Very interesting, always wanted to know about this So if I understand well in a mixed 4 core configuration : if I solder silver on the positive and copper on negative = do I will benefit from the silver sound characteristic ? if I solder copper on the positive and silver on negative = do I will benefit from the copper sound characteristic ? I remember bought in the past (or dismantled) some mixed cables on which most of the time even 8 cores were not mixed properly (silver only for the ground, for exemple). Do you have good brands to recommend to avoid that maybe? Many thanks in advance, Cheers'