Headphones

It's not actually. Same methodology and it was clear to me a DDC I bought had zero impact whatsoever. My interest is in the cheaper option being better so I can return the more expensive. It's really not difficult if one focuses on very specific sounds and how detailed they are and where the placement is. When something is prominent on one DAC and you literally can't even hear it on another, then switch back and there it is again. When something is easily repeatble and obvious like that it's not actually a placebo effect is any more than having a piece of paper with 4 dots that you switch out for one with 5 dots. If you go back and forth and see always 4 on one and always 5 on the other a placebo effect is not the reason.