Fast power cables?

There is no doubt that power is critical for good sound. Just look at the extensive efforts that go into designing the power supply in amplifiers. I too am skeptical and have used different power cables to see what all the fuss was about. However this was after I had a dedicated circuit installed. I am honest and I did not here significant changes. It's possible that the PCs I used were not fancy enough but somehow I sincerely doubt it. I used Audience, Cardas, Various Custom made Ferrite shielded numbers from Subaruguru ( I think he left the audio scene) and even Custom made silver PCs.