A cable, by physical definition, has the task of carrying an electrical signal through the movement of negative charges called free electrons, in our case, from the source (e.g. CD player, turntable etc.) to the user (e.g. Amplifier etc.) for SIGNAL CABLES;
from the Amplifier to the Speakers for the POWER CABLES.
The flow of electrons will be conditioned primarily by the CONDUCTIVE MATERIAL OF THE CABLE, (Eg. Gold more conductor than Copper. Copper more conductor than Steel etc.), but also by the LENGTH OF THE CABLE (The longer it will be the more resistance it will oppose), from the SECTION OF THE CABLE (the thinner it will be the more resistance it will resist), from the TEMPERATURE OF THE CABLE (the hotter it will be the more resistance it will resist) from the POSITION OF THE CABLE (the less linear it will be therefore wound in coils, the more it will generate electromagnetic fields that will increase resistance).
So in our case, the flow of electrons carrying the musical information must start from a point A and then arrive at a point B, trying to meet as little resistance as possible.
The resistance, which increases for all the causes described above, opposing the flow of electrons, causes a degradation of the musical signal because part of that electrical energy becomes thermal energy.
In simple terms, the more resistance we have, the more a small part of our electrical flow, instead of becoming sound (mechanical energy), will become heat that will be dispersed.
Having made this necessary premise, it can be said that:
starting from a good conductor (simple copper) containing the length of the cable (a few meters) which must be of an acceptable thickness (2.5 or 3mm), unrolling the latter then keeping it linearly and away from heat sources, we have the certainty that the degradation of the electrical signal from point A to point B will be negligible.
The CABLE, which must be shielded, CANNOT ADD ANYTHING TO THE SIGNAL, it can only avoid its degradation.
All the colorings on the bass, on the highs, on the mids ... are positive aspects. Let me explain:
Having ascertained that it cannot be the cable that adds, EVERYTHING YOU FEEL MORE, indicates a lower degradation of the signal from start to finish. It means that the musical information arrived intact, without losing part of the bass, midrange, etc.
In conclusion, I want to say that a few tens of euro cable is more than enough for our audiophile purposes.
When we say that a cable opens the sound, we enter the PSYCHOACOUSTICS, (attention ... in which I believe a lot).
The engineer Giussani, father of the legendary Esb series 7, conducted many experiments on PSYCHOACOUSTICS and he came to the conclusion that if you spend a lot of money on a cable, the brain with the belief that it hears better will process the sounds in a better way; because the way of processing sounds is subjective, like that of processing memories, (each one will add to the memory of the same event details and discordant nuances with respect to another individual, only for a different cerebral processing, conditioned by the mood of the moment ).
In conclusion, to hear better,
Each pocket has its own cable.