Nice to see Amir measure these headphones. These are a favourite of mine. They do look a bit different in measurements than what we have seen from Oratory for instance (mainly above 4kHz), but of course there's unit to unit variation to explain some of that as well as somewhat different measurement protocols:
View attachment 176817
Distortion measurements were also lower on my HD560s that Oratory measured, and I found my HD560s to have the cleanest most defined bass after EQ, at least as good as my planar HE4XX in that regard:
View attachment 176818
Could this be down to unit to unit variation.
I'm a bit disenamoured with my HD560s as it came back from Oratory slightly damaged on the earpad and it doesn't seem quite the same to me now. I think I still have to rate it as one of my favourite headphones though, kind of wish I hadn't sent it in, didn't have this problem with other headphones I'd sent him so bad luck or somethings happened (packaging wasn't damaged in any way though).
HD560s is a nice headphone though & good value, it's got a good soundstage and does everything well, especially after EQ.