Yep, had the same exact experience with expensive interconnects about twenty years ago. I had an SACD player with two sets of RCA outputs, so I could A/B them vs. some cheaper interconnects I'd been using for awhile (don't remember either brand at this point) by simply remotely switching inputs on my ARC Reference 1 preamp. I was completely convinced that the system sounded WAY better with the expensive interconnects. One day, I was doing the comparison and having the usual subjective preference, but then discovered that I'd mixed up which interconnect was on which preamp input. Needless to say, it was a moment of great self-enlightenment. We truly don't understand or appreciate how much processing goes on between our eardrums and what we think we're hearing, and how unreliable it can be. That's (one reason) why *I* use measurements as a sanity check. Everyone's mileage may vary, of course...