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<blockquote data-quote="squeak9798" data-source="post: 1101411" data-attributes="member: 555320">Xmax = One way linear excursion capabilities.Couple of different ways to measure Xmax.&nbsp; One is measure the difference between the length of the coil &amp;amp; the gap and divide that number by 2 (pretty inaccurate method).&nbsp; Another is to consider it to be the lesser of Xmag and Xsus (fairly accurate method).&nbsp; There&#039;s more...but those are the two most &quot;common&quot;.&nbsp; Just realize that not all Xmax figures are comparable.&nbsp; Sometimes it&#039;s like comparing apples to oranges.&nbsp; Depends on the method used.Xmag = As hoss said; Linear excursion allowed by the magnetic limitations of the motor.&nbsp; Generally considered to be the point at which Bl had dropped to 70% of it&#039;s rest value.Xsus = Linear excursion allowed by the suspension of the driver.&nbsp; Generally considered to be when the compliance of the suspension has decreased to 25% of it&#039;s rest valueXmech = How far the sub can excurt (non-linearly) until mechanical damage occurs.&nbsp; Basically; if you meet Xmech, you&#039;ll have a damaged woofer on your hands //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gifPlease make note of the use of the term linear above.&nbsp; That word isn&#039;t just thrown in there for fun.&nbsp; It&#039;s a vital part of the definitions.</blockquote>

[QUOTE="squeak9798, post: 1101411, member: 555320"] Xmax = One way [B]linear[/B] excursion capabilities. Couple of different ways to measure Xmax. One is measure the difference between the length of the coil & the gap and divide that number by 2 (pretty inaccurate method). Another is to consider it to be the lesser of Xmag and Xsus (fairly accurate method). There's more...but those are the two most "common". Just realize that not all Xmax figures are comparable. Sometimes it's like comparing apples to oranges. Depends on the method used. Xmag = As hoss said; [B]Linear[/B] excursion allowed by the magnetic limitations of the motor. Generally considered to be the point at which Bl had dropped to 70% of it's rest value. Xsus = [B]Linear[/B] excursion allowed by the suspension of the driver. Generally considered to be when the compliance of the suspension has decreased to 25% of it's rest value Xmech = How far the sub can excurt (non-linearly) until mechanical damage occurs. Basically; if you meet Xmech, you'll have a damaged woofer on your hands [IMG]//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif[/IMG] Please make note of the use of the term [B]linear[/B] above. That word isn't just thrown in there for fun. It's a vital part of the definitions. [/QUOTE]

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