No such thing as a flat graph in the world of headphone measurements. I'm not sure, but those graphs may be taken on the Neumann KU100 head; which is not at all like my head in terms of what the output looks like. Really, you can only compare those measurements one against another. I wouldn't worry about the dip; I would worry if we say lots of variation in the plots from Audeze.
3/9/16 at 5:47am