Jitter for one is bidirectional. It causes harmonic distortion and uncorrelated noise.I'm not sure what "bidirectional" means. Do you mean "sidebands"?
Jitter does not cause harmonic distortion and that's the reason why is still audible in spite of very low levels. Jitter only produces additional frequencies NOT harmonically related to root frequency.
Yes, it is causing noise, but it can be correlated, uncorrelated or both. Uncorrelated jitter is a little less audible. Correlated jitter is less audible when sidebands are closer to root frequency (frequency causing jitter is low).
It appears that according to numbers nothing in cables should be audible. Skin effect, that starts at gauge 18 causes extremely small impedance change at 20kHz - frequency that I cannot even hear and where most speakers (being inductive) have high impedance. Capacitance plays very little role in speaker cables and the same goes for dielectric absorption. Inductive reactance, assuming both wire gauge and wire spacing of twisted pair to be 50mils, would be in order of 0.1ohm at 20kHz and 0.05ohm at 10kHz (that I can hear).
So, according to numbers, nothing should matter and all speaker cables should sound the same. The problem is that they don't.
Perhaps audio, like women, is meant to be loved, not to be understood?