The Mojo thread is a crazy hellhole of headphone enthusiasts yelling at random for twenty posts an hour and the Pure II thread is a step too far in the opposite direction, so I'll report my findings here. Maybe they're of use to someone
What you've heard is correct -- this is the Pure II / Mojo and it's absolutely tremendous with the Laylas.
I've been looking for a perfect (for me) source for the Laylas. I think I might have found it. I've had the Mojo for months now, but alone it's amp section is unsatisfying for me. The Pure II arrived this week. It was suggested by people on this thread, on the Mojo thread, by Headfonia and in a couple of other places too. I haven't seen too many Pures around, and not for lack of stellar reviews. I think it's mostly got to do with their one month production + delivery time and the fact that units don't appear on eBay or Amazon.
Things got off to two false starts. First I had the wrong gain setting. A tip: use the medium gain. The low gain doesn't play well with Layla's crazy 12 driver system.
Then for the next three days I fed the Mojo straight from my laptop with a finicky USB cable. I still wasn't 100% sure if the Pure II outperforforms the Cayin C5. That was stupid-time for me. Tonight I borrowed an AK100ii and used a Silver Dragon toslink as optical out into the Mojo. Huge difference. I'm a man of words and the sound is hard to describe for me right now. If I say "perfect" I'd be
1) lying, coz' nothing ever is and the Chord Hugo (which I haven't heard) is surely better and has a wider soundstage than the Mojo and the Cavalli audio liquid spark yadda yadda, 8000 euros, Ak380 copper edition
2) "Perfect" is a personal and temporary quality.
Nonetheless, the combo is close enough to call it perfect tonight. The Mojo / Pure / Layla trio sounds like what people imagine end game super audio will sounds like. It doesn't surpass expectations, like a perfectly driven planar magnetic playing acoustic music does, it fulfills them. This is the brain-rollercoaster I've been dreaming of, even before I got into audiophile wankery.
1) Nothing is a bottleneck for anything. No details are held back. The Mojo has a (within reason) perfect amount of details, the Pure II ads a volume knob and some dynamic impact to these details and the Layla performs them. No one drops the ball on anything.
2) For the first time since I got into hi-fi I'm not thinking about specific frequencies at all. The highs, mids, lows? What are those? The way the Pure II outputs sound into the Laylas, for me, is so uniformly good across the spectrum that I no longer distinguish treble quality from mids and so on. I realize I only think about treble extension if there's not enough of it, sibiliance if there is, mids forward or back if they're out of place and so on. I'd much rather think about actual qualities not shortcomings with this combo.
3)
Bite is it's nr 1 quality. The sounds, albeit smooth, emerge with great intimacy and strength. With the Pure II, it's like the difference between a note being played and not played is accentuated somehow. Sounds appear out of the blackness in a more sudden, forceful manner. It is the antithesis of distant. Like a thrust of the lance. Totally unveiled.
4) The music is a moving, integrated whole, an organic machine. It doesn't feel like walking around in an explosion frozen in time, a museum exponat, like much of analytical hi fi. I can hear details everywhere, but the amp wants me to focus on what the mix wants me to focus on. Hi-fi tends to unravel music, especially balanced armature drivers do. I didn't even know great fidelity doesn't have to just hang in the air, I thought integrated wholeness was a quality of bad systems. The Pure II reintroduces a psychoacoustic pecking order to the instruments. This amp knows what it wants you to hear more and pushes those sounds first.
So, are there any shortcomings? I mean, in the entire Pure 2, Mojo, Layla chain?
The Layla cable could be better. (This is mostly a quality control, ergonomics and aesthetics issue I have with the original cable)
Snug tips should fix comfort issues on the Laylas. Looking into it.
The Mojo? I don't see anything wrong with. 2 hrs more battery life doesn't fit into the current physical reality I'm afraid.
The Pure II? Soundstage could be wider and deeper, of course, but it's in no way narrow or shallow now. Also, I can understand how much of the involving quality of the Pure II comes from exactly a tighter soundstage that doesn't draw too much attention to itself.
There is one serious thing though, this combo is -- as of yet -- un-portable. You do not want to see what the ak100ii looks like, when it's riding piggyback on those two. It's hideous. As of now, two projects are in the works that might help me take this thing out for a ride. Chord is (hopefully still) working on an SD card reader module for the Mojo and Fiio is (also hopefully still) developing a low profile transporter they call the T3. Those two can't come too soon. I can't imagine how wonderful this trio will be in the fresh air, when summer comes. Waiting for the bus to come when the lilacs bloom.
I'm willing to wear a god damn fanny pack to make that happen.