Rsbeck: If the cables measure the same, they'll sound the same. If they sound different, and you are honest about hearing a difference, then there must be some way to quantify what you hear. It is that simple and my method keeps it simple.
Your method introduces other variables such as some type of a switchbox and additional cabling necessary to perform such a task into the equation. Not only can this taint the results due to "contaminating" the circuit, it alters the impedance and current distribution along the signal path. Since cabling does introduce distributed electrical characteristics along the conducting path, adding a switchbox and a different type of cable before the switchbox into the listening path DEFINITELY changes what one would measure and potentially hear without such variables into the signal path. That's because the switchbox and connecting cable will all introduce their unique impedances and multiple additional connections into the equation whereas they wouldn't be there normally. All of this is verifiable and measurable IF you have the right equipment( Time Domain Reflectometer ). Obviously, the people believing that an ABX box introduces no variables into such a situation are lacking the proper test equipment and knowledge to verify such things and / or have been lying to the general public on purpose about such things.
Swapping cables manually at the amp one at a time definitely keeps the path "purer" for such a comparison with the only variable being one's own listening skills, auditory memory and level of integrity. As mentioned above, i'm willing to trust your listening skills and integrity under the conditions that YOU choose to make when conducting such a test using equipment that you are very familiar with in a room that you are very familiar with using a recording that you are familiar with. Sean
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