New power cord needed for speaker with powered subwoofer?

@geek , I guess the OP could ask the dealer or manufacturer if the cable supplied with the speakers are the proper gauge and rated for use with those speakers. Why in the world does anyone  think this company which has been building speakers with powered subs for years would provide power cables that aren't sufficient for proper use and potentialy hazardous? Has there been a lot cases of people getting shocked or their houses catch fire from Golden Ear speakers providing lousy cables? 

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 :)