El,
I did make some measurements at lower SPL's and although I didn't make note the specifics, you are correct. Voltages go proportionately lower, by a bunch.
Also understand your point about rms vs. peak, and yes, that was a misstatement on my part.
The voltage differences between the 2 panels caught me off guard. I hadnt reasoned through it properly
i.e panel size, higher magnitude of excursion at the lower frequencies, etc.
93-95db
that is reading the bar graph on the RS meter. Lord knows what the real peaks are. Only ½ dozen or so songs that I can actually listen to that loud. It is overloading the large, sparsely treated room on 99.9% of music, and probably straining the amps on all music. But someone with an extensively treated, large room
I can see them pushing amplifiers to those kinds of voltages to get 90-91db peaks at the listening position and being quite comfortable at those volumes.
I know most here will yawn, but going through the reasoning and measurements the first time (like me) is fascinating and educational.
Best Regards,
Jim S.