Here are comments and graphs on speaker distortion from a JBL 4367 review:
"Distortion measurements for speakers are typically done at a 90 dB reference point but the distortion numbers for the JBL 4367s were low enough that I also measured them at 100 dB to really see what these drivers could do. This is considered loud by any stretch and some lesser drivers would balk at these levels. This particular graph shows a distortion level at 10 kHz of only 0.389017% at 100 db"
"At 1 kHz the distortion level at 100 dB drops even further to 0.096540%!"
etc.
There is much more at: https://hometheaterhifi.com/reviews...g/jbl-4367-studio-monitor-loudspeaker-review/
Concerning distortion measurements: The article says:
"distortion measurements were taken at 1 foot distance from the appropriate driver."
Were these measurements (the SPL level) mathematically adjusted to 1 meter or 2 meters or the like? Can seem to find that information in the Home Theater piece or in your post. SPL levels drop rapidly with distance. As an example, the Sound Stage distortion measurements a few posts back, are referenced to 2 meters. Sound Stage labeled the axis on the graph. The author of the Home Theater piece did not.
In approximate terms:
100 dB at 1 ft.
94 dB at 2 ft.
88 dB at 4 ft.
2 meters is over 4 ft and less than 8 ft.
82 dB at 8 ft.
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