Little comparo of measurements from a few of their recent models. They've got a specific sound in mind it seems. DQ6 is the best of the bunch imo.
I was interested in that and just checked ZAX vs Harman target curve(both normalised at 60db), and it looks relatively close. Even though 50-200hz seems to be more emphasised, and Harman target curve starts to fall at 200hz, KZ tuning seems to go all the way up to 400hz. Then an uplift from 1.5k up to 2.5k(if you'll play with EQ, you'll get why).
Blue - ZAX, grey - Harman target.
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