> there's no way you're going to get away with disguising one cable as another...

You help make my case, that regardless of any what a DBT could theoretically prove, the practical reality is that there is probably no implementation possible that would 1) either be truly double-blind, or 2) not give an excuse or "out" to discount the results.

Of course, many people also are confused about what a DBT is. They think it must have some type of rapid switching mechanism to pop back and forth between two components. What double-blind really means is that the test subject does not know which product is currently under test and that the immediate test administrator also does not know. The latter is necessary to prevent subtle hints (whether intentional or subconscious) to the test subject. A screen in a listening room - especially for a long period - fails to provide any real confidence that blindness would be maintained at the needed level.

As such, I simply don't think it is possible to design a DBT for a certain segment of the audiophile community. Far too much terminal uniqueness in our psyches.