Why don't you stop it and understand that the measurement of distortion of amirm in this site, are not realistic -20dB harmonic distotion on 2k.
All eggshape Hifiman's doesn't have distortions, and maybe probably be the microfone or just amirm making some authentic noize.
Look at this, think again. You distortion believers.
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It is a truly world-class sounding headphone, a closed Susvara said by expert audiophiles.
If you don't believe me go check else sites of eggshape hifiman and the like of -Soundstage solo measurements.
I'm a very happy owner of HE-R10D and EF500 which produce some serious sound. Not your kind of eyes-watering ultra low inaudible distortion and everything. And i used to be here and buy lot of things which doesn't sound nearly as an EF500 and i still watch. But this flawed measurements are outrageous.
The hell is going on with Hifiman distortions here. Be blind then if you want, make your judjes and mistakes. This is now 1599€ open box and the top class of closed backs.