This is my third DT1350, and still no 'Facelift' version, which I may get anyway within a couple of weeks. On its own, it's the same deal as the first DT1350 I bought (April 2011), but not the second one (February 2012). The second DT1350 had a much looser clamp, and while that relieved the headaches, the midrange was even more dominant than the first DT1350. The extra-strong midrange was bad enough, but if the earpads didn't seal well immediately due to the loose clamp, the sound could be quite hollow.
So even though this third sample is pretty much the same as the first, the Audioforge 'Parametric' equalizer I describe in the review and video makes the sound one of the best I've ever heard. Note that this equalization does not attempt to make the headphone sound fundamentally different or more 'hi-fi' - the goal here was twofold: Relieve the 'constricted' sound effect that many reviewers describe, and push the midrange down some to lessen the hollow effect.