I personally do not believe in power cables (audio are different, they are inside the signal path) and unfortunately I have to agree with fewtch on that....LOL...snake oil mainly....
If you believe that the last meter of the power cable will improve the sound on your amp, go ahead and get it, the best you could afford, IMO they will not, and they can't, unless you have a dedicated power line for audio only, and super conditioned for that purpose only, in this case IMO you do not need the cable neither, any thick cable hospital grade or the like will work fine, I have some Quail hospital grade, they sell for about 10.00 or so, very good quality and well done, that BTW Jude forgot to review them, he got some of those also.......but to hook it at the cheap outlet of your home?...gimme a break!!! What about the thousands of Kms, from there to the power plant, mainly cheap bare copper and mostly all rusted, are you going to improve also those?