I know this is a kind of ridiculous question, but as I haven't heard the 3A and some here have, I'll ask...
As the JH13s scale so well, you can kinda separate its uses as portable, transportable and non-portable. I got equipment for all three (mostly thanks to Apple & HeadAmp), but I find myself rarely covering the middle ground. Basically almost always either use the JH13s straight out of a DAP/tablet or want a home DAC to soar. So while definitely steps up adding a portable amp and then USB powered DAC, I just don't find myself carrying them around much. Really go portable or quality. And since picking up a used DA10, and it's damn good single box solution with the 13s, besides the AC requirement, don't find it much more inconvenient to carry around in a backpack than a portable amp and portable DAC and cables.
As a few of you know I have a JH16/3A order in (made before I received the JH13s - I know, I know), so here's the question - for those who've heard the 3A (even in meet conditions, in the compromised setup and obviously an earlier version - it's a big stretch to even approach a guess), is it completely unrealistic to expect near Parasound 1X00 (with Pico Slim or GS1) or Lavry DA10/Apogee Duet (single box) quality directly out of the 3A (assuming bumps on IEM end)? I know it's unlikely one has heard half these scenarios. Just wondering if the level of quality is extremely unlikely to be approached? Or rephrasing, from your gut reaction, is the 3A+JH1X likely (from few clues you've had) a bump of the standard JH1X, or a real equivalent of a home standard JH1X system? Were there glimpses of the latter in your tests?