New power cord needed for speaker with powered subwoofer?

It’s very tempting to dismiss the whole aftermarket cable business as hokum, and save a lot of money, but for the fact that I have heard with my own ears discernible differences that cables make.  Some either don’t hear the differences or consider them to be so small as to be insignificant.  Those differences, which are admittedly small, mean everything to some audiophiles, who may exaggerate them to the point that it makes no sense to the deniers.
The argument is really between apples and pears.  Each side is talking about different things.
 So, when someone tells me they have my speakers and aftermarket cables improved their sound, I tend to be on the side of:
”Vive la difference.”

@OP,
Like I said, give your ears a chance to hear the system. I do not doubt that changing cables will affect sound, but you need to know what you have before you will notice what you are changing.
B

Just giving something to think about rvpiano.  But as you already seem on the side of "it will make a difference" then, hey, it's your coin :)

@rvpiano Have you tried a statically sound testing procedure?.  You have to have someone not tell you which cable is used and play the same track/track section over an over again in the same room at same SPL level and collect data. And if you could discern the difference and stay at or above 3 standard deviation from a coin toss (the mean) that would be something. A large sample is important to get good result.