| Aah, I knew someone would ask this, and it's a good question. The answer's pretty simple though, I recorded a consistent acoustic source with my interface powered with the standard AC cable, and then with the Requisite cable(s) (plural since we were comparing various prototypes) and several other brands, and then lined up the various recordings in PT and compared them. The mic & line level cables were tested in much the same way.
Comparing the AC cable on my mixer was not hard, as switching AC cables on that only takes a few seconds, and it's easy to hear the difference when listening to music with only a few seconds between hearings. Especially since the difference is not at all subtle. |