By the way, here's what my more refined subjective perception of the HE560 FR is, superimposed over an actual FR measurement by ultrabike of Jergpad modded HE500s
Anyone who is even remotely familiar with reading frequency response plots should be able to imagine the sound signature. Really the main points of interest are the <50 Hz region, the 2kHz region, 4-6kHz region, 10kHz, and ~12kHz region.
Keep in mind ofc this is still purely subjective and by-ear (with some tone-sweep testing and comparisons), it's how it sounds to my ears, and the ups and downs are qualitative rather than quantitative.
Is that post-mod HE-560?