Metro04, I don't mean to be confrontational, but certainly you have encountered performance improvements that make little sense from a EE perspective. I know full-well that we have different systems, rooms, tastes, and hearing. There is little evidence that can "prove" why power cords sound different, why interconnects sound different, why Sun Mook Mpingo disks work, etc. If some people don't hear such differences and don't, I attribute this to all of the above. I very much resent those who hear no differences dismissing those who do as not understanding "physics" or as delusional. It is entirely possible that they don't understand "physics" and that their personal biases keep them from hearing the differences.
If I hear a demonstration of a device or tweak that works, I don't want "proof" that it does. I would like to have some inkling of how it works, but concede that this is of secondary importance. When Lloyd Walker first told me to switch the direction of the fuse in my Walker modified AHT phono stage, my reaction was to be dismissive, but I tried it. He was right. I was also dismissive about dc voltage drainage and minimizing it by switching the ac cord. This also proved, at least on many components, to be quite important. I could go on and on.
If I hear a demonstration of a device or tweak that works, I don't want "proof" that it does. I would like to have some inkling of how it works, but concede that this is of secondary importance. When Lloyd Walker first told me to switch the direction of the fuse in my Walker modified AHT phono stage, my reaction was to be dismissive, but I tried it. He was right. I was also dismissive about dc voltage drainage and minimizing it by switching the ac cord. This also proved, at least on many components, to be quite important. I could go on and on.