Here is an concrete example why if you believe in equation, you're can be so wrong. Let's take an example of silver vs. copper. We all know silver sounds brighter compared to copper. But it's not so obvious if you believe in the equation. See below for the DC resistance of silver and copper which is a mere 2ohm per 1000 ft for 24-gauge. For a typical 6ft speaker cables, the resistance difference is a miniscule .012 ohm. For thicker 12AWG wire, that difference may even be smaller. The objectivists looking at the equation would state that 0.012 ohm is well below the threshold of human hearing. But it's not that simple since we can all hear the difference in silver vs. copper.
But here a curve ball. I build my own speaker. Now if I use a 2.0Ohm resistor on my tweeter, or a 2.012ohm I probably won't be able to hear a difference. Why is that? To be honest, I don't know. But I can clearly hear the difference between silver vs. copper.
OK, now you may say skin affect is what makes a difference. But if you use Maxwell equation to solve for skin affect, at 20KHz, the difference between silver vs. copper going to be even more miniscule. Objectively skin affect should only affect RF frequency. Looking at the equation you will conclude that it's all below the threshold of human hearing. But again we can all hear difference in silver vs. copper.
You see how the objectivists can be fooled if all they look at is the equation. That's why they believe in these so called "measurement website". They look at thing at only one dimension and make their own conclusion. But there too many variables. Too many that can be counted.
Silver and copper are the two most conductive metals known to mankind, with gold following behind in third place. The conductivity of silver clocks in at 63 x 10^6 siemens/meter, roughly seven percent higher than the conductivity of annealed copper, which stands at 59 x 10^6 siemens/meter. Measured in ohms, the difference in the resistance (the amount of electricity lost as a current travels from point A to point B through a material) of 24-gauge, 1000-foot-long silver and copper wire is minor. The resistance of the copper wire is a mere 2 ohms higher.