So as a total newbie what would be the reasons to consider this amp (have to add a dac as well) over the Schiit Jot w/ internal dac?
I was turned onto this amp by its initial Massdrop specs, then the verification measurements by Audio Science Review. People but amps for sound signature and power to drive headphones with plenty of power for dampening. We can all calculate the minimum power to make a headphone perform to a certain volume but I believe there are other factors in the transients that don't present themselves with those basic equations. Essentially, I like to have the extra power on hand to better control drivers and handle transients.
This amp has plenty of power in SE and balanced, has a "get out of the way" or "wire with a gain" signature which for me is desired because I like to isolate the sound of my headphone and DAC.
That being said, I do have a Liquid Carbon which has a warm signature for pairing reasons when needed.
The THX AAA 789 balanced output appeals to me for harder to drive headphones, it's non harsh yet neutral signature appeals to me (as I found the O2 cold, clinical and edgy), it's 3 gain settings allow it to work with a range of headphones and best of all, it's performance to cost ratio is outstanding IMO.
This is a good option for a high powered neutral solid state which I think would require a bit more investment to get something better performing which may not even be needed. Essentially, this could be an end game amp for many. These are exciting times as gear of this quality at this price widely available is a treat that people like me have been waiting for, for quite some time.
I can't compare this to the Jotunheim, but in my reading, I've had to many concerns with some impressions and the engineering with the Jotunheim and some other Schiit products. Many people love them and that's fine, I just feel, with them, the devil is in the details.