Great post
@wolfxomg! BTW, I'm also a DUNU fan. DN1000 is very underrated. You'll love the FLC8n (or FLC8d, which has fixed - but IMHO, optimal - low/ultra-low tuning).
I'd seen that quote from Ken Hong before (it featured in some of our previous debates on this issue). I don't know what he means by "low-quality audio". Does it detect when you're playing Britney Spears? I suspect the dropping down to one pipe is battery-saver mode or quad-DAC-disabled mode.
BTW, you'd mentioned tuning. I've been trying to figure out what "Tuned by Meridian" actually means, since there's no difference in the FR (both V30 and V40 are ruler flat) and Meridian refuse to tell us anything about it. Do you have any thoughts or clues on how a device can have almost identical specs, ruler flat FR, and yet be "tuned" differently?