@mijostyn
Good information. My data came from a "good source" 30+ years ago, Lots of charts and graphs and beautiful illustrations. I was unmarried at the time and didn't have to "sell" someone on the concept of putting hand-built, 6'-4" tall, Alpine white (line source) speakers in the Living Room. Now my wife just accepts them as part of me being me.
Thanks for the technlogy refresh. Good to know I'm still trainable.