"Measurements, e.g., resistance, inductance, capacitance, are, these days, easily made , recorded and compared but are gross and crude compared to the kinds of phenomena which may be discerned by the human ear and brain such as, say, timbre. The simple measurements aren’t going to help us predict how a device (cable) will contribute to SQ."
Timbre is the fundamental plus the harmonics and can be measured. I’m not sure why it seems to take away enjoyment from listening to music if we can also understand, explain and measure what we hear. Take a single electric guitar note with a fundamental 96.5 hz and the harmonics 96.5 x 2 x3 x4 x5 etc.. These can be measured and shown on a FR plot, different instrument different measurements different timbre. If the resistance, inductance and capacitance of the wire differs by enough to alter the FR then it will affect the timbre.