I haven't messed with EQ on my 8XX. I'd be glad to try it out sometime soon and report back if you're truly interested. I'm a bit of a purist for the most part, except for my DT990. I appreciate the differences in the way my headphones sound and I like to swap them out depending on my mood. I do kind of wish I'd spent a little more on the 800S just because of all of the talk about how much better it is, but I find the 8XX to be fun in its own way. There's a lot of criticism of the 4-5dB scoop in the upper mids, which can make vocals sound a little distant, but it doesn't bother me nearly as much as the peaky treble on the 560S that nobody else seems to be bothered about. I think people were hoping the 8XX would be more like the 6XX where there was actually very little change in the sound from the 650, and the disappointment really soured the 8XX.