I'd say the Univalve will "Wake up the neighbors" for sure. In my opinion it's not a bedroom amp and I don't think it was designed for that, although THD's literature seems to be suggesting this. I ran it though an Avatar Cab with a Vintage 30 speaker and a G12H Speaker and it was way too loud for my townhouse. The built in attenuator isn't really designed to bring that amp down to living room volume. The attenuator is pretty much useless for anything other than shaving off a little volume. Yes it has the roll channel, but I never found it inspiring.
For me, it's a very bright amp and it's very unforgiving. What I mean is every little mistake is magnified. Playing the Univalve for me is like walking a tite-rope. I can't just relax, play my 3 chords and sound like a rockstar. Also, there's a certain harshness to the univalve, that I couldn't dial out or make go away with tube swaps.
I did try a used Univalve recently through a 4x10 Marshall cab and it sounded pretty good. This was at a guitar shop and I was able to crank it. I'm pretty sure it had the stock EL-34 tube in there.So who knows, with the right cab, it can be a cool amp, but not really a bedroom amp IMO. I couldn't get it to sound good with pedals, did tons of tube swapping, blah blah blah. For the life of me, I don't know how they got their soundclips to sound so good. That's what sold me on the Univalve. I'd say try one firstl!
For now it's in my closet along with the Avatar cab. At home I play a Reverend Goblin with pedals. But I'll keep the Univalve for the future. You never know I may love it someday.