I confirm what is said about the Fry. I discovered as well the importance of the dielectricum. What I have done is to make 2 pairs of cables using Mundorf Ag-Au, same gauge, same connectors (WBT), but one pair is teflon isolated and the other is bare and cotton isolated, same geometry. It makes a (huge) difference (before and after Frying)!
batalok
batalok