I know we will all sigh with this post, not another claim that powercords can make a difference, but yes they can. And even on a turntable.
I plugged Triode Petes "American 8 Guage" Power cord into my Micro Seiki turntable and there was a subtle but noticeable improvement.
Tone was rich and clean and the soundstage opened up a bit, not tremendously so, but it was definetly there.
Why or how a powercord can affect the sound when all it is doing is powering the motor? I have no clue, nor care to know.
Way to go Pete! You should market a PC just for turntables!
Mike