Thanks. That's a pretty big space, roughly similar to mine. I found my Moth S2A3 to sound wonderful at low volume--the best of any of my amps--but it started to soften on the bottom and strain on top before I felt the room pressurize. Didn't clip, exactly, just lost a little composure and suppleness.
Is your Triode Labs the 2A3 EVO integrated? If so, perhaps the Hashimoto trannies make the difference. Looks top shelf throughout.
I must say, your report is pushing me to put my 2A3 back in for another session!