mentioned as it being a need to keep peace 😂

Ahhhh.  My wonderful wife puts up with the 300s on stands 7-8 feet behind me.  I also took over the dining room with a KEF LS 50WII system.  I think secretly she likes the sound.

melvimbe
April 17, 2026

The Era-300s are great but only if you can position them close to properly, my 100s sound better than the 300s in the locations I had to put them.

Interesting.

​@Stanley_4 has posted pictures of where his Era 300’s are/were mounted which would definitely give the edge to the Era 100’s. Although in his defense I think he mentioned as it being a need to keep peace 😂

 

Now I want to see ​@Stanley_4’s pic. 

Era 300s are getting multiple ‘channels’ of audio for dolby atoms, where as any other speaker used as surrounds only gets a single audio channel.  So it definitely has the advantage there.

To be clear, when I say a speaker in single audio channel, I mean that each tweeter is playing the same audio, even though there are multiple tweeters.  Same if there are multiple woofers.

 

Danny
Stanley_4
Grand Maestro
April 17, 2026

Where I wanted the 300s to go wasn't spousally approved, she didn't like them there and had other plans for the space. We briefly discussed wall mounting, actually acceptable sonically, but a brief "hold them up there" got another hard no. Not unreasonable as the Play 1s on my original Arc sounded reasonably good and her "why not similar speakers in the same space" had merit. Swapping for 100s that were intended for another room was a win-win for both spaces.

I listen to the kitchen 300s a lot more than I do my Arc Ultra and 100s and given the ever increasing number of Atmos tracks and the decrease in movies I watch I'm not unnhappy.

Big L shaped room with tne tv at the center of the L and seating in the corner.

Wall mount under the window didn't pass, on the bookshelf sounds amazingly good. 

.

Renowned Enthusiast I
April 17, 2026

Got my Sonos Era 100s today and the sound’s definitely better. It really stands out when playing music in Full mode, you get a much wider, more blended sound that fits way better with the Arc Ultra.

Haven’t had the chance to test anything else yet. I’ll try to watch a movie later and let you know how it goes.