I'll start some initial impressions of the headphone, it's pretty closed in... the sound stage is not very wide at all an it's lacking a little bit in depth
how ever, within the rather small space it presents a nice level of tactility an detail, it does a really great job pulling out the Bass Track on Metallica's "The Shortest Straw" from the orignal CD master which is know for it's almost sucked out Bass Guitar Mastering, The bass it sounds closed in, though within that space is a lot of detail an a fair share of tactility
Now the bad news, moving to the HE 4... the sound LITERALLY opens up... a LOT an I have a better level of Tactility an sub bass presentation. An ofc the bass Guitar is present with my HE 4
the same is true of my Modded W1000X, it brings a better layered an more open sound stage at the expense of Sub Bass
I'll say that this is a very unique headphone for sure