speaker driver material sound "timber"(+magnet types "timber" effect)

hi all 🙂
A little background...I come from a background of room acoustics and resonant acoustics, built electric guitars and pickups! + sound engineer and some experience in building active studio speakers

I would be very happy to hear from your experience on a subject that is very interesting to me and I probably don't understand it enough

In the question I am currently isolating all the other variables and referring only to the material from which the membrane is constructed(No need to explain to me that there are many other variables and it depends😅)

When I look at speakers from different companies and of course hear some of them, I feel that there are indeed features in terms of sound texture that are common to similar materials even when the speaker and the company are essentially different!( timber=tone color or tone quality )

for example:
Scanspeak Ellipticor (textile with extremely powerful neodymium magnet)
kef aluminum drivers
Accuton Ceramic Cone
Purifi proprietary fibre mix
tpcd
Diamond
Beryllium


In addition, the very combination with a different type of magnet affects the texture of the sound
good example is:
Satori TW29B-B Beryllium Dome Tweeter with[/B] Ferrite Magnet
vs
Satori TW29BN-B Beryllium Dome Tweeter Neodymium Magnet

Actually, what I'm trying to ask is how you look at the matter...when I try to design a speaker, my feeling is that the material from which the speaker drivers is built actually affects the basic nature! of the resulting sound, and therefore how do you combine different materials whose basic "nature" is different?
 
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