Perhaps more then 15 years ago I bought Harman Kardon receiver for my home theater. It was humming with sensitive speakers, and problem was acknowledged by company as a design issue. They sent 2 chokers to put on power cord and it somehow helped, albeit later they replaced power supply anyway.
Since then I never heard in my system any effect of power cords on any of my systems. I never tried 20K ones - but I tried PS audio, Shiniata, Pangea and Signal Cables. None of them to my ears caused any change. Now I use Signal Cables around as they are well made and inexpensive -but honestly I could not hear any difference.
Same with speaker cables - blessed with friend as neighbor who was constantly experimenting I tried several. Nada, regardless of amp and speaker. My last change probably an exception, from "borrowed for free" Nordost (not the most expensive one) to Canare 4S11 (I moved and had to return Nordost), which I bought on Amazon for less then 50 backs each (good looking and terminated) was the only one I could heard some difference, with Canare getting an upper hand. Probably.
Interconnects I could hear the difference, slight, but audible. With sound getting less pleasing with price going up - one silver cable was especially brutal. I left with inexpensive MIT cables as the most neutral and later changed them to bluejeans - without any audible effect to my ears.
At the same time I can easily hear the difference between speakers (of course), amps, preamps, dacs and even digital transports (I was shocked for example how much better Auralic Aries Femto sound was compared to OPPO 105 digital output using the same media server and DAC).
Is it possible that some of us "cable sensitive" and others are "cable deaf"? I clearly in the second group.
