I don't know where you're getting all this stuff from without hearing it or at least seeing a measurement first. I can assure you the HD800 connected to anything has nothing on the original Orpheus. I consider the HE90 to be the best headphone ever made, with a few Stax HPs battling for the #2 spot. The HE90 is an extremely accurate headphone despite its reputation as being "too warm/romantic" etc. That character actually lies with the stock HEV90 (which I like). The HE90 doesn't exhibit that kind of presentation when paired with a more neutral sounding amp like the T2 or even Aristaeus. You guys can look up measurements for the HE90 and you'll find it probably has the flattest measuring compensated FR of any HP with an
extremely fast decay as well. It's as accurate as headphones have come thus far.
I don't think the included DAC is a big deal - it's more of an added convenience. If you look at the back of the unit you'll see there are analog inputs, meaning you can connect a DAC to it like any other amp. The same is true of the original Orpheus. I'm sure most serious audiophiles will use the unit in that manner, but for the rich guy who's buying it as more of a show piece they'll probably use the included DAC to make things simpler/more eye appealing.
On to my ramblings about this thing...
I think it looks pretty awful. It definitely looks like it belongs on a vanity in
Scarface or something. The marble makes it look pretty tacky, and the plastic tube covers make it look cheap. Not a fan of the permanent headphone box either.
The marble will make sure it doesn't block outside interference, so there could be instances where the owner gets noise entering the signal which is a joke at the expected price point. It also looks like there is no heatsinking or venting anywhere on this thing, so probably pretty limited on current. A poster here mentioned that this will swing way more voltage than the HEV90, but that doesn't really mean much in terms of sound quality. More voltage swing just means a higher max volume. Ask anybody who upgraded their super high voltage swing, low current Koss E90 about this. For a great read, check out JimL's posts elsewhere on the current demands of an electrostatic headphone. Of course, this may not be too current limited, but it's not looking good from the get go.
This is using 8x 12AX7 tubes. Does that mean those are the output tubes and this is actually using a solid state input stage?
I noticed the 8 pin connector, and the arc protection sounds interesting. I'll have to read up on how that worked in the ESL63s.
Regarding the headphone, the inner and outer grills look very similar to those found on the HE90. The pads on these are much thicker (in terms of outer radius - inner radius) than the HE90 pads, which are my favorite pads for comfort. Looking at the pads, these might have smaller drivers than the HE90. 2.4 micron thickness is an interesting choice and I'm not quite sure why Senn decided to go with a film that thick. The HE90 used 1 micron diaphragms, and Stax have usually used 1-1.5 micron (seemingly settling on 1.35 micron) thick diaphragms. In fact, this could be the thickest diaphragm on an electrostatic HP since the old round Stax (mid-1980's). The 100kHz thing is probably at like 20 dB down, since tests on diyaudio have shown the 6dB rolloff point for a diaphragm this thick is much lower.
One other thing that doesn't make much sense to me is their use of platinum for the coating. It's awesome that they're sputtering the diaphragm since that will get the weight down compared to a spray/liquid/powder, but there seem to be better choices. Platinum is pretty heavy (about the same as gold, which is what the HE90 used) but not as conductive as something like gold/silver/copper/aluminum. Stat HPs use a very high resistance coating on the diaphragm, so in order for those very constructive elements to achieve the same resistance you have to use much less sputtering and thus the moving mass of the diaphragms ends up being lighter. If they wanted to use an element that has a similar conductivity to platinum, they could have chosen beryllium which is way, way lighter. It seems to me the choice of platinum was more for marketing purposes. Maybe they saw 2 Chainz' Orpheus video and decided to market to the wealthy rap game.