@russ69 +1, Nudell on trickle down tech:
I was very lucky. As a young audiophile, I visited every stereo shop in SoCal listening for the shop that had the best sound. I found it at Woodland Stereo, the shop that helped Arnie develop the Servo Static and other loudspeakers. I got to listen to the products and hear about the problems. By far the best sound in SoCal. I didn’t need a DBT to hear the difference, they were head and shoulders above the rest. Arnie had the education (Physics) and the ear to make extraordinary sounding loudspeakers. And I got a glimpse of it all as the products were tested and improved at the shop that I bought my gear from.