29
    0.,    5.,   10.,   20.,
   25.,   30.,   40.,   50.,   75.,  100.,  125.,  250.,
  500.,  750., 1000., 1500., 2000., 2500., 3000., 3500.,
 4000., 4500., 5000., 5500., 6000., 8000.,10000.,15000.,
20000.
-50.0,  -30.0, -18.0, -10.0,
 -8.5,   -6.5,  -4.5,  -2.7,  -1.0,   0.2,   0.4,   0.0,
 -0.3,    0.5,   1.2,   3.0,   4.5,   9.0,  11.0,   9.0,
  6.0,    6.0,   6.0,   5.0,   6.0,   3.0,   3.0,  10.0,
 20.0


HD580 headphone reasponse (2005)
0, 5, 10, 20 & 20000 Hz points are made up
The numbers are deviations from a flat response at the eardrum
assuming a nominal sensitivity of 104 dB SPL for an input of 1 volt RMS
