Quote:
LCD3 vs "HeadRoom's suggested 4db bump"
Few things:
"Headphones also need to be rolled-off in the highs to compensate for the drivers being so close to the ear; a gently sloping flat line from 1kHz to about 8-10dB down at 20kHz is about right.""
Your "perfect graph" doesn't accout for this. But under 1kHz, it's pretty good.
Secondly, this data is from...?
EDIT, playing around a bit with the prescription above for "natural sounding" headphones from Headroom and think this is the better match. I also included the "treble rolled off from 1kHz to 20kHz of about 10dB. The Audeze cans seemed to be voiced with this process in mind: