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Message: <blockquote data-quote="Agaton Sax" data-source="post: 1107232" data-attributes="member: 2475">Where once my brain was, is now just a cavity and that hole seems rather cloudy but I do seem to remember there were 2 types of tweeter diaphragms. One was slightly heavier and went lower but didn't reach as high as the other which was lighter but couldn't be used as low. I think 2402 went lower and 2404/05 higher but I may be wrong. As most JBLs were abused it is likely that the dias were replaced at least once. One pair of my 2404 had 2402 dias and could be used lower.Probably not important but you don't want a pair with dissimilar diaphragms. On the other hand, maybe I remember it all wrong?</blockquote>