Thank you wuwhere. Do you know if the he-6 and he-500 are the same weight? I think weighing them will be one test. Fakes seldom are made to great detail in use of exact materials. My concern now is hifiman's seemingly lack of consistency. Do you think the sound has changed much over the few years thy have been produced?
From their website, HE-6 and HE-500 have the same approximate mass, 502 g.