Era 100s should sound great as surrounds, but the Era 300s will give you a more immersive experience especially with Dolby Atmos audio.
Make sure your TV is set to these settings (if available):
eARC: Auto
Digital Audio Out: Auto 1
Dolby Digital Plus Output: Dolby Digital Plus
Pass Through Mode: Auto
Also be sure to perform Trueplay tuning and adjust the Surround Audio settings in the Sonos app.
Often folks are unimpressed by the surrounds but it is the source material that is lacking in surround sounds. I’ve seen recommendations here in the forums on some good options to test but I didn’t keep links to them so you’d have to search a bit.
Top Gun maverick. I’ll try the terminator when we get home.
We are keeping the 100’s. Bought a sub and speaker stands. We moved the 100’s closer to the seating area and tuned the speakers. Hoping this helps.
#browndk26
I have Era 100 as surround in my home-cinema kit. The one thing i have notice….you will get a better opertunety when tweeking the placement of the speakers. I used $300 to get the org Sonos Era 100-stands. And i have been enjoying them ever since. So a couple of stands WILL make a difference. But of course you need to have space for them.