I, too was afraid of laying down big money on a power cord. I laughed at a guy who told me he was using $3000 power cords. Then when I was in the market for a tube amp, I went to Audioreview.com. I read the reviews on one amp. It was very reasonable, but one person said the unit was world class when changing to tube x and powercord z. Never heard of such a claim. So, I then read the reviews on powercord z in disbelief. What the heck, I'd give it a try. So, I picked up a silver powercord here cheap, in an auction. I played my amp for 1 hour, listened intently, then hooked the new cord up. INSTANTLY better sound. And I didn't have to strain a bit to hear it. All that stuff about focus, imaging, bass, midrange, treble, etc. was all true. Dirt that I never even realized was there was removed. Yep, all these people were right. And, from what they say, the effects on an amp are much less than on a source component. I'm a believer.