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

@roxy1927 The reason you can hear changes with power cords has to do with the AC line Voltage drop across the cord. More expensive cables tend to have less Voltage drop.

But how much this affects various bits of equipment is a different matter. Some equipment is sensitive to Voltage drop and other equipment is not. It also makes a difference how much power the equipment draws.

If your amp uses feedback (and the Pass Labs does) then its able to reject to a certain extent the effects of reduced AC line Voltage, despite a high power draw. So if the $500 cable wasn't a whole lot heavier than the stock power cord, you may have heard nothing at all until you reached a higher power level, which might be well above your normal listening habits.

As you may have surmised, not all power cords are the same.

bimmerlover

@mihorn Your comment “In my experience, a last 5ft power cord is much more important than in-wall wiring. Like a garden water hose, the nozzle only sees what it’s connected. The audio equipment draws the current from a power cord which is a bigger reservoir than in-wall wiring.” defies all logic and physics.

You seriously think that your “high-end” 5 foot long power cord is a “reservoir” for energy/electrons/electricity?

As I wrote, my words are from my experience. Please let me know what logic & physics I am against. May be I can explain.

In fact, having an only natural sound system in the world, I did many unusual things to my system that others don’t. Is it defying logic & physics? Alex/WTA

<knock, knock> 

"Who's there?"

"Reality"

"Reality who?"

"The reality that bit you in the butt when you got suckered into an expensive power cord"

The point is to improve the signal at any point in the chain before it reaches a component. So a better outlet and power cord makes perfect sense. This doesnt require much imagination. 

My opinion, if you bought a quality product, the manufacturer has engineers that designed the power supply for the amp and know the maximum power draw the large electrolytic capacitors draw and the power supply maximum current in order to meet the designed specifications. My Primaluna came with a large gauge conducter. (Large diameter cord) I am sure the cable is copper, not gold or silver. I am not going to be judgemental in saying you wasted your money. I think if the $500 cable makes no improvement as claimed by the manufacturer, then they should honor a refund if they are a legitimate company. I feel bad for your situation and hope you can get satisfaction from the place that sold it or the company that made it.