When I say that cables can’t add anything, they can only subtract, I’m pointing out the passive nature of wire. It is not an active component;Take a piece of shungite and put it on the amplifier cover over the transformer.... Shungite is a "passive" piece of minerals....And observe the compression of the sound....
Now take a big chunk of quartz and put it on the same location and observe the clearing of the sound, a decompression but with too much accent in the higher frequencies now....
Third experiment put them together and report here your experience...
You will forget after that about ready made "scientific fact" about "passive" wire that are only engineering prejudice... You will discover why copper cable and silver one differ and can ADD something indeed....
:)
« "Science is history of science" said Goethe, i will add science is, at the beginning like at the end, nothing else» -Groucho Marx