Oh, I'm sorry, I was under the impression that no one has heard or measured the cans that don't exist yet. Dr. Fang would totally use inferior tech to make his new headphones. He surely is sacrificing sound for weight. how stupid of me.
I just have a problem with people identifying the single driver tech as inferior. its different. just like a 4 cylinder vs 6 car. If the designer knows how to work with the medium, thats what matters. just because other single sided magnet cans exist with more distortion, doesn't mean that these will. They might, but we don't know that yet.
In threads like this, assumptions are made from small bits of knowledge, and then become expectations, then exist as misinformation.
In all fairness, HE-560 will probably have more distortion than the HE-500. But that is only one aspect of percieved sound quality. There are many other, more important sound qualities. It certainly will sound different; but worse? I don't think so. Why would Fang shoot himself in the foot?
Also, unlike the HD600 vs. HD650 relation, allmost all Hifiman HE series products improved over their previous versions. I expect the same to happen <crosses fingers>...