New power cord needed for speaker with powered subwoofer?

I had changed to a higher quality power cord in one of my source components and one of the first things I noticed was a change in the mid to upper bass range. Trying different cords made the sound range from muddy to much improved clarity. Especially in the upper bass range.

amg56"A fancy power cable isn't going to enhance what comes out of the wall. In fact it may amplify the bad stuff."

A power cord is a "passive" device and is unable and incapable of amplifying anything this is introductory, basic, and fundamental physics otherwise you would have perpetual motion! 

now that this discussion has cleared up the issue for you...just borrow a few cords, or buy some with return privileges and listen...some of my gear came with real good cords, others with junk, as if they knew no one would use the supplied cord...

Clearthink,

Do you believe peoples’ observatIons are ilusory?

Just asking.

Observations are biased inculding mine, yours, everyones.  Trying to filter out those biases to make a decision is the hard part.