But re-reading my comment i realise it is still quite very negative. So let me say again that the Sennheiser Momentum are truly amazing and, to my humble opinion, far better than its equals from other brands (Sony or Bose, basically, and others) !! If you want an ANC, this one is i think the best one you could get, sound-wise ! (i think for ANC it may be Sony, but the sound isn't that good).

On the M3, the bass were perfect, you could feel the physical rumble when it hits low notes, without taking all the space and getting over the mids like the Sony's :). Its sound signature is still what i qualify as my preference, quite Neutral, with some nice quality bass.

The soundstage was very impressive for a closed headphone i found ! And i would have definitely bought the M4 if i wasn't annoyed at the charging part. And i didn't use it outside, so ANC is useless for me. This is when i realised that paying 350 euros on a wired/Non ANC headphone actually might give you an even better one if you choose wisely.

But if you're going to use it outside, then don't hesitate one sec to go for the M4 ! Personally i owned the M1, then the M2 and the M3 😂 and these ones made me become addicted to good-sounding stuff. You'll probably end up buying an audiophile headphone as well in the future after the M4 anyway haha.. It's the effect it does to you 😂