EVERYONE!

Can we please get back on topic? OP says the peaks & pains in 6k range diminish when he pushes his HD800 forward so that the backs of the earcups just touch the backs of his ears. I have had not the exact same experience, maybe even something slightly contrary: I like the way it sounds when I push my DT880 so they are centered perfectly over my ears. Therefore, I have no choice but to call bullshit, and recommend everyone pony-up and upgrade their O2+ODAC with custom faceplates.

On a related, but more serious, note:

I have calmed back down.