Audiophile Grade Wall Receptacle

Just get a standard one and save your $$$s.  It will make no difference to the sound.  Juice is juice.

And ask the hospitals why they spend money on upgrades - here in UK that's taxpayers' money.

In 70+ years of living I have never had a 'wall receptacle' fail in UK, although the design and construction in US and France leave something do be desired because of their 110 volt systems (France went to 220v a long time ago, but kept the same Mickey Mouse kit).

+100 on the Oyaide R1

It is the top of the range Oyaide.

Top Furutech is nearly double the price and Quantum Science Audio sells $6.5k sockets.

I will tell you the $50, or $100 Pangea receptacles are all Copper ,and  Gold plated 

much heavier built then most even at much more monies and they grip the connectors very good , That be said  , fits Equally important to have similar quality 

pieces, and make connectors ,for many lesser cables use Brass ,not that great a conductor just loook under metals conductivity chart, Silver if roughly a 67, Copper a 64, Brass maybe a   24.  You can spend $300 if you want ,also in your line conditioners many use cheaper Hubble receptacles ,fine for industrial but not Audiophile this creates a resistive Bottleneck Copper+ rhodium ,or Gold , ,look on your interconnects, and speaker cables as well , what’s the point of all quality wire then cheap connectors at the end, it’s like putting cheap tires on a Ferrari.

I tried a few different outlets in my old PS Audio P600 and then tried them in the wall as well.  My P600 came with the orange hospital grade outlets.  Originally, I bought an Oyaide SWO-GX and an R1.  The gold plated GX was marginally better than the stock outlet but too warm and syrupy for my taste.  The R1, however, was a huge improvement over the stock outlet and the GX offering much more detail top to bottom with greater air/extension above, much better dimensionality, and both a more authoritative bass range and greater dynamics and control.  I thought the R1 would be my final outlet choice but I tried both the Porter Ports and the Cruze Audio Maestro and these revealed to me the single shortcoming of the R1, that is a slight loss of transparency.  Either of these outlets made the R1 sound a bit veiled.  I can see how this might not even be noticed in many systems but it's there, if you listen for it.  I sold both Oyaide outlets and bought another Porter and Cruze Maestro outlets.  I think the Porter might be ever-so-slightly more transparent but the Maestro has the control of the R1 while the Porter seems to lack a bit of control, at least compared to the R1 and the Maestro.  The Furutechs may be better but I've never been tempted to experiment further with outlets as the Porters and Cruze's sound excellent in my system and switching around outlets is a PITA.

And don't listen to the naysayers here.  An opinion doesn't mean much without direct experience.  

Oyaide R1 is very nice. I tried a number of receptacles with my power conditioner and wall outlets, combo of R1's and PorterPorts is what I ended up with.