Cryongenically treated in-wall AC power wire

There have been some credible reports over the years from people saying they don’t like the sound of cryo. On the other hand, a great many more have reported they DO like the sound of cryo. So, it’s not like the issue is split 50/50%. Thus, it’s probably best to describe cryo as another one of those he said she said type situations. Michael Green is very experienced so his testimony can’t be easily discounted. There are some technical arguments why both heat AND cryo solutions might work, sound wise. Certainly the cryo process can temporarily make things sound bad/funky (i.e., thermal shock) so that in itself might explain some of the negative reports. But maybe not all.

It would be a Big Shame if cryo does turn out to be bad for the sound, makes the soundstage disappear or whatever, which I doubt, since so many cable manufacturers have been turning out cryo’s cables for years, not to mention high end electronics companies like Meitner have been routinely employing cryo for years. So, obviously there will be a whole lot of very Unhappy Campers 😢 out there if this cryo thing turns out to be hoax, which I doubt it will. I wouldn’t bet the ranch however.

I believe cryogenically treating various audio items firstly has a very long break-in time.
Secondly, depending on the material being cryoed, it could work in a positive or negative manner.
Thirdly, it's a matter of personal preferences and taste.
As in life, there isn't always one answer that's always correct for everyone, especially when it comes to audio, individuals components room acoustics, etc.
Here is a good example, I had a gold AC duplex outlet (Firm) cryogenically treated, after a very long break-in process I did not care for the sound of it compared to the exact same gold outlet that was not cryoed in a side by side evaluation. I remember this caused quite a controversy in a discussion on an Audiogon thread many years ago.
If 10/2 cryoed AC wire sounds best in ones system then they made a good purchase, if one can't hear the difference (as in my case) they made a bad purchase (as was in my case), but one never knows until they try it for them selves.

The audiophile hobby takes big swings from one end of the scale to the other with time always being the test. What I have tried to do, faithfully I hope, is every few years I will setup a listening shop I call TuneLand, or some may remember TuneVilla, where listeners can come and explore different interest of theirs. The doors are pretty much open for folks who want to be serious about coming to conclusions on their own. A couple of rooms are available for the listener to dig in and do anything they want, without me peeking over their shoulder. This last space of time and place covered Cryo pretty extensively. I did this before but was convinced it was time to revisit. There were also some low mass adventures that were fairly overwhelming, but that is covered on my forum. As listeners played with adjusting their cables and other items there was not one who chose Cryo over heat and vibra-tuning. At the same time we did our local testing the same testing was done in several countries, so we could get different opinions from different listeners. There was a difference in other topics but I was surprised that not one person took Cryo over Temp-A-curing. The long term deciding factor came down to missing information in the recordings. And the other conclusion was when people moved their Cryo treated cables from one listening environment, letting it settle for a month or two, then moved the cable to another location, or shipped to another country, the cable never recovered from the first setup. I had several thousand dollar cables loose their performance cues altogether. This happened with such regularity I started to wonder what people did when they moved into a new home and found the music all messed up. What did they blame the bad sound on? The pre broken in Cryo treated cable is a good place to start with. It would be good to hear from others who have experienced this same issue.

vtech2000

A separate electrical meter and utility line feeding it from the street, running to its own breaker box and the dedicated wiring fed from there. Full isolation from the electrical system powering the rest of the house.

Local zoning will often prohibit such an arrangement, because it could allow a multi-family home (or home with a separate business) in what might be a neighborhood limited by zoning to single-family homes. In any event - even where it would be permitted - the grounding system would almost certainly need to be common between the two systems in order to comply with NEC.

Again, the solution to the perceived problem of "noisy grounds" on an audio system is not to pursue multiple grounds, but to ensure that all the grounds are clean. And the neutrals. And the hot connections. Noise can be introduced anywhere in an electric system, not just the ground.

The link that almarg previously provided is an authoritative resource that slays many grounding myths. Here’s one of them:

" Its connection to earth is not what makes ’safety ground’ safe ... its the connection to neutral. "

That’s worth pondering as you consider that NEC requires neutral and ground to be bonded together at the service panel.