Soundwise, v-shaped and “consumer tuned,” with alot of extension at both ends and notably more treble detail and emphasis than the zs3. Source sensitive; these can sound somewhat veiled and hollow but opened up considerably through my lg v30, with mids moving forward and drums sounding more realistic. This is a bright phone and with most silicon tips treble can get very splashy at the extremes; foams will tame the treble but slightly deaden the rest of the spectrum. i hear the stage as fairly low and narrow, altho (like almost all KZs) imaging is vg. note texture isn’t quite as rich as the zsr/zs5 though bass is better controlled than either–upright bass in particular is well-reproduced. these lack the refinement of the trn v80 and the physicality of the multidriver KZ hybrids, but driver coherence may be better on the zs4 (probably because it’s design is less ambitious).

Overall, I’d rate them a notch below the more expensive ZSR, ED16 and ZS5 on the KZ pantheon, although they certainly have their virtues and may improve with further tip rolling.

MEASUREMENTS

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