Not sure if you have seen this or if is has been posted here before. This backups my feelings on audio ABX tests.
Most of you will fail this visual ABX test despite knowing for a fact that there is a difference between the items they are showing you. If you can't pass an ABX test in which there is a guaranteed measurable and visual difference in images, they how can an audio ABX be valid?
And before you bring up the fact that there might not being a measurable (or significantly measurable) difference in amps, cables, dacs, or whatever. Measurements don't tell the whole story. Is soundstage/headstage measurable? No, but we can all agree AKG's have massive soundstage compared to Grados. How can that be when it's not measurable? <rhetorical, don't attempt to answer>