I’ve tried various power cables over the years (acoustic zen, Nordost, and morrow). They each made a clear improvement in my source components (cd player and streamer/DAC and preamp) but made little or no discernible difference in my class D amps (Be Canto ref500 monoblocks). I end up keeping the Morrow MAP3s because they improved the sound just as much as the others but they are so much more flexible and easy to route. I don’t know if it’s because Bel Canto has the power so well figured out or because the cables I’ve tried have the same sound signature as the Be Cantos with their stock cables. I’ve tried theee different cables on them, but haven’t tried Shunyata.