Why manufactures don´t burn in their amps and ...

Thanks for that, Ralph! That's the most concise and clear explanation I've read on the subject.

A couple of questions:

What accounts for a 3-volt drop across an AC cord? How does that happen? Is this an argument for shorter power cords? Is it all in material and design?

Why/how can one power cord dump more current at the peaks faster than another? Isn't this limited or affected to some degree by the power source (the AC), and how that source is delivering power? I think (perhaps erroneously) about the analogy of a hose delivering water - no matter whether the hose is fat or thin or obstructed or not, it will always be limited to some degree by the delivery of the water from the spigot. If the water is being delivered in spurts and fits, the hose will not change that.

Every 200+ Watt per channel amp that I have owned came with extremely thick stock power cords. I think Ralph is on to something there. Power cords are important when it comes to high power output devices.

Power cords are important when it comes to high power output devices.

True. But along the lines of Mitch2's comment, all of the effects mentioned in Ralph's post can be avoided simply by having adequately low resistance in the path between outlet and power amp. Which often may not be provided by stock power cords, but can certainly be accomplished via a modest upgrade that does not utilize exotic materials and construction techniques and cost megabucks.

We have measured nearly 3 volts in some cases. In a 100-watt amplifier that can account for a nearly 50% DROP in power!!!

Ralph -- Can you elaborate on how such a large drop can occur, and if that would hold true just for tube amps with unregulated filament supplies, or for tube amps with regulated filament supplies and/or solid state amps as well?

Thanks,
-- Al

True. But along the lines of Mitch2's comment, all of the effects mentioned in Ralph's post can be avoided simply by having adequately low resistance in the path between outlet and power amp.

An indeed that is what I have found to be the mystery around those extremely thick stock power cords that came with the higher powered power amps (at least those that I have been familiar with). Thick cable was not just all rubber/plastic but they came with thicker wires too!!!

Stewie: "(Mr. T): this hobby is so subjective that when you have 2 audiophiles in a room, you will get three opinions."

That's nonsense. You will get four opinions.

True! After the first one changes his mind, the other one will follow suit.

Shadorne: And indeed that is what I have found to be the mystery around those extremely thick stock power cords that came with the higher powered power amps (at least those that I have been familiar with). Thick cable was not just all rubber/plastic but they came with thicker wires too!!!

Nice to see that at least some of our members can bring a sense of humor to this subject :)

-- Al