Could you please explain in more detail?
Please be a bit more specific.
What power cord?
What gear was it plugged into?
Have you done any room treatment?
Do you use dedicated lines,upgraded connectors?
Do you use any power line conditioning?
I can answer these questions.
Shunyata Annaconda Helix, Python CX
Acoustat tube servo amps, Cary 300SEI,Red Dragon mono blocks,DecWare Zen,Sme 10 power supply, Esoteric Xo3,Manley Steelhead.
ASC and DIY room treatment and some DIY difussion.
4 dedicated lines,20 amp breakers, Furutech R connectors, Furutech GTX D G inlet.
HiFi Supreme fuses in all components and WA chips on fuses.
Hydra 8 power conditioner for front- end gear, except cd player that on it's own separate dedicated line.
In my system,under the conditions outlined above,I can state emphatically that the shunyata power cords performed better than the stock power cords did.
I've done the comparison.
In no case with any of the components that I have tried them in, did the upgraded power cords fail to make an improvement in sound.
In fact even the stock power cord, when snipped of it's molded rubber connectors and cheap copper Furutech connectors added, is an improvement.
So that's how it workd for me, sorry to hear things didin't work for you.