Will be sending them to the next in line on Monday...It was a real pleasure that Oppo put together this, and make it happen, really a nice gesture, and one of the best headphones I have had my hands on, construction wise, they are built like a tank and extremely comfortable, detachable cable is a very good idea, and the cable is very well built as well...!!!!
I will not do a lengthily review, as honestly they didn't make it for me sound wise, and I hate to be a detractor on a very good attempt...and on top I'm not very good on reviews either...
My short impressions, a very well built headphone, the best probably I have ever seen, but sound wise left much to be desired for a planar drive IMHPO. I was expecting something a lot faster than my Editions, and that never happen...it may be good for many head-fiers that prefer a more darker, laid back sounding headphones, but not for the R-10, Editions, CD3K, or electrostatic lovers...whomever is looking for a forward presentation, and sparkling highs and deep bass, the Oppo will not be the answer...
Having said that, I'm still looking to replace my Editions...And hi-end headphones are not easy to audition in stores, so...keep on looking...
Thanks for the impressions. I agree that they're not for people wanting a more forward sound. They're on the warm side of neutral, which is part of their character.
You might want to keep your eye on the ENIGMAcoustics Dharma. (In order not to derail this thread, we can discuss in that thread if you've any questions.)