The EARS to Jude's GRAS compensation curve was arrived by the simply taking the average of deltas from the raw EARS HD580X and Clear to Jude's GRAS compensated measurements. The hardest parts were digitizing Jude's plots and linearly interpolating them to a standard set of frequency points. We will need more data points (more plots from Jude) to confirm how close we can really get.Looking back at the plots, the HD580X EARS measurement is missing that small bump at 8kHz. Correcting for this would increase the Clear's measurement at 8kHz, resulting in a slight peak there, instead of the null seen on Jude's plots. However, I strongly suspect the 8kHz null on the GRAS45CA is actually a peak in disguise - see here for discussion of this: http://www.superbestaudiofriends.or...s-and-what-they-tell-us.65/page-2#post-162886 I'll go through the data and confirm as I actually have my own measurements of the Focal Clear taken on a GRAS 45CA.BTW, I will be making all data public.