This is far from a review, but my impressions from the first few days of listening to them through Doug's Bridgeport transformer are overwhelmingly positive. These things are too expensive but they are the real deal. All I really care about is detail, so I was willing to give up bass extension in the SR-1a and, to a lesser extent, the CA-1a, but here there is no need for a trade. They are every bit as detailed and incisive as their siblings but with very present bass extension. These do not struggle with an open "B" string on an electric bass, which is ~30 Hz, and that is fucking impressive for a nearly massless ribbon you strap to your head. I'm awfully impressed and therefore given to hyperbole, but they might be the best headphones I've ever heard (I have not heard the HE-1). They are certainly my favorite.