The late Allen Wright, who was a well known designer of superb preamplifiers and phono stages, wrote in his "Tube Preamp Cookbook" that he or a panel of listeners could hear changes he made to a circuit that affected response at 750kHz! He also stressed the importance of wide bandwidth. His preamplifiers were typically hybrid designs, using one transistor for gain in his phono stages.
'Life Above 20kh' Research Paper, Harmonics (Overtones)
I happened across this study about sound frequencies beyond 20kh. Harmonics (I prefer the term Overtones)
http://www.cco.caltech.edu/~boyk/spectra/spectra.htm
Aside from the study’s purpose, skimming the text is fascinating, sends my/your inquisitive mind in many directions.
Think about your listening room when reading his extremely detailed measurements to ascertain/eliminate any external contributions to his measurements.
Check out the amount of sound energy beyond 20kh of various instruments, crash cymbals particularly revealing. Jangling keys also a surprise.
The comments about a Piano’s Altered Harmonics including the strings/sound board/floor, I found surprising. I’ve always known how difficult it is to record a piano, this must be part of the challenge.
Even though test subjects say they cannot hear the super tweeter, experimenters could measure that the super-frequencies were detected by ..... , awareness and the brain’s perception ability are different things
..................................
Overtones. ’Analog Gets the Overtones Rght’.
I’ve often said, after a whole lotta years, the only way I can begin to explain why I prefer analog, is ’Analog Gets the Overtones Rght’.
Reel to Reel, my noisiest format, is my most preferred source. LP favored over CD. Tubes over SS. Myself, and ANY/EVERYBODY listening here to comparisons over the years has the same preferences.
More reason to get our ears professionally cleaned!!
Elliott
http://www.cco.caltech.edu/~boyk/spectra/spectra.htm
Aside from the study’s purpose, skimming the text is fascinating, sends my/your inquisitive mind in many directions.
Think about your listening room when reading his extremely detailed measurements to ascertain/eliminate any external contributions to his measurements.
Check out the amount of sound energy beyond 20kh of various instruments, crash cymbals particularly revealing. Jangling keys also a surprise.
The comments about a Piano’s Altered Harmonics including the strings/sound board/floor, I found surprising. I’ve always known how difficult it is to record a piano, this must be part of the challenge.
Even though test subjects say they cannot hear the super tweeter, experimenters could measure that the super-frequencies were detected by ..... , awareness and the brain’s perception ability are different things
..................................
Overtones. ’Analog Gets the Overtones Rght’.
I’ve often said, after a whole lotta years, the only way I can begin to explain why I prefer analog, is ’Analog Gets the Overtones Rght’.
Reel to Reel, my noisiest format, is my most preferred source. LP favored over CD. Tubes over SS. Myself, and ANY/EVERYBODY listening here to comparisons over the years has the same preferences.
More reason to get our ears professionally cleaned!!
Elliott