Originally Posted by musicinmymind
HE-400 , The small soundstage with great separation think of it this way... the K701 would be like watching a 720p broadcast on a 100" projector screen, the HE-400 would be like watching a 1080p 3-D Blu-ray on a 60-inch 3D HDTV. Smaller screen but better details, dimensionality, and objects are more clearly defined.
I have not hear K701, but this is summary of what I read on few threads
Going by K702, I think that description would be very misleading to anyone that has heard AKG 70x but not heard HE-400...so possibly a poor analogy.
K70x is not without flaws, but I think that greatly undersells the AKGs. They're excellent headphones, technically on par with HD650 & HE-400 IMO. I tend to prefer them less, but that doesn't mean they're not equals. The soundstage of the AKGs is immense, but overstated. And the detail/accuracy is excellent. Where it falls apart is bass presentation and an arbitrarily shrill upper treble. And arguably uninvolving mids, but that's preference, and I tend to be surprised by them every time I pick them up in terms of how much I don't hate them despite expectation bias.
Both are highly detailed, however instrument separation and bass performance is clearly in favor of HE-400 as well as warmth and fullness of vocals. I think your original comparison plays too much on the common misconception about "K70x has too huge a soundstage." While it's true it's very wide, I think people are struck by the poor center image focus and feel it's artificial. HE-400 (and HE-6 for that matter) also lack a strongly coherent center image focus so it's sort of apples to apples. They just have a wider swing forward and behind the ear than does K70x.
Also I think the early HE-400 reputation for small soundstage was based on the pleather pads. With velour pads the soundstage opens up nicely to a fair size. We're not talking K70x or HE-6, but HD650, Dx000, certainly.