I watched that last time you posted it, Bill. The speakers are articulate and well informed, but talking about music and music reproduction isn't the same as listening to music. Rational argument only gets us so far. I'm not advocating for magic or weirdness, but valves/tubes do have something to offer (imho, of course) for stereo/hi-fi use that other devices don't seem to have. I have heard some astonishing systems in my time. They weren't perfect and some even had flaws - a set of single ended, low powered vale amps, driving horn loaded speakers that I heard once, for example, had a noticeable midrange honk, BUT I have never heard the human voice reproduced quite as well or convincingly. Perhaps it's due to the fact that we cannot measure everything that is important to music reproduction (and probably that we don't know what it all is, yet - human knowledge is still pitifully limited, after all). And of course, you don't drive valves into distortion for stereo type of listening. You need to use a powerful enough amplifier (think 300Bs, rather than EL84s) to avoid that.