Should I update my manufactures power cords?

Send the unit to me and I will upgrade the power supply caps, resistors, etc. which will bow any power cord you an buy away.

@bigkidz What would something like that cost?  I assume doing this would void the warranty?

Morning dose of entertainment - nothing beats audiogon. 
We have a multi thousand dollar isolation device that will make more difference than power delivery and we have a McIntosh amps aren’t good enough and I can make them better with a cap upgrade recommendation. 
 

The peanut gallery has spoken. 

Back when I was avid in the Mcintosh forum at Audiokarma there was a fellow who sent out his newish (501’s I think? off the top of my head...) amps off to someone who did this procedure. I actually copied and pasted 2 of his comments over a 6 month period back to him in one of the threads. The first post was a few weeks after he received his amps back from getting "upgraded": "I would definitely do this again" and the next was what he stated about 6 months later when someone asked him about the "upgrade":  "I don’t think I would do this again" .

Yeah when the honeymoon is over you realize you f-ed up and you actually don’t like the change, will never recoup your investment and no one wants your amps because it’s impossible to tell what they sound like compared to original and the warranty is void. I had done this way back when on an amp I really liked in its stock form and learned my lesson.

Aaudiphine1 - I guess your post is directed at my comment regarding upgrading a component?  If so, I invite you and any one to come by our listening room in New Jersey and spend some listening time.  We can show anyone what the difference are.  Been doing this for over twenty years and BTW we also have our own line of components for you to drool over.

Happy Listening.