You described it well "ANC - is unnoticeable" -
Comparing its operation ANC in Sony, Bose or Apple headphones .... this function poorly mutes external sounds.
But in my opinion, it significantly changes the sound - as if someone turned on the Equalizer without my knowledge.
Focal ANC - not much further - but it changes a lot in the sound.
I made a comparison of Elegia, Celestee, Bathys - the latter is not a progress and successor to older models. Try it too.
The sound from Focal Bathys is like (in a very simplified way) a photo on a smartphone, the grass is unnaturally green and the sky is blue more than a crayon in a pencil case - and I may like it, but it doesn't suit me at all, I want to hear (I try to get it on my equipment) the music most faithful recording.
And if I want to change its sound, I'll do it myself.
Comparing its operation ANC in Sony, Bose or Apple headphones .... this function poorly mutes external sounds.
But in my opinion, it significantly changes the sound - as if someone turned on the Equalizer without my knowledge.
Focal ANC - not much further - but it changes a lot in the sound.
I made a comparison of Elegia, Celestee, Bathys - the latter is not a progress and successor to older models. Try it too.
The sound from Focal Bathys is like (in a very simplified way) a photo on a smartphone, the grass is unnaturally green and the sky is blue more than a crayon in a pencil case - and I may like it, but it doesn't suit me at all, I want to hear (I try to get it on my equipment) the music most faithful recording.
And if I want to change its sound, I'll do it myself.