Well, this whole kerfuffle prompted me to experiment with my system. (BTW, I don't think the turtle meant that placebo doesn't work on him notwithstanding the inartful wording. My guess is that he meant is it doesn't work on him alone) My chain is Node 2i>Gungnir MB>Freya S>A3>6XX. Normally I use the balanced output to the Freya, but to test, i used SE out from Gumby to Freya and passive mode at full volume (essentially a pass through, no different than the Sys @ max volume electronically if I understand correctly, of the latter of which I offer no assurances). The Node's volume control was disabled, as it always is.
To try for a worst-case scenario, I picked a solo acoustic guitar track from one of the lowest level recordings I have (Anthony Phillips-Private Parts And Pieces II) called Nocturne. In high gain, Nocturne with the knob at 3 o'clock is just a little louder than I would choose, but certainly not uncomfortably so. After trying other songs on the album, while some are louder, none are uncomfortably so. Full volume is too loud, but still not to the level of distortion or discomfort with the volume. Changing the Freya to its highest gain setting (4x) with its volume still at maximum, approximately the same volume level as 3 o'clock in passive mode occurs at 11-12 on A3's knob. As an aside, using balanced out from the Gumby to Freya with maximum volume on the Freya, 3 o'clock on the A3 is unlistenably loud, distorting, and and has a much higher noise floor, not to mention starting to overload the inputs on the Freya (at least that's what it sounded like).
Using the title track to Beck's "Colors," my normal listening volume is about 11 o'clock with Freya in passive mode. Anyway, I think the turtle's assertions are plausible, even without a "fault" in the A3, especially with classical music. I really like the A3, and I like it in combination with the 6xx as well. Neither are perfect ofc, and the A3 is probably just not suited to that particular use case. I wish the A3 was a little quieter, but as a $400 combo with the 6xx , I think it is stellar if one wants a warm comfy presentation without losing much technicality-wise. The A3 works even better with the Sundara and Elex. But I don't listen to much classical or acoustic jazz. I have a suspicion that the turtle is going to have to spend a lot more $ to improve upon it though. And the market tells me that his experience with Schitt is very much an outlier.