Originally Posted by gchuva
PCOCC stands for pure copper Ohno continuous cast wire.
A. The OCC process for refining copper was developed and patented by Professor Ohno of the Chiba Institute of Technology in Japan and is licensed to our manufacturer for use in the production of wire and cable products for the audio/video industry. In conventional processing, hot molten copper is poured into a cooled mold for extrusion, resulting in multiple, fractionated crystal structure. While the copper may be "pure" in the sense of measuring gas impurities in the copper in comparison to standard copper refining techniques, Oxygen Free Copper (OFC) has undesirable effects that lead many to use more expensive materials such as silver for their conductive strands. As developed for A/V cable use, the OCC process utilizes a heated mold for casting and extruding, with cooling taking place in a separate process. The result is a larger crystal size and increased purity that approaches the 6N, 99.9998%! Looking at it another way, traditional copper has oxygen impurities of 200 to 500 parts per million (PPM), while traditional OFC copper reduces that to less than 10 PPM. With the OCC process, the figure is cut in half to less than 5 PPM of oxygen, and less than 0.25 PPM of hydrogen (compared to 0.5 PPM for OFC). With these results, the OCC process creates "ultra-pure" copper, and thus the acronym for the copper material is more properly known as "UP-OCC", for Ultra-Pure, Ohno Continuous Casting. Summarizing the benefits of the UP-OCC material used in our PCA cables you get the following:
• A true unidirectional copper crystal that is as free from impurities as possible to prevent corrosion
• Flexibility and fatigue resistance without impairing conductive characteristics
• Low electrical resistance
• Rapid signal transmission
Just about any person who is well informed about audio cables or wire will tell you that the above is the sheerest BS but perhaps not as bluntly. It is so easy to refute on a point by point basis that I won't bother to do unless asked to. It i IMO is a blight on the company publishing it. Their marketing department appears to be to have been taken over by space aliens! ;-)
The previous upchucking of this kind of balderdash about crystals in copper wire that I am aware of was called "Single Crystal OFHC wire" and dates back to the 1980s if memory serves. It was BS then and it is BS now.
Ask me again about this subject and I will tell you what I really believe! ;-)