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post #1 of 8 Old 06-29-2013, 04:50 PM - Thread Starter
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What is Xmas and what is excursion?

Iknow it has something to do with the travel of the woofer.

Does more or less excursion or Xmas make a sub better if its the same in every other area?

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post #2 of 8 Old 06-29-2013, 04:57 PM
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xmas is short for christmas which falls on december 25th every year. smile.gif

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post #3 of 8 Old 06-29-2013, 05:08 PM - Thread Starter
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Well ima a Jehovah's whiteness....

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post #4 of 8 Old 06-29-2013, 05:12 PM
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that explains it....however the term is xmax which is how far the driver can extend/travel without bottoming out.
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post #5 of 8 Old 06-29-2013, 05:13 PM
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Quote:
Originally Posted by newc33 View Post

Well ima a Jehovah's whiteness....

You stay white here, Ill be black later. wink.gif


http://www.subwoofer-builder.com/xmax.htm
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post #6 of 8 Old 06-29-2013, 05:17 PM - Thread Starter
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Quote:
Originally Posted by basshead81 View Post

that explains it....however the term is xmax which is how far the driver can extend/travel without bottomin

Okay gotcha thanks!. I was joking btw:D

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post #7 of 8 Old 06-29-2013, 05:20 PM - Thread Starter
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Quote:
Originally Posted by Tack View Post

You stay white here, Ill be black later. wink.gif


http://www.subwoofer-builder.com/xmax.htm

Thanks! Bookmarked that one

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post #8 of 8 Old 06-29-2013, 05:26 PM
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Xmax is the amount of linear excursion a driver has one one way in or out. Normally its measured in mm. Generally Xmax is considered the usable limits of a drivers range. And what is considered clean or linear output.

Its measured two ways. One, is to take the length of the magnet gap and divide by two. This is usually more conservative. The other is to measure when the value BL is at 70% of the of its original strength. Or when the motor (voice coil and magnet ) working together are at 70 percent of the total strength. Xmech on the other hand is how far a driver can move total one way. So when the driver runs out of suspension travel and can't move anymore and the driver is at or will bottom if pushed anymore . Xmech is measured in mm.

Excursion is usually a term meaning total travel of the driver both ways. and is often measured in inches.

You can't tell the loudness or quality of bass from only how far it can move in and out. of how far it will travel its not that simple.
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