Devialet Dione HW or firmware issue?

[angelcxc]

I had the same shhhh sound issue coming from the center channel every time I use the Dolby Atmos content or the devialet space function, first of all, Devialet sent me a Dione with a different serial number than the one in the invoice, I contacted them and explained the issue and they decided to exchange mi dione
Now, the new dione arrived, but it has the same problem as the other, every time I watch a movie or listen to Dolby Atmos music and the volume is at 70 or more, that shhhh sound comes out from the center channel but when I set the volume to 60 or lower, the problem disappears and no matter the source, airplay, bluetooth or HDMI.

i'm thinking this is more a firmware issue than a hardware issue