I had the opportunity to listen to the Tungsten Double-Sided on a Schiit Mjolnir 3(?) today at the DC area meet thanks to
@Menkau-ra. Unfortunately, I don't recall which settings were used on the Mjolnir, as I only knew what it was afterwards by finding the amp on the Schiit website.
Overall, I thought the DS Tungsten has a "powerful", "weighty", and "forward"/"intimate" sound. It has powerful punch even at low volumes, almost like there's a bit of reverb after each bass hit, but not in a muddy or uncontrolled way. To me, bass attack and punch seems a bit slower than what I'm used to, like there's a lot of punch, but that punch arrives over a longer period of time compared to my reference. However, I generally listen to electrostatics, so my reference for subjective speed is likely faster than what most people use. Meet conditions aren't good for evaluating clarity and technicalities, but it didn't surprise me in any way good or bad.
Now for the "forward/intimate" part of the sound. Vocals are placed very close to me; it's like the vocalist is right up against the tip of my nose and singing at me from there. It's sounds like it's more intimate than even the HD6xx to me. But the lateral soundstaging is normal and not constrained in the same way. Thus the overall effect is akin to a band playing around me, but the vocalist stepping forward, going right up against my face, and singing their part from there. I don't like it.
Now, there will be people out there who will love this sort of presentation. There's a lot of texture to those vocals as a result of them being so emphasized. And it's not shouty in the way that something like the Audeze MM-500 is where the vocals (especially higher-pitched female vocals) can become scratchy or grating. No, it's a textured and rich vocal performance, just delivered from right in front of me. I prefer vocals to be more distant, so unfortunately for me, I could not really enjoy the Tungsten DS to its fullest, because I kept on being distracted and wishing the vocalist would just back up a few steps and get out of my face. So, not for me, but there's a lot of good sound here for other people to enjoy, especially if you like that sort of forward and upfront presentation to vocals.