Yeah Qualia 010.
I don't know how legit the graph is though, it was in a Qualia review somewhere saying how terrible the headphone is, and then they showed an FR graph with no sub-bass and square waves that look like that.
I've also read a review how terrible the Sony Z1000 and MDR-7520 are, looking at the FR graph saying dips and spikes etc. etc.
And then there are graphs that "prove" how much better the Thunderpants is to the T50RP, right rhythmdevils?