Unmistakably the worst headphone I have ever purchased. It sounds as if there is a veil covering the music and is preventing the music from being played its upmost artistic musical presentation.
DodgingBulletsI bought mine a few years ago, I like the design and comfort but not the sound. I agree with you, sound is muddy and unrealistic. I've used the Ifi Zen (drop edition for 6xx), Topping A30 pro, A90 d, and Schiit Folkvanger. Many DACs. Occasionally I'm entertained by the sound, but I always got bored quick.
I actually just came back by to check some specs :)