And I have said it before and I will say it again.. I don't think there is a difference between one quality cable and another. If both cables have the same electrical properties and construction. I dont know what you don't understand about that. Again nothing personal but you just seem to be looking for an argument.
You completely missed the point of everything I've said in this thread.
To your question SCB. As Chris just replied while I was typing this. We don't need to do scientific testing, it's been done. The specifications published by the major cable manufacturers, Canare, Belden, Mogami, Gepco are available. The science is understood. A good cable for audio has certain electrical characteristics. These can and have been measured for what we consider "quality cables". Beyond those characteristics it gets into physical construction. At this point, experience comes in. Brand X cable fails more often. Brand Y cables have a shield that doesn't hold up when coiled repeatedly. Brand MONSTER cables have an RCA connector that when mated with a female connector stretch the contacts and makes the female connector unusable with other RCA cables.
So what we do is make a price/performance decision, and for most professionals that make a living using cables it comes down to the manufacturers I've listed using connectors built by Neutrik, Canare and Switchcraft. Cheaper cable will often do the job, but often the specs are not available, the build quality is lower, and they work until they don't. (which tends to be sooner)
Note: What Jon, Chris and I consider "Quality Cable" tends to cost 1-2 dollars US a foot, with the connectors in the 3-5 dollar range. Considering we are connecting microphones worth $500-$5000 to preamps and recorders that will run another $300 - $5000, going cheaper on cable just doesn't make sense, if for no other reason than we are capturing one-of-a kind performances where we don't get to ask the band to start again because we had to swap a bad cable.
That said, there is not a need to spend more on "Audiophool Super High Quality Cables" until we've seen specifications that show how these cables are superior on the things that matter. So far, there has not been an "Audiophool" grade cable that has been able to provide solid engineering data to back their claims.
Now I'm off to order 4000' of Belden Cable along with Neutrik and Canare crimpers for new HD switching systems we are building.