macosxhints.com - A 'perfect' iTunes equalizer setting

macosxhints.com - A 'perfect' iTunes equalizer setting

Scroll down to "Wrong approach for audiophiles" to find a subtractive-filtering approach to the same effect: "Equalizers in both the analog and digital realm do subtractive filtering far better than additive filtering. When pulling the EQ down you are not creating the additive comb-filtering necessary to boost frequencies that do not already exist, so using this kind of approach is leaves more of the original audio intact and does not add as many artifacts to the signal."