I have an amplifier that cost more that 5 grand and the manufacturer told me not to waste my money. I don't know one way or the other, but I'm just sayin'. They did say an expensive power regenerator would make a difference, but at a significant cost that rivals the expense of the electronics themselves.
What I've always wondered is how the last 6 ft power cords can make a big difference when you can't do anything about all the power lines that run up to the power outlet. I once read an explanation about that (something about the last few feet make all the difference) but I remain skeptical.
