Revisiting me earlier comments, maybe Tyl's measurements should not be dismissed so quickly. About five days ago I was tempted to post on the possibility that the IE800 evolves significantly with long-term burn-in of hundreds of hours. Specifically, I no longer find that it has especially elevated bass. It has good deep impactful bass but the bass is no longer brain rattling. That was not the case when I first bought it.
Each to their own, but I don't see how "burn-in" would explain a >15db difference in deep bass between Tyll's and Rin's measurements.
Plus, there's up to 10db channel mismatch in the high range on Tyll's graph and Joker's report of treble ringing, making me strongly suspect that their unit is faulty.