I've never been a believer in burn-in, but this really goes a long way toward changing my mind. Honestly, I sent three people an email of my first impressions after 30 min, and if I wrote the same emails again after 3 hrs, they would be significantly different. I didn't really see what all the fuss was about at first, but now I do. Very interesting headphones!
Burn-in is real for sure, but it varies from gear to gear/ maker to maker it seems. Some change a lot while others change very little, not sure if it always changes for the better though. LoL But it seems that way..........................i hope.