Atmos Amaze demo, on a certified device. its mixed for reference, so you will encounter clipping if your amp is not up to the task, which is a nice bonus, and it goes through all the works, bass, imaging resolution and its short enough, that you have a chance to remember everything, when you compare headphones, and at some point you will know this better than any song

Edit: obviously you need a proper source for this, youtube is just mixed for -14 LUFS like everything else.

Demo Bluray, or a Pc with the Atmos for Headphones App