3:20 Spot on sir! They all say: "vintage sound" but how these amp sounded brand new? Maybe they were harsh, picky, noisy also. No one knows. I get that glorification of the old but these old amps were new also :) I really enjoy the video so far!
One important variable that must be allowed for and compensated for: line voltages of approx 110VAC in 1959 versus modern wall voltages of 120-125 VAC today.