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Speaker cone material pro's and con's

Are any of you aware of well-written general discussions of the pro's and cons of various speaker cone materials, for example, paper cone, metal cone (and various metals), polypropylene, ceramic, Mylar, etc.? I am not interested in propaganda for various technologies found on speaker manufacturer websites or opinions offered by audiophiles based upon something they read in an audio magazine, but rather, seek a good, general discussion that is written by a person qualified to speak to such issues (e.g., an engineer or physicist) and that is accessible to a reasonably technology-savvy layman.

I understand that the implementation of a particular cone material is crucial to performance and that it is thus difficult to discuss materials in a vacuum (e.g., how a cone's vibrational mode is dealt with dramatically affects performance), but a good discussion would presumably assume certain standard implementations and still arrive at conclusions.

Any links or recommended readings? Again, I am not looking for audio forum blather derived, for example, from someone's trip to Wilson or (mis)understanding of something written in TAS, but the serious observations of qualified authors.

Thanks in advance.
dearing

Showing 2 responses by mechans

mechans
3,048 posts
 
Why are concerned with the material used when it is the If its the sonics you are interested in then a discussion hghly scientific of course of the tensile strength of kevlar of a particular type versusthat of paper is meaningless. The entire driver parameters may be what you want that tells you more objectiveinformation.
Technical talk of one material over another is blather with very cone/dome/oval, square, specific data. You might want to know the Qts. for instance, this could be high or low do you know what you want? Because there are advocates for both types depnding on the cabinet design. etc. There is paper that is like leaden cardboord and there is paper which is siff and very light. What question are you interested in answering? Look at the raw driver sites they frequently give specs. You didn't include the Plasma Flame tweeter transducers in your post. But that's a hot topic.
mechans
3,048 posts
 
Let me apologize for the rushed post. That first sentence makes no sense to me either. My point is you can make general staement in isolation about the material used. For instance so many mill of a known alloy of aluminum will weigh a certain amount and be stiffer than many doped papers. The question is what parameters are vital. Do you think calling our non phyical engineers or non compound chemist's contributions blather? Speakers are tricky to get right. The materials used make a contribution but in the end it is the sum of the parts. Good speakers obey the fundamental rules and then the builder, who is on a path of good intentions hears them and spends a lot of time voicing them. It is an imprecise science.
In order to give this fellow a reference that is truly helpful you have to ask what does he ultimately want to know. The early speaker design books tell you more about what the resultant sonics are likely to be. I personally don't think dustings of diamond on a cone or Be or Ti fundamental.
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