Hello!
I received my ASX 3 days ago now and I still have mixed feelings about it. Out of the box the experience is not great: KZ went too conservative with the treble and overemphasized the bass with the tuning.
Perhaps they've toned down the treble in response to a common criticism I've read of their offerings. And, I suspect they boosted the bass in response to the criticism that BA's don't present the impact of a DD. However, in both instances they've overcompensated with the ASX.
All is not lost, though, as EQ levels them rather nicely. I do highly recommend the following, which, of course, can be adjusted to taste:
https://github.com/jaakkopasanen/AutoEq/tree/master/results/crinacle/harman_in-ear_2019v2/KZ ASX
Honestly, at this point I'm actually considering selling them, not because they're awful, but because they're not as good as they should be at this price. The ZAX, their current hybrid flagship, best them easily. Granted I EQed my ZAX as well after receiving it, but the adjustments are nowhere near as pronounced as those used to retune the ASX.