I have these and Monoprice's Xxx (triple drivers).
ZS10 is fairly neutral, you get bass if you stuff the buds really in, but leaving it slightly looser you get a very airy sound.
Can't comment on fidelity since I'm on Spotify, but on a really "messy" piece of music everything can be heard much clearer, vs my Xxx and my regular headphones. I used the same silicone tips on both sets.
It's impressive if you come from single-drivers with more complex music.
Have to say though it's cheaper on gearbest or taobao int'l.
ChaoticKinesisThose are normally present in IEMs as pinna compensation anyway. Lowering 2-4k region will severely muck up that KZ sound.
Completely flat measuring IEMs will sound really weird because you don't have that 2-4k boost to account for that.
malvinvnvYes, a bump of +8 dB centered around 3 kHz is considered optimal per the Harman target response curve. That's not the same as +13 dB at 2.5 kHz in a fairly wide peak. This is literally the largest peak I've ever seen on any earphone. Other KZ hybrids are in fact around 5 dB lower in their peak, so they're not nearly as harsh as the ZS10. I speak from experience, I own the ZS10 and it's the first and only IEM I've ever found painful to listen to at moderate volumes.