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?


@rodman99999 My ed is in applied math, signal processing and hobby is DYI audio. I don't specialize in avionics, it is just I tend to look up what is used in real advanced cases. Just to be sure there is no Barnum... I've seen "big box" fancy looking gear, but when opened it was basically empty inside with 3"x3" poorly soldered board and unshielded power supply. But it costed $$$. So I always check the engineering side.

There is a list of MILSPEC cables that list material, shielding, etc. So it is handy to check if that exotic metals cable wrapped in Japanese silk is truly necessary :-) 

Enjoy your snake oil. Anyone who says high priced power cords or speaker wire changes the sound is lying, ignorant,or a victim of confirmation bias.

@squared80  (et al)-

Enjoy your snake oil. Anyone who says high priced power cords or speaker wire changes the sound is lying, ignorant, or a victim of confirmation bias.

            Another rerun, since so many of you are a waste of keystrokes:

Cargo cult science is a pseudoscientific method of research that favors evidence that confirms an assumed hypothesis. In contrast with the scientific method, there is no vigorous effort to disprove or delimit the hypothesis. The term cargo cult science was first used by physicist Richard Feynman during his 1974 commencement address at the California Institute of Technology.[1]

Cargo cults are religious practices that have appeared in many traditional tribal societies in the wake of interaction with technologically advanced cultures.

     Do a bit of research and you'll learn those primitives were limited in their understanding of what they saw with their eyes, based on their prior experience, education and BIASES.

                                                A rewind:

                 It isn't that the Denyin'tologists are ignorant.

               It's they're knowing* so much, that's WRONG.

                       *heart of the Dunning-Kruger Effect

                                              OR, two:

     The Church of the Naysayer Doctrine (like every other faith-based, religious cult) has as many dopes as it does Popes.   

     Bring up anything resembling SCIENCE/PHYSICS, dated later than the 1800’s and they become apoplectic, not having the formal education to comprehend the concepts, or- possible ramifications.    THAT would be hilarious, were it not so pathetic!        

           Gimme That Old Time Religion, Gimme That Old Time Religion, etc.

        At the very first mention of something as simple as Wave Function (a BASIC tenet of Quantum Mechanics), the Cargo Cult will label you a KOOK.

        But remember: they can only view/understand you, based on their limited experience, education and BIASES.

         They have overlooked the fact that, if not for the hypotheses/theories and experimentation, regarding Quantum Mechanics: a plethora of modern conveniences, medical devices and the gear they so love, would not exist.

          Had scientists, chemists and inventors shared the doctrines of the Cargo Cult (Denyin'tologists), there would be no semiconductors, computer chips, LASERs, or Magnetic Resonance Imaging devices (MRIs).

                                         Solid State amps?

                                     OOPS (back to tubes)!

                                        Your Smart Phone?

                                        FA'GET ABOUT IT!

                                         Your car's GPS?


    Then too: some may be willfully ignorant and just enjoy being contentious.

                        Others: obtuse, uneducated*, misinformed?

      *Typically, from what's been exhibited here: H.S. STEM, if that, would be a safe inference.

      Either way: the result, when the Cult begins its rhetoric, is a classic demo of the Dunning- Kruger Effect.

                                          But, I digress: 

       Bring up those pesky details, regarding the likes of QED, Dielectric Absorption, Poynting's theorem and possible application/effects, relative to frequency, that our musical signals are carried via photon or wave, outside the conductor and you're a KOOK?

         Again: the Cargo Cult can only understand anyone with an actual background, experience and education in Physics/QED, based on THEIR own beliefs, education, experience and biases

                                      Remember this?.

     One anecdote  that some may find interesting: their walks in the woods and how his father would encourage him to look beyond the fact that something in nature exists, into why and how.

     It saddened him that while attending college, during a visit home and one of their walks: his dad asked what he was learning in college.

     At that moment, Feynman realized: if he tried to explain what he was learning, there was no way his dad could understand.                               

                            It wasn't an insult or condescension.

                                                Just reality.

                                    Oh well: let 'em go build a runway!


          But: I'm a kook, because I believe in the SCIENCE, from which all that sprang?

           Einstein got that last one wrong (Quantum Entanglement), BUT- I still wish he'd been alive, when the Hubble Telescope proved, what he considered his, "greatest blunder" (his inability to bring symmetry to his field equation, without lambda).'s%20original%20equations%20had%20been,how%20the%20universe%20will%20end.                                            How about that?

Another example of a hypothesis/theory, with no way to EXPERIMENT/MEASURE, what you're sure must be there, in some detectable way, or another.

                                               Just for fun:

                                            Happy listening!



@squared80 this is not entirely true. First, often supplied power cables are poor quality. Cost cutting. Pass cables are pretty good actually, properly designed. Hospitals use medical grade connectors - so they care about better power connection, right?

There is indeed a LOT of snake oil. But there are also poorly designed power supplies…

Nelson has an excellent writing on how much Class A amp must weigh. And if weigh less, you are getting scammed. Because amo must have proper power transformers and headsinks and they weigh a lot.

All this demonstrates is that you are a sensible person who doesn’t automatically assume that because he paid $500 for a power cord it sounds better. Congratulations on having such good sense. The power cord mania is pure nonsense. I bought fancy power cords for all my components a few years ago and ended up selling them all because they made no difference in sound. They looked great, but I wasn’t about to turn my units backwards so I could admire them.