Foreword: The Hibiki is a collaboration between Shozy and AAW, sporting a beryllium driver and fancy carbon fibre faceplates. I received one as an optional reward tier in AAW's indiegogo for their Capri cable. Frequency Response Impulse CSD THD Impedance Response Dead flat. No point showing a curve for this one. Analysis Channel matching is not the best. Left channel exhibits clear issues though are not immediately audible on subjective listening. Anomalies in CSD and THD in the left channel are repeatable (1k wall + distortion spike, 4.5k distortion spike) Tonality is off. Just an overall sense of thinness that throws off the timbre as a whole. (Looks like CSD shows this, but of course causation doesn't automatically mean correlation) Exhibits almost BA levels of D3 distortion Overall, do not recommend. The IEM itself is eyecandy for sure but there's no sugarcoating it, it sounds like absolute ass.