I haven't been able to differentiate between cables no matter what I tried. The only difference I saw was between some old thin oxidised copper wire and proper 12 guage oxygen free wire. Any wire above 12 guage to me sounds the same. I've tried using gold plated Ecose (from a friend) and my ordinary copper wire and seriously found no difference.

Nor did I find any difference between silver plated RCAs and ordinary steel RCAs.