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<blockquote data-quote="ciaonzo" data-source="post: 7141663" data-attributes="member: 607015">I do realize that, I was being a tad facetious. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifI wasn&#039;t trying to force the requirement of both efficiency AND compliance targets tracking perfectly with each other, just one or the other for the sake of an example.My piece in all this was just to say that with all my experience with foam and rubber over the years, I&#039;ve learned my lesson. I take very good care of my things and they last me nearly forever. Of the two materials, only foam surrounds have been a point of failure WITHOUT abuse being a factor. Factor in abuse and there&#039;s no way foam would be my choice. Over-excursion is a fact of life sometimes, and a rubber surround will fare better if the suspension is the limiting factor in the design. Some drivers are motor-limited and some are suspension-limited, I realize that. I also realize guys like Jacob and yourself are very good at finding a nice balance when it comes to that, so mistakes or abuse would be the most likely cause for ripped foam. In my experience though, rubber survives what foam can&#039;t.I keep touching on thickness because I&#039;m of the opinion that the spider should be the main component of compliance and that the surround should affect it very little, essentially offering the least amount of resistance to movement while maintaining just enough thickness to resist cavitation and provide the required centering. The majority of foam surrounds force a higher resonance than I like, but in fairness I have come across a few rubber ones that do the same.</blockquote>

[QUOTE="ciaonzo, post: 7141663, member: 607015"] I do realize that, I was being a tad facetious. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] I wasn't trying to force the requirement of both efficiency AND compliance targets tracking perfectly with each other, just one or the other for the sake of an example. My piece in all this was just to say that with all my experience with foam and rubber over the years, I've learned my lesson. I take very good care of my things and they last me nearly forever. Of the two materials, only foam surrounds have been a point of failure WITHOUT abuse being a factor. Factor in abuse and there's no way foam would be my choice. Over-excursion is a fact of life sometimes, and a rubber surround will fare better if the suspension is the limiting factor in the design. Some drivers are motor-limited and some are suspension-limited, I realize that. I also realize guys like Jacob and yourself are very good at finding a nice balance when it comes to that, so mistakes or abuse would be the most likely cause for ripped foam. In my experience though, rubber survives what foam can't. I keep touching on thickness because I'm of the opinion that the spider should be the main component of compliance and that the surround should affect it very little, essentially offering the least amount of resistance to movement while maintaining just enough thickness to resist cavitation and provide the required centering. The majority of foam surrounds force a higher resonance than I like, but in fairness I have come across a few rubber ones that do the same. [/QUOTE]

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