Originally Posted by nikp
Hehehe, it's funny that the statement came out of someone in Team Objecti-Fi.
It's not, really. The frequency response should match a reference. Which reference is supposed to be matched isn't entirely agreed upon, and what shape that would entail depends on how the graph is compensated.
I think it would be fairly trivial to design a headphone specifically for flat frequency response by Headroom graphs. It just wouldn't sound neutral. Look at the HD800's graph. The treble peak isn't even as high as the mid-bass, but it's considered bright as hell. Frequency response graphs are good for comparison between headphones, if they're compensated the same way. They're not a good indication of neutrality unless you know exactly what reference you're aiming for.