I bought a used (dealer demo) pair of these cables and used them for several weeks. Then I sold them. I had the same experience as mrotino. They made as big a difference (not positive) in my system (PS Audio BHK 300 amps and Wilson Alexia speakers) as any other cables I have used or tried. I had to turn up volume on my preramp substantially to achieve the same sound level. Also, the tonal balance of the speakers was shifted upward, though not unpleasantly. What was more troubling was that there was a noticeable lack of bass relative to three other cables I compared them to. I don't care to use speakers cables that act as tone controls on my system.
Silversmith Fidelium
I have just purchased 2 Pairs of these cables,
I suggest trying a pair of these, They have a no Hassle return policy.
On Von schweikert vr-8, With bi-wiring I truly extended the lowend reach over my current cables.
Similar improvements in mids and highs