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Contributor I
November 7, 2024
Question

Arc Ultra + Era 100 Surrounds

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?

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302 replies

Corry P
Sonos Staff
January 14, 2025

Hi ​@Zorro88 

It was delayed until this evening due to someone being off work sick.

I will update you all as soon as I have something that I can share with you - please be aware that it may take approval and therefore a bit more time.

"Common sense is the collection of prejudices acquired by age eighteen." - Albert Einstein
Lyricist II
January 14, 2025

TripleBobatron - I chose the Era 100s over the Era 300s precisely because the 300’s front drivers are disabled in Surround configurations.  With the Era 100s I can just aim the speaker toward our wall hugging couch.  Unfortunately the issues with the Arc Ultra 5.1 kind oh messed that up.  


Can they be side mounted and pointed at the seating? I was under the impression the 100s and 300s HAD to be behind the seating? I was looking at the symfonisk purely because they’re slim enough that they’d technically be ‘behind’ me

In an ideal world the 300s would support side-wall mounting rather than needing to be behind - use the front driver for surround channel data (firing sound directly at the seating area), and the upwards firing for overhead atmos data….
 

This is a configuration my old Samsung system supported really well (and sounded amazing), giving a great atmos bubble with accurate tracking… up until it died and Samsung couldn’t repair it 

Lyricist III
January 14, 2025

TripleBobatron - I look at the Era 100 more like a traditional bookshelf speaker in the the woofer and tweeters point out the front of the speaker.  With my couch being against the wall and a chair on each side of the couch, there just isn’t a lot of room to hang speakers on the wall or even position a couple of speaker stands next to the couch or chairs.  Having had various home theater setups in the past I know I like the surround rear sound to primarily be directed toward the right and left of those seated.  With the Era 100s I have the right rear speaker on a dresser type furniture piece with the Era 100 pointed at a slight angle back toward the seating and the left rear speaker on an equally high bookshelf aimed at those seated.  The Era 300 design doesn’t lend itself for placement within a bookshelf.  To me the form factor of the Era 100 makes it a little easier to place the speaker pretty much wherever you happen to have a place for them.  I also feel the Arc Ultra itself gives me the Dolby Atmosphere immersion on its own with the Era 100s giving me the “fly by” sound I enjoy while watching a movie like Top Gun.  To be totally forthcoming, when I purchased the Arc Ultra and the Era 100s I already had two Sonos Play 5s and a Sonos Sub (Gen. 2) in the same room.  At this point I only use the Play 5s for Music and can reconfigure the Sub with them if I need more Base.  

Lyricist I
January 14, 2025

Hi,

I'm waiting to receive my arc ultra, I already have 2 Era 100s to put in surround and a Sub 4.

 

I admit that Im a little afraid of being disappointed in my investment :(

 

The new CEO said:  ” It’s also true that when it doesn’t work, our customers are taken out of the moment and are right to feel that we’ve let them down. I think we’ll all agree that this year we’ve let far too many people down. As we've seen, getting some important things right (Arc Ultra and Ace are remarkable products!) is just not enough when our customers' alarms don't go off, their kids can't hear their playlist during breakfast, their surrounds don 't fire, or they can't pause the music in time to answer the buzzing doorbell. ”

 

This means that he is informed of the problem!

I have always heard good things about Sonos except this year, I hope that the rest will be positive otherwise next!

Stanley_4
Grand Maestro
January 14, 2025

On positioning, the recommendations for positioning are made to get you the best possible sound.

If you can’t get your Sonos in the positions recommended give them a try in where you can put them.

My Era-100 surrounds are nowhere close to the recommended position, height or even the direction they are pointing. Still sounds better with them than without. I tried 300s in the same locations and as I expected they weren’t a great improvement over the 100s since I wasn’t seeing the full ability of the multiple drivers in the 300.

I do prefer the Era 100s to my previous Play 1 surrounds.

The Era 300s are a very good sounding Atmos pair in another room of the house.

Trending Lyricist I
January 15, 2025

I have a new Arc Ultra with Sub 4 and will get the Era 100’s once I know this issue with surrounds has been resolved and working satisfactorily for most. Although, I do wish Sonos would make dedicated surrounds like an Era 100 with an up-firing speaker(Era 200? ;-) where all drivers are utilised.

I’m choosing the Era 100’s over the 300’s, not due to price but because I like the size and I suspect the 100’s are more forgiving in a room that is not proportional while the Era 300’s is less forgiving. My room is open on one side and half open in the rear i.e. the walls are not proportional so I’m assuming virtualised sound would sound better in this scenario. Is my assumption correct?

Avid Contributor III
January 15, 2025

Yeah i hear you. i have both and i’ll try 300’s as surround (when i am back home, out of uk atm) but they are larger. a 100 type body with upfiring driver would have been perfect for me. 

having said that, i am quite curious about 300’s. I visited a friend of mine who has samsung q990d and i have to say sound bubble is great but… surround speakers are not heavy or significant. it’d be interesting to see what 300’s will bring to my ht system rather than 100’s. I have a beam gen 2 and i read so many people saying it’ll overwhelm my beam but we’ll see. i’ll report

Enthusiast I
January 15, 2025

[...]

Your post is not (fully) relevant to the topic; surround sound issue caused by Sonos firmware. Please stay on topic so this thread will not become a chat about Ultra + surrounds in general. Ask your question in the last part of your post in the right thread.

Lyricist III
January 15, 2025

[...]

Your post is not (fully) relevant to the topic; surround sound issue caused by Sonos firmware. Please stay on topic so this thread will not become a chat about Ultra + surrounds in general. Ask your question in the last part of your post in the right thread.

You might want to avoid discouraging Posts that bring “color and context” as to why the Arc Ultra Surround (5.1) issues are important to Customers in the first place.  Do you think redirecting a Customer’s Post encourages participation or perhaps tends to silence folks?  Hopefully Forum Moderators can work to ensure when risky extra context needs to be called out as “not fully relevant”.  The specific Post you call out indicates they recently purchased an Arc Ultra and are directly watching this Tread to decide when the time is right to add Surround Era 100s to their System Configuration.  What could be more “on point”?  

Enthusiast I
January 15, 2025

[...]

Your post is not (fully) relevant to the topic; surround sound issue caused by Sonos firmware. Please stay on topic so this thread will not become a chat about Ultra + surrounds in general. Ask your question in the last part of your post in the right thread.

You might want to avoid discouraging Posts that bring “color and context” as to why the Arc Ultra Surround (5.1) issues are important to Customers in the first place.  Do you think redirecting a Customer’s Post encourages participation or perhaps tends to silence folks?  Hopefully Forum Moderators can work to ensure when risky extra context needs to be called out as “not fully relevant”.  The specific Post you call out indicates they recently purchased an Arc Ultra and are directly watching this Tread to decide when the time is right to add Surround Era 100s to their System Configuration.  What could be more “on point”?  

In the part I refer to, he asks advice for making a purchase choice for his specific room. There are dedicated threads to discuss this, while this thread is clearly about the surround issues causes by firmware. Let’s focus on testing and reporting here. I don't want to ‘silence’ anyone, just asking to post in the right thread. Sonos will still know about it.