Initial impressions right out of the box were quite favorable, but after only 2 hours of assorted music/pink noise I can hear a vast improvement. I think the telling sign at this point is that I don't want to take them off, and this is listening to Metallica which I'm not necessarily a fan of (I mostly listen to jazz and classical, but I play bass in a rock band).
Now Smashing Pumpkins are playing (Bullet With Butterfly Wings), tom drums sound full and punchy, bass is perfect, very full sound, very much in my head, not super wide, but wide enough. All instruments sound good. Vocals are full. Bass is very present, but not boomy, perfect. Dang, turn it up : )
More Metallica (Enter Sandman). Very full. Very clear. Punchy. Kick drum front and center. A real head banger song it really does sound good.
Ok, enough of that..... I need some jazz..........wait, Peal Jam (Even Flow), again, very full. Vocals and guitars are perfect. Drums cut through, and the bass is perfectly balanced where it needs to be (I play bass). Good texture on the bass guitar. Everything is balanced really well. The top end is clear and present and distinct, but never hot. It doesn't hurt to have it loud.
Ok, here's some Samara Joy (Can't get out of this Mood). Again, nice balance, man, the stand up bass is so sweet, the texture is spot on, vocal is full, drums are sparkly with nice cymbal splashes and piano is full and clear. Perfect. Here's Laufey (Falling Behind). Again, the bass is incredibly full and deep, but not boomy, just full. Vocal is spot on, centered and the perfect level and tonality. What a pleasure to listen to.
Well, that's enough for now..... I think you get the idea...... it's been a bit over 2 hours since I unboxed these and so far they sound amazing. I haven't heard any sibilance in the vocals, and yet the highs are all there, clear, clean and sparkly, and the bass..... oh baby, the bass..... man oh man, the bass, seriously. I can't wait to try Flight of the Hippo.
By the way, this is all just listening to Amazon Music HD on my 2011 Mac Mini going into my Focusrite Scarlett 18i0i20 audio interface, which has two headphone outputs.
Oh, the soundstage...... it's very song dependent, but at this point, it's reasonably wide, but not the super wide I heard with the HEK1000v2. I'm not getting a lot of depth front or back right now, mostly on a plane going through my head, but I will say this, all the instruments are easy to pick out and are solidly placed and very distinct on that plane.
I'll report back Sunday night with an update.