Are manufacturer AC cables good enough?

+1 Millercarbon. Every piece of wire matters as does every connector. This thread is like the 80's all over again.  

Holy molly Dow Jones! You are in every single thread on everything how does not matter. Nothing works for you? Nothing impacts the sound? What are you doing in audio forums then? Can you explain your participation in everything without contributing anything? I tell you what it is: Trolling!

I read this somewhere today. Definition of Trolling:

“practice of behaving in a deceptive, destructive, or disruptive manner in a social setting on the Internet with no apparent instrumental purpose.”

Read this Dow Jones. It applies to you! 

I've said this a few times on similar threads. The biggest single improvement that I've made to date, most bang for the buck, was an after-market power cord on my amp. Couldn't believe my ears.

It is possible some makers include a quality power cord with their
products? Nelson Pass has explained in past interviews that
he uses his own supplied cords. Now I do not believe he uses
Walmart interconnects. Was he was messing with the interviewer
or did I misunderstand his response. Has anyone else viewed this
same video?