Both my 007s sound excellent with the Carbon. The Mk1 is purportedly a power hog, and that may be true. I have not sat and done a track-by-track comparison with the two, but the Mk1 does seem to require a little more power. The Carbon has more than ample power to drive both to ear-splitting levels. I have not done any modding of my 007 cans, but I plan to. The Mk1 seems to have more bass oomph than either the mk2 or the 009. I am on the fence whether this is better bass or not. At the risk of sounding like a salesman, I have yet to hear anything "bad" out of the Carbon. Just a superb amp.