Interesting topic. Not sure if it has been informative enough for me from a practical sense. Was surprised to find no one mentioned the effects of adaptation on human hearing in A/B comparisons such as this. How long does one have to listen for the differences between cable change ups to stick in memory and not be affected by the adaptive nature of human hearing after the time it takes during the swap. This effect happened to me today trying out a multiband compressor to juice up some flat CD music (listening on headphones) and my better judgement established from previous experiments that told me this was a worthless tool reminded me how adaptation twiddling knobs making me think this tool is the best thing since sliced bread only made me realize as before that I needed to walk away from my DAW and come back to hear what I thought sounded SPECTACULAR to now sound like garbage. And that's because my ears adapted to the multiband compressor's effect at FIRST LISTEN. After some time twiddling knobs and sliders I thought it sounded the best it could only to come back after my ears adjusted to the silence to realize again I wasted my time. Has anyone here including the OP tested for this adaptive effect and if so how do you know that isn't what's changing your perception?