Installed the glass and spent some quality time with the Ultra Linear 70w tube head last night. Man, she's a beaut!
I have not spent enough time to really know this amp, but man, there are a lot of tones in there! Output-wise, it's right about where you would expect it to be, and more than enough to gig - with the right cab(s). It definitely gives a bit more clean headroom than most similar tube heads, and it sounds very full.
The Arkham was also able to spend some time with some friends. Man, these all-tube heads are so fun to play around with! They all have their own personality, and they all take tweaking in different ways. You definitely can dial in a good bit of similarity between them all (if that is your goal), but like I said, they each have their own voice and personality. This was fun! More fun coming, for sure... I definitely want to try the 70w vs. my Beast of Both Worlds.
These shots give you some idea of the size of the Ultra Linear 70w compared to some contemporaries. Each of those cabs had its own personality, too, of course. I did most of my comparisons pushing all of the heads through the 212AV.