Either I'm color blind, or am I seeing this correctly. This thing plows the 789 in low gain in terms of lower noise+IMD vs all levels? (Sure the power output isn't as high, but for someone like me listening to my RME at -5dBu Ref level, and 789 on Low gain, I could stand to use a volume knob I could operate beyond 12 o'clock). I did not see such a massive difference coming especially at lower volume which for me personally is a massive win since I seem to not listen to music as loud as anyone for the most part.
Also, I like the new 50mw Dynamic Range graph being paired with the 2V/4V(for balanced devices) graph on the left, nice work bossman! And nice work JDS Labs on not having any regression of already top tier performance here (many older amps simply do not play well with low power required IEMs, so it's nice to see more powerful amplifiers also taking this performance into account), while also still beating max power output at lower distortion than even the 789 in SE.. THAT is the kind of engineering that gets me going. Killing it from nearly all sides.
There are two problems I have though. I disliked it on the original, and I dislike it here. That volume knob could be nice to look at and nice to play with more than almost any other. But two issues I have:
1) My RME rests on top of my 789, and the gap between each is still enough where the 789 has dust on it. That volume knobs' junction on the El Amp between the case, and the space between the knob seems ripe for a whole ton of debris and dust to just fall down into it. My OCD is wanting to get rid of my 789 just because it has those holes on top front portion of the case where all the dust falls onto the interface parts of the amps controls (gain, power, input selector, and volume knob), and get a Monoprice 887 JUST because it's fully sealed (which the 789 should have been considering its very low heat output). The only thing is, I like the finish better on the 789 (simply more work has gone into it in its tidiness). I can only imagine going crazy from using an amp with a volume knob set on top of the device and all the dust falling down the sides of the knob.
2) The volume knob on the first iteration was just a big knob, while the actual pot itself wasn't of substantial size where it would pair harmoniously with the size of the great feeling knob. What that ended up producing was a dinner plate-on-a-stick balancing act where it was wobbly and not firm. In this form factor, I imagine the pot "stem" isn't substantially a larger diameter to make it less of a problem with the wobbling?
Regardless of those two personal complaints. People wanted a metal enclosure from JDS, seems they not only got that, but also the nice top volume knob design of their prior offering (so as long as you're not like me).
Though with SMSL's recent offering. It may be a hard sell if you're not concerned with "stackability"
Now give us balanced 
