New expensive power cord for amp and no change in sound?

I bought new an expensive(for me) well known and reviewed power cord for my very good amp and plugged it directly onto the wall socket. After a couple of weeks of daily use I hear no change in the sound quality from a $500 cord. I don’t want to name it for fear of getting my thread deleted. You would know it or at least be aware of the company. Did I throw away several thousand dollars? Before I get the snake oil answer I want to let you know that I bought an upgraded cord for my pre as suggested by the pre’s manufacturer and am pleased with the results.

I guess for full disclosure the amp’s manufacturer said don’t bother. But I had had good luck with the pre so I thought it would be a good idea.

Anybody else have this happen to them?


I own Pass phono stage, headphone amp. Used to own several power amps, starting from Aleph. I use fairly simple cables, properly shielded, soldered and have sufficient capability to deliver appropriate current without picking up additional RF interference. In $100 price range.

I generally think “what would be used in a fighter plane electric power delivery system”…

@eurorack of course if you change from a substandard, “crud” power cord to something that’s half decent you should notice a difference. That’s obvious. Crap is gonna limit anything in this world - power cords or not.

What we discussing in this thread is if there’s a difference between a $100 power cord and a $500 power cord and a $4000 power cord.


That’s very different from the experience and situation you are referring to, I think.

@mikhailark -

     I'm fairly certain; very little critical audio listening goes on in fighter planes.

     However: here's something that NASA selected, to conduct power, for their portable LASERs.




@rodman99999 - this is exactly what I mean. There is little critical audio listening in the fighter plane, but i am sure quality cables are selected to deliver power in environment full of RF interference and when performance may literally mean life or death. They would perform well in a less hostile conditions :-)


New video -- 2 Power cords sound test

1) click 3:51. This opens YT window.

2) In YT, make a small YT window (narrow & tall, right half screen) to see the video screen and 2 time stamps (3:51, 9:37 in description) are in the same screen.

3) Listen at least 1 minute each and repeat.

Just relax and feel what comes to your ears when you click.

** Please visit my room (#272) at THE Show 2024, OC. Costa Mesa audio show on June 7-9. Alex/WTA