How Much Are You Missing From 20khz to 45khz?

http://www.cco.caltech.edu/~boyk/spectra/spectra.htm

Kr4
Do you hear any difference between a CD and SACD?

The SACD improvement over CD on most recordings i feel relates to improved digital processing and frequency response, that I easily hear on my Magnepan ribbon tweeters which go to 40 kHz. On phono, MC improvement over MM, more clearly relates to FR. IMO the difference comes down to more accurate complex harmonic structure in the audible higher frequencies under 20 kHz. Most all audiophiles prefer SACD over CD, and MC over MM.