Power cord replacement suggestions


If i were to delve into the fanatic behavior of replacing power cords, is there some concensus on where the most impact would be gained, whether on source, pre, or amp, or is it just different for every system and need to experiment. Thanks for any advice.

128x128droleg
+1 droleg. 
As my mother said:
'If you have nothing nice to say, say nothing'.
But, that was a long time ago...
Bob

PS- I hope you can find a difference in sound with you new cables. I am in the process of switching out some power cords, if you like, you can try them.
I appreciate it, Bob. Let me get settled in with these and then maybe you can recommend something of yours to try.
And thanks Lak. I realize thet on a 20 a plug, one of the prongs is perpendicular to the other, but i wasn't sure if they used different sized conductors to handle the higher current. So much to learn. Enjoy your evening.