The speakers themselves are quite substantial. Not bookshelf size but definitely closer to your typical Q-Acoustics speaker in size. Like a lot of these smaller systems, their sound output is much larger than their size. These speakers sounded great out of the box. It could be argued that when I started playing about with them all I ended up doing was bringing them almost back to their initial state. The woofer is typical of smaller system woofers (of which I have had many). When set up and positioned correctly it adds heft to the sound without overpowering it*. The physical installation is straight forward but as every reviewer has said, the push button wire install is fiddly.
*update* I am now using my Tannoy TS series sub which just "feels" like it goes deeper. The Focal sub is still OK and there isn't much in it, but there is a difference which is hard to describe but it is definitely there when listening to lower frequencies.
As for the Atmos set-up? It took some time and Googling but that wasn't all about the speakers. The receiver has to be reconfigured for Atmos so you effectively start again with speaker setup. My Blu-Ray player wasn't bit streaming but instead converting everything to PCM. Not a problem with Dolby THD and DTS-HD but definitely a problem with Dolby Atmos and DTS-X.
Once that was done I concentrated on setting up the speakers using the Atmos 'Amaze' Demo.
I think I must have played that demo about 50 times. Every time I made a change to a setting in my receiver, player or speaker position I played that trailer until it was as immersive as I thought possible and the height effects worked. The great thing about that demo is that it tests your satellites surround, height and sub LFE effects. The Nature's Fury demo also has a great LFE effects.
Maybe you can get half decent Atmos sound with these speakers without the extra work but it just won't be optimal and you may end up sending the speakers back.
Good Demo disks include:
Pacific Rim (Atmos - Totally immersive)
Legacy Spiderman 2 (Atmos - surprisingly great effects driven mix)
Serenity (Aggressive effects driven DTS-X mix)
The Matrix (Atmos mix definite upgrade on original)
Focal Sib Evo User Review
Decent Sound, Effective Dolby AtmosReview of Focal Sib Evo Speaker by Coulson, Jun 2, 2018.This item was purchased from SevenOaks in 2018. The reviewer still owns this product.
Value For Money9