The design is as follows. The system uses logic controlled high speed switches (Maxim 303CPE) controlled by a random number generator circuit that basically selects either test cable at random intervals. There is NO operator or user control to INITIATE the test transfer, but only a button that operates a tally counter dedicated to each cable with a Y/N indicator the listener cannot see.
The switching sequence momentarily parallels BOTH cables (1-3 seconds) then drops off one or the other. That way there is no sudden glitch in the audio as one path is made and the other broken. The switching of the IC is less than 10 ns, but we drastically lengthen that for this test.
The listener has a 2 button controller. He pushes one button or the other that tallies whether he thinks a cable is a high dollar or the stock. The tally system tracks the correct/incorrect choices.
There are NO active or passive analog or linear components in the signal path, ONLY the IC switch and the gold flashed RCA jacks and the cable length between the I/O jacks and the switch is a total of about 3 inches.
The power supply is a switching style and is external to the device and has a ferrite sleeve on the DC input. The listener remote tally controls are even opto-isolated.
I think I have about covered any realistic concerns about accuracy and coloration from the test system.
I detailed all this on the other forum and after the cable hawker read it, he immediately declined the test and has not been heard from since.
Wonder why?