...Having heard the Laylas out of an (admittedly much lower model) ak100ii and considering how woefully dark and underdriven they were, I just can't see how the same company is able to drive them properly with a device roughly the same size, produced around the same time. For my money, AK doesn't have it in them.
This is exactly what I experienced with my former AK240 that even had the RWA mod. I am going to give the AK380 Cu and amp a try in the upcoming SF Meet, but my expectations are pretty low. The one commonality I've seen with the great sounding amps is that they are all well below 1 ohm output impedance whereas AKs are all 1 ohm in balanced mode. I would rank the following that I have owned:
1a - CDM - Best overall imho and the built in DAC pairs perfectly. It is >95% as good as the 2 desktop combos below
1b - Liquid Carbon (Gungnir MB DAC) - Similar sound to CDM, but wider sound stage and depth. But some of that "magic" is from the GMB.
1c - Mjolnir 2 (GMB) - yes, dead silent at low gain. Adds a little more warmth and thickness. Great from some genres but not all.
4 - Pure II+ (Mojo DAC) - Highs have a little more edge and smaller sound stage
5 - Mojo - Nicely balanced, but smallest sound stage
Others I've tried and don't recommend
AK240 (RWAK) - noted above
iPhone 6s - not too bad, but you can get a similar sound easily with $100 IEMs. Compressed and slow/boomy low end
Onkyo DP-X1 - similar to AK240 and interestingly enough same 1 ohm output impedance
WA7 - way too warm
ALO RX (2015 version) - Too peaky and thin
Pure speculation and educated guess:
AK380 CU - don't expect any drastically different than AK240
ALO Continental V5 - should be great and a good price for those that just need an amp