Audiophilepure

https://audiophilestyle.com/ca/reviews/zmf-atrium-headphones-review-r1137/

Looking beyond the frequency response, the Atrium’s channel matching (like both the Vérité’s and the Utopia’s) is excellent. In terms of distortion, my measurements show that that the overall level is roughly the same between the Vérité and the Atrium, with both having slightly less distortion than the Utopia when tested at my approximately 85 dB frequency sweep level. The big difference, though, is that the Atrium’s distortion leans much more towards the second harmonic. Whereas third-order harmonics compete with the second-order ones, particularly in the bass, on both the Vérité and Utopia, the second harmonic dominates across-the-board (including the bass) on the Atrium. While I don’t want to read too much into such low-level differences, that might help explain why the Atrium’s bass sounds so smooth and clean.

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