Those posts do not show a current date. Presumably, the graphs are presented as "proof" that highs are rolled off. Knowing nothing of the measurement methodology, I can't respond except to suggest that is it giving a false impression of what I know to be real and true: that Sensaphonics earphones are full-range by design and are not rolled off.
But my primary objection is to the false cause of the statement that was posted here -- that this (non-exeistent) rolloff was done "to protect hearing."
Sensaphonics has unequalled knowledge and expertise in hearing conservation, but that is not in any way a limiting factor as regards sound quality.
I have no intention of fighting 3rd-party battles with a Korean web forum, but don't want to see misinformation propagated here.
Understand, and I am feeling the same way. All deleted.