Cables all do something to the transfer of information. If what they do is not something our minds can convert into harmonically acceptable information, then it sounds inferior to a cord that only deals with information which can be acceptable in the real world. Aftermarket cords either smooth out the sound or make it richer. Generic cords add non-harmonic info that any critical listener finds to be 'wrong'....because it just doesn't fit.
The harmonic series fo any note is the fundamental, octave, third etc.....if you add something outside of that pattern it wont fit.
The harmonic series fo any note is the fundamental, octave, third etc.....if you add something outside of that pattern it wont fit.