.....here's a little bit more for the rebuttal. This guy says all copper is equal, right? Here are some well known tidbits about the properties of copper that change with cryogenic treatments and real world changes as it comes to the end result as to what hits your ears.....and he says it's equal.....Pffft!
The benefits of cryogenically treated audio components can be heard while playing or listening to all kinds of music. For instance:
* Cryogenically treated cords and cables provide an extended dynamic range. In particular, high frequency range notes are much clearer and display less distortion at these highs. Measurements of cryo treated wires show that electrical and signal resistance is reduced after cryogenic treatment.
* Cryo treated amplifiers improve auditory saturation and lower the rate of distortion. Treated amplifiers offer improvements in harmonics as well as a much richer overdrive. Lastly, longevity should be increased as well.
* Single coil pickups that undergo cryogenic treatment yield an increase in output, and the tone will become smoother. The level of sustain also increases after cryogenic treatment. The change in overtones allows for a well rounded dynamic sound. Cryogenically treated pickups produce faster response time and feel.
* Cryogenic treatment of audio tubes facilitates a variety of gains in sonic performance. Users of cryogenically treated vacuum audio tubes report the following improvements:
o Expanded dynamic range
o A more refined and smoother high frequency range
o Increased bass articulation
o A deeper and more focused three dimensional soundstage
o Lowered dynamic noise floor
o Reduced micro phonics
o Less distortion in vocals
o Lower operating temperatures and an extended lifetime
The bottom line is that cryogenically treated components produce better sound than stock components.
That said, here's what changes to the physical properties...
Crystal structure (sometimes called grain structure) becomes consistent or homogenous through the conversion of austenite (one type of crystal) to the desired martensitic crystal (a different shaped crystal). The carbon structure of metals are modified through a mechanism that is technically described as "the precipitation of eta-carbides".
All metals - not just steel, but also aluminum, copper, cast alloys, etc. - benefit from the residual stress relief that deep cryogenic treatment promotes. There are theories to why this changes the sound and though it hasn't been proven, one theory is that it removes barriers to electron exchange in cryogenically treated coppers. Regardless of your stance on this, it's obvious that all copper is not alike.
Unlike what the "physicist" spews.
In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence.