I've done a handfull of blind tests on front-end components with audiophile friends since I started in this hobby back in 85'. The results are not always as expected, but never leave anyone with a shadow of doubt there is a difference in front end components (or any other for that matter). I've always found results to be fairly consistent in terms of descriptions of qualities, but not as consistent in the preferences for individual qualities and components. It can be fun to do. Changes certainly are incremental, and whether they're worth the $ is entirely up to the individual. Synergy can be so easily demonstrated that questioning that just tells me you haven't tried many different combinations, or if you have, you must be hard of hearing. What gets me is the overzealous statements people use to describe the differences as if to justify their superior taste and savvy investment. Get over it! One of the things I've found in doing the A/B/A blind comparison sessions, is that it can be fun on a social level, but it is NOT about enjoying music in the moment, and in fact it tends to take you away from enjoying the music, at least it has for me. I agree, there is no shortage on commentary, but I'd doubt much of it qualifies as being "authorative". I've said it before, it's all subjective. If you can't hear a difference, and or, don't give a rat's derrier, all the power to you...you'll have more time on your hands to enjoy the music!
Marco
Marco