Can upgraded power cords help my setup?

The most common problem that happens with house AC interfering with audio is DC offset. Yes, you can have DC offset in an AC line. It happens during peak consumption hours. Try this, does your system sound better at certain times of the day? Say early in the morning or late at night? A new power cord will not solve this issue, and compared to what's in your walls a common hospital grade cord is plenty for audio equipment. Like other's have said a PC does not in any way reject the type of "contamination" you would actually hear to get that "pure" power.  

Upgraded power cords helped every component I upgraded...some much more obvious than others, but all to at lease some degree.

I have Pangea power cords on my system and I am extremely happy. The AC-9 and the upgrades are for your power sources... amps, integrated, etc. The AC-14 and the upgrades are for your source components... turntable, network audio player, etc.

It's worth a try, you have a 30 day home trial to decide.

@dlcockrum 

I should've mentioned that I have tried cable "upgrades" in various forms, including power cables. I had my girlfriend swap them for me in an attempt to be objective. My conclusion was that if there is any difference, it's too insignificant to justify even a $50 outlay, let alone hundreds. I actually wanted to believe in cable magic, but even the old audiophile expectation bias didn't cause a perceived difference. 

The engineers I mentioned design and repair avionics systems for a living. EMI noise is a frequent problem in aircraft communication systems. When it comes to the wiring, other than grounding, shielding, and routing, nothing eliminates the problem.

Now if someone tells me a shielded cable can better reject EMI than a non-shielded cable, I'd agree, of course. If someone was using a cable of too small a gauge and switched to a larger gauge, I can buy into that as well. Maybe tjassoc can explain how a an aftermarket cable will outperform a shielded, well-made OEM cable. Other than EMI rejection, he is basically claiming that high-end power cables do something to filter noise that originated upstream of the outlet. Funny, I don't see any filtering components on 98% of aftermarket cables. 

It doesn't matter I suppose, no one here is going to concede to the other side. Enjoy wasting your cash on cables.

Hey guys, I apologize - never did I intend to insight the dispute that has ensued.
I won't be contributing to this discussion further.
I hope everyone enjoys their music - life is too short not enjoy music that moves our senses and stirs our souls.