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RE: Listen for yourself


It has been noted that the use of negative feedback can reduce second harmonic distortion, however Dr. Earl Geddes (among others) has noted that added second harmonic distortion is relatively difficult to hear compared to other types of distortion. The second harmonic is an octave above the fundamental and harmonizes with the fundamental which makes it difficult to separate in our perception from the fundamental. While negative feedback reduces the second harmonic, it can actually increase higher odd order harmonic distortion. As the second harmonic is the biggest number, reducing it makes the total harmonic distortion number look better at the expense of increasing higher order odd harmonic content which has been shown to be perceived as unmusical. But you don't have to believe me on this, Jean Hiraga wrote several articles examining this subject going back into the late 70's and 80's which we didn't get here in the US unfortunately until the oughties when they were reprinted in AudioXpress. See the link here for the Amplifier Musicality article which was followed by rebuttals from two experts, and which was followed by a rebuttal by Hiraga with no rebuttal to Hiraga's rebuttal.


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  • RE: Listen for yourself - Paul Eizik 07:46:12 07/08/17 (0)


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