I've been playing around with some PS Audio cords (Plus and Prelude) and a couple of MAC cords (HC and Source). I have a very hard time hearing any significant difference between any of these on my Denon/PS Audio/BAT/Von S set up. Now I note that my system is fed by a dedicated line to which I attach a PS Audio PPP which regenerates a clean wave, so perhaps the power is pretty good by the time it feeds the cables to my components. I feel the MAC and PS Audios are a 'slight' improvement over stock and I could not distinguish between these two makes in the dark if forced, so I'd love to hear a cable that really was clearly noticeably better, cos I'd buy a half dozen of them --- but has anyone out there done an unsighted test on the cables they are using (please calm down before replying if blind tests irk you)?