I have the original version, and I was never really impressed. They are really small, but the sound was quite mediocre. I eventually used them for sleeping only (because sound quality doesn't really matter when you're sleeping). They have since died (bad cable). Supposedly the revised version is better, because they put a larger nozzle on which changed the tuning (not sure what else they did for tuning). @1clearhead is the most familiar with the 2 versions and their changes. More info here: https://www.head-fi.org/threads/chi...phones-and-iems.820747/page-659#post-13579773 https://www.head-fi.org/threads/kno...essions-thread.698148/page-1305#post-13640627 The new version has a "tag" at the end of the cable. Did yours?