Audiophile Grade Wall Receptacle

@mitch2 

Yes you are correct it is a huge difference in resolution, frequency extremes, detail. And you are right as big as an equipment upgrade. Myself I bought my first one because it was on a good sale and it was a jaw dropping change I then order enough others to change out the rest of my plugs in my main system. It is hard for people to do is spend that kind of money on a receptacle and in my opinion that is why people doubt it. It seems like a crazy amount but once a person has tried it no going back. For all that have doubts just try one and in fact if you don't like it I am sure you can get over half your money back reselling it. When you take that into consideration the cost of trying one and not liking it is about the cost for two people going to a restaurant and having dinner. When thought about in that way it is easier to spend the money. I highly doubt many people will sell except if they try another brand and keep the one they like best.

Yes you are right it is a major improvement just hard to believe that it can be that much better. I am a firm believer in them and hope that all audiofiles that are on the fence just go try one. 

None of those high end models are any better.  I tried everything.  Your only goal is a high clamping force.  Get some Hubbell hospital grade outlets for $16.  Nothing sounds better, and they may be worse.  Tellurium alloys are junk.  Get a conduction chart for copper alloys and you will be shocked.  Stick with as pure a copper alloy as you can get. Then you can afford to put more everywhere. 

Well I think you are correct about the pure copper part.

I second what @sandthemall said. "Hospital grade" receptacles are built to higher mechanical - not electrical - characteristics. They are designed not to fail from heavy usage, not to break or to release a plug if it is yanked inadvertently.

https://www.leviton.com/en/products/industry-solutions/health-care/hospital-grade?gclid=Cj0KCQjw0umSBhDrARIsAH7FCofcF2_UrgX86_JKGLz4PxRhoW0QstIQsh7sibWAKCTEzsvHGTDjn6IaAj9KEALw_wcB

Hospital grade receptacles are not allowed to have isolated grounds in patient care spaces. https://www.electricallicenserenewal.com/Electrical-Continuing-Education-Courses/NEC-Content.php?sectionID=353.0

Hospital receptacles power equipment that is typically far more sensitive and expensive than a stereo set up, equipment which, should it fail or falter, could have life-threatening consequences.

Spending hundreds or thousands of dollars on an outlet, beyond one that has good solid connections and has sufficient amperage rating, will not provide any improvement, electrical, audible or otherwise. An exception might be for an isolated ground, if that is indeed a problem in your space, i.e., you’re having trouble with ground loops.

How many are you replacing? If you are talking about the whole house, almost any good 20 amp Pass/Seymour, Hubbell, etc. with a nylon body will be a large improvement over those bags full of duplex outlets for ten-twenty bucks used by most builders. The difference? Friends, I know who bought homes new here, after 12-18 months the receptacles would start to sag when you plug into them. My parent's home, an old English Tudor, clay tile roof, copper gutters, still have these ancient looking brown Hubbell outlets in the basement from the ’50s, early 60s, and to my amazement, there is tight as anything made today.