So far what I got from McIntosh rep from CES:
1) It's being made by Beyerdynamic. They are not sure what drivers are going to be used. I hope at least tesla drivers for such huge price tag. It's closed back and I hope it wont have harsh high as T5 does.
2) It's currently very rougb prototype, very far from being finished. So do not disappointed with looks just yet...
3) The release date target is late spring, probably April or May.
Subcontracted!? I figured that McIntosh® would design and manufacture the MHP-1000 in-house, as I understand to be the case with the legendary LD/HP™ transducers used on all their home- and mobile-audio products.
I do not understand the negativity toward this. I believe people at McIntosh chose a wise decision by letting a real headphone company to figure out instead of trying to make a 'flagship' headphone by themselves (which is just ridiculous when they have nearly zero experience on making headphones.) Headphones and speakers are very different animals (actually microphone is far more similar to headphones than speakers, thus a lot of headphone companies also make microphones); there is no guarantee LD/HP transducers would work as drivers on headphones.
At worst, MHP1000 will be as bad as T5p (literally the worst case). If that's the case it still would be not such a bad deal as in general McIntosh's products are overpriced.
That said, for amplifiers it is purely in-house design since they know how to make a decent amplifier.
At last, this is the picture of the headphones I took.