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?

roxy1927

Play a few specific tracks that you know well, understand what you are listening to, and then do as dill suggested. Power cord differences are very easy to hear through my system, used anywhere in the chain. 

Trust your ears. If you didn’t notice a change then your original pc was not a weak link. You should be able to return minus a restocking fee. 
 

With regards to evaluation methods, @dill has sound advice. I’m assuming you did not rush to judgement..

What happened when you swapped the two cords, placing the pre cord in the power amp and the power cord in the pre?

Take a break for a few hours, then listen for any changes.

It’s worth a try, right?

Another possibility is that the power supply of your amp is so well designed that it doesn't need the extra "help" provided by an expensive power cable.  Conversely, your preamp's supply may have benefited from a different power cable.