hospital grade or commercial grade receptacles ?

Albert....I myself have been transfixed by your presence at various audio shows. It's gotta be the cryo.

Albertporter...The notion that a degree in physics inhibits thought takes the cake.

Irvrobinson,
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Simply put - cryoing does make a difference and that difference varies depending on the item involved (cables, CD's interconnects, Power Cords, etc.).
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I have done double blind A/B studies (repeated over a two week period) that absolutely proves to me that cryoing works and it is a significant improvement.
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It matters not that you can't measure it with a meter. It matters that two people can hear and appreciate the difference during double blinded studies.
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Albert - Hello to you - keep on cyoing outlets and selling them to grateful audiogoners - you are a pleasure to have amongst us.
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The issue in this thread is that some people have been asserting that there are differences between power cords and outlets because they claim to hear them. And there are other people, like Iverobinson, that are assume the differences they hear are due to their imagination because there cannot be any. So it does come down to dueling assertions. I believe mine has much more standing because 1. the placebo effect has limited applicability, and 2. 120v/60Hz electrical signal measures, even were they taken, fail to capture all that is happening along ac wires. They would rather believe their limited understanding of science than their own ears and live with the ever present fear that they may be taken in by a con.

Hdm - I have not measured any cryo'd cable. For one thing, I'm not sure how I would measure the difference, unless the improvement was on the order of 50%!!

A run-of-the-mill 14AWG Cu cable has resistance of .0026 ohms per foot. So, a ten foot power cable would have about .03 ohms of resistance. The resolution of my test equipment is about .001 ohms, so the improvement from cryogenics would have to be big for me to see it. I don't use 14AWG cords, I use 12AWG cords, which are about .0017 ohms per foot, so, if I may ask, how are *you* measuring the difference? On what? In my opinion, a .001 ohm difference in a power cord is worth essentially nothing. Every outlet and plug I have measured, only to test for proper function, measure zero ohms (in other words, beyond my multimeter resolution).

Cryo treatments *do* change metallic structures. It's popular for good reason with brake rotors, for example. But it doesn't materially improve cables.