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Message: <blockquote data-quote="squeak9798" data-source="post: 6132397" data-attributes="member: 555320">If you look at the above formulas, how does Cms not affect efficiency and sensitivity?  Using an excel spreadsheet, I can get sensitivity to bounce all over the place simply by adjusting Cms, which in turn alters Fs and Vas, which in turn alters No and thus SPL.Or, thinking about this with an extreme example......if I replace the spider of a driver with a dowel rod of the same mass that does not allow the cone to move, how does this not affect the efficiency as you would now have 0db sensitivity and an No of 0% ?  The only thing I changed was how compliant the suspension is......changing it from "X" to 0.......Asking seriously, as there is apparently something I'm not understanding here.</blockquote>

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