scientific double blinded cable test

Cables are not about soundwaves and hearing. Loudspeakers, rooms
and brain+ears are. Cables are about carrying voltage that tells loudspeakers how to move air. Amplifiers generate the voltage and cables are supposed to carry  it as faithfully as possible to transducers.
That process can be a subject of scientific research. What goes into the cable and what comes out. People and their ears are redundant here. Really nobody has done it in the whole world?

Yes, that kind of research has been done. Sorry I can't point you to anything specific off the top of my head. Some of it has been done by cable manufacturers, who may choose to keep it proprietary.

“People and their ears are redundant here”

That’s a peculiar statement, considering “people and their ears” are the whole point of the exercise. Say you run tests & measurements on a pair of speaker cables, and tell me they are passing the signal perfectly. I then put them in my system and live with them for a while. If my ears tell me something is not right, or they are not as good as what I was using, I’m going with my ears.

nugat

... That process can be a subject of scientific research. What goes into the cable and what comes out. People and their ears are redundant here. Really nobody has done it in the whole world?

You may very well be the first to suggest that when it comes to audio cable research, people and their ears are redundant.  Perhaps you'll undertake the research that you're so surprised remains unexplored. If so, please report back with the results.

Soylent Cabling - Green Shrinkwrap....

People and their ears are redundant here