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Message: <blockquote data-quote="Fi Car Audio" data-source="post: 7375829" data-attributes="member: 569083">As mentioned above, 1 way.Deriving/measuring Xmax comes from two values, mechanical and magnetic.  You take the smaller of the two as the Xmax (as the smaller is the limiting linear factor of the sub).  Most subs have more linear mechanical throw than motor/coil linearity.  So usually the coil and motor geometry are the linear limiting factors.</blockquote>

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