They are PRS cables made by Van Damme Cables. They are a low capacitance cable. I bought an 18' and a 25'. They are on sale through the end of the year. I can honestly hear and feel a difference.
If I could, I'd bet you money in a blind test you couldn't tell the difference between your cables and my $175.00 G10 wireless system.
If I lost, you should donate your ears to science.