If you read innerfedelity's review, they added distortions to the lowend to add more body to the sound and reduced the 6k somewhat, still the response is treble heavy and that outputs more of an in your faced detailing, and doesn't mean it's the resolving headphone. The boost of treble shifts the tonality to metallic side. 800s is still hasn't leveled their treble enough. Not worth retail or the high pricing.
The proponents of 800 argue the right amp is rquired to not sound shrill. The characteristics are shrilly sound. I expect balanced response at the pricepoint.