I haven't heard a power cord cause any difference on a source or pre yet--though I haven't done a ton of testing on those two components. I've heard some fairly large differences on a power amp, but I suspect williewonka is correct. Even the Argento Flow Master Reference made no difference on my Sanders Magtech when compared to Groneberg Quattro Reference.
I've tried Shunyata Alpha HC (~$1200), Cerious Graphene Blue ($550), Groneberg Quattro Reference ($200), Argento Flow Master Reference (~$6000), Acoustic Zen Tsunami II (~$300).
I've tried Shunyata Alpha HC (~$1200), Cerious Graphene Blue ($550), Groneberg Quattro Reference ($200), Argento Flow Master Reference (~$6000), Acoustic Zen Tsunami II (~$300).