Can a power cord increase the resolution of an Class D (SMPS) amp by more than 5% ?

When we sit listening to our stereos, we can’t literally see photons or electricity, but we can hear differences. 

But, to the OP, I have a Triode Wire Labs “Digital American” power cable on order to arrive this week. It is designed specifically for class D sources, amps. Supposedly helps to reduce brightness of Class D and help sound more organic. 

Will see. Check it out on their website. $500. 30 day return policy. 

If its expensive then you will trick your mind into thinking there is a difference!😆

There is no such thing as "directional" alternating current - period.  Mr. Tesla proved that 100 years ago.  

KW6 - I think it's the other way around - "it's expensive in order to trick your mind into thinking there's a difference".  A fool and his money....

To the OP
i am now trying a Triode Wire Labs (TWLs) Digital American power cord.

It is designed specifically for Class D powered devices, from DAC to Amp. it runs $500, and YES, I can hear more than %5 difference.

I am running a Class D Bel Canto DAC 3.7 directly into a Class D Bel Canto Ref500S amp (ICE modules). The cable was burned in at TWLs, and I have been listening 20 hours or so.
. I plugged the TWLs cable into the Ref500s amp and here is what I found:

. Compared to the PS Audio AC 10 and a Nordost Blue Heaven power cord that I have, the TWLs did reduce some digital edge/gain off the top end, which was an improvement.
. Also, the bass is a little deeper and cleaner, whereas before with the other cables, there was more energy put into the mid-bass, causing a mild and soft mid-bass bump that I don’t want (even on a pair of Dynaudio Countor S3.4 floorstanders).

How do I know it is a 5% difference? The sound change was obvious and significant, and this is on a relatively “high end” system that already sounds quit good. IOWs, given the cost of my current system and approaching the point of diminishing returns, I still feel this is a significant improvement.

For those interested, TWL has dedicated Forum threads on AudioCircle, they are a newer smaller American Co. (AND made in America), offer a 30 day full Refund. They regularly integrate with systems at Audio shows with Border Patrol, Vinnie Rossi, Volti, and others.

I have no affiliation with TWL, I just like it as a small American Co that makes boutique, quality products. He makes them by hand one at a time, not a big factory and “faceless” corporate operation.