I got my new PS500e last week, and I have been running them from my MacBook Pro through a BifrostUber/ Asgard2. They are very different compared to my original pair of PS500, that were too dull sounding for my old ears. The new version is open, with precice bass, glowing mids and great highs. I own a nice pair of RS1i, several AKGs and Sony for work ( I am a professional musician) and a collection of in-ears, my latest aquisition there was a pair of Shure SE846.
I had ordered a Set of RS325e for auditioning a few weeks back, but had to return them because the treble extension was just too much for me, but I figured that the new driver could work very well in the 500. And that is what it does. Very well. Magic. First Post. Just had to chip in. These things are amazing. Thank you, Grado.