Well, uh, it seems much more complicated than I remembered: http://en.m.wikipedia.org/wiki/Tube_sound#Harmonic_content_and_distortion http://en.m.wikipedia.org/

Well, uh, it seems much more complicated than I remembered: http://en.m.wikipedia.org/wiki/Tube_sound#Harmonic_content_and_distortion http://en.m.wikipedia.org/wiki/Tube_sound#Harmonic_content_a...