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

I’m shocked. Shocked, I tell ya.

Looks like you got the ’snake oil answer’ whether you wanted it or not.

Going back to your first power cable upgrade on that amp (which I assume was the $500 cable you referenced), did you discern a difference?

And is the newly upgraded power cable you are auditioning on the power amp the same power cable you have on the preamp? If not, it would be interesting to find out what you hear if you put that new upgraded power cable on the preamp, instead of the amp.

I don’t think your thread will be deleted if you mention the well reviewed power cord. 
I assume the amp is Pass X250.8?

So what is the power cord that made no difference after several weeks?

FYI…I’m running Audience Forte f3 power cords on my X260.8 mono amps and even though they’re not expensive at all (nowhere near $500), I heard the improvement over stock cords. 

 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?

. . . and am I misunderstanding you? It reads to me as if you once replaced the OEM cord with a $500 cord and then recently replaced the $500 cord with one costing way more than that?  Or have I got that wrong, and the upgrade that you just made that you are hearing no difference with is the $500 cord?

"the amp’s manufacturer said don’t bother. "

If anyone should know, it's the manufacturer?

an amp I bought 2 years ago came with an expensive power cord (as a gift - the seller was getting rid of everything). I hear no difference whatsoever between it and regular power cords. I assume it depends on the components, if my amp and speakers were in the same class as the cord, I might hear the difference.