No you cant. Thats the point. These tests are elaborate for a reason - its called proven scientific methods. That is what built valves transistors and put men on the moon - not relying on subjective techniques.

Differences due to the lcr characteristics or shielding and their interface with the two conencted units. And thats all. nothing worth more than a couple of quid per metre and the effects are usually small. I camn hear a difference between cartridge and phono stage if I use cables of differing capacitance - but that is to be expected given the well understood parameters of the setup.

The only pseudo scientific clap trap belongs to those poo-pooing scientific method in favour of "cable poltergeists".

Plenty of things thought to be obvious have been shown to be incorrect - like the earth being flat.

If you did enough tests with enough people and the right methodology you would find the difference in any component if it existed.

There are very definate limits on changes the human ear can hear - say 0.1 2nd harmonic or 0.5db loudness change etc etc. I am afraid our ears have no special status and are really only very good at tasks that aid survivial  specifically communication. I could very easily change a signal and noone on earth could hear the difference.

Isnt the net energy tansfer due to the load? With zero load and a super conducting cable their would be no loss at all right?