An excellent video. Harley does a great job discussing the place of measurements in recording, design, and playback. I am a trained scientist and worked as a electro / mechanical design engineer. I quickly realized principles and specs would get you in the ball park… but quickly needed to be abandoned and experiment with materials to get the preferred outcome. Just like I have heard high end audio designers say… these resisters sound like this, these capacitors sound warmer…etc… and they go on to craft a natural realistic sound and leave the specs take care of themselves. I guess, that was one of the first lessons I learned after buying some amp with incredible peak watts per channel and sounded terrible. A real basic principle of high audio… glance at the specs…. Then listen, listen, listen.