Audiophile AC Outlets

I have used first PS Audio wall receptacles first and then Furutech GTX D NCF to feed my entire 2 channel stereo system. Everytime I upgraded my wall receptacles I experienced a big improvement in the sonic performance of my entire system. Furutech was much more expensive than the PS Audio unit but it took my entire system performance to a different tier all together. I felt like I am having a virtual power conditioner in my system with the Furutech units. Improvements came throughout the entire frequency domain.
However what possibly helped this upgrade is another foundation work in the AC power domain. I had installed two dedicated 10 guage circuits before replacing the wall receptacles. With these two changes I don't feel any compelling reason to look for a power conditioner in my system.
Thanks. 

A friend and myself did a shootout plugging my amp into 
a double ( ! ) cryro'd hospital grade , 
a lower grade Pangea ,
a P.S. Audio PPC 
and an Audioquest NRG Edison which was the winner .
We to our ears we defiantly heard differences . 
So depending on your budget , I sure that there are others that would equal and maybe surpass the Audioquest but at least you have information from multiple forum responders to try an outlet upgrade .
Good Luck

I installed a Cardas outlet after replacing my older Power Wedge with a Shunyata Venom Power Strip. Could here the difference immediately. My system sounded more transparent.

I installed an Oyaide R1 about 15-18 yrs ago and haven't looked back. Tried an Arrow Hart before that. It was an improvement over the cheap outlets I had previous. But the R1 was a big improvement.