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<blockquote data-quote="Steven Kephart" data-source="post: 802998" data-attributes="member: 548397">Here&#039;s a link to our tech page explaining XBL^2: <a href="http://www.adireaudio.com/Files/XBL2DetailsPaper.pdf" target="_blank">http://www.adireaudio.com/Files/XBL2DetailsPaper.pdf</a>XBL^2 pretty much takes the best of overhung and underhung.&nbsp; It acts as an overhung in that the coil is longer than a single gap.&nbsp; But it acts as an underhung as the coil is shorted than the top plate height.&nbsp; What happens is that the coil trades off between gaps.&nbsp; As it moves out of one gap, it moves into the other so no motor force is lost.&nbsp; In fact no motor force is lost until the coil starts to leave the single gap, and doesn&#039;t have another gap to move into (above and below the top plate).&nbsp; Since the coil is longer than a single gap, you get even more excursion without a loss in BL.&nbsp; It&#039;s a real clever way to get a lot of excursion out of a short coil/top plate (compared to the previous design).Here&#039;s a tech paper showing a comparison of the linearity of the different motor types: <a href="http://www.adireaudio.com/Files/XBL2TechPaper.pdf" target="_blank">http://www.adireaudio.com/Files/XBL2TechPaper.pdf</a>Steven KephartAdire Audio</blockquote>

[QUOTE="Steven Kephart, post: 802998, member: 548397"] Here's a link to our tech page explaining XBL^2: [URL="http://www.adireaudio.com/Files/XBL2DetailsPaper.pdf"]http://www.adireaudio.com/Files/XBL2DetailsPaper.pdf[/URL] XBL^2 pretty much takes the best of overhung and underhung. It acts as an overhung in that the coil is longer than a single gap. But it acts as an underhung as the coil is shorted than the top plate height. What happens is that the coil trades off between gaps. As it moves out of one gap, it moves into the other so no motor force is lost. In fact no motor force is lost until the coil starts to leave the single gap, and doesn't have another gap to move into (above and below the top plate). Since the coil is longer than a single gap, you get even more excursion without a loss in BL. It's a real clever way to get a lot of excursion out of a short coil/top plate (compared to the previous design). Here's a tech paper showing a comparison of the linearity of the different motor types: [URL="http://www.adireaudio.com/Files/XBL2TechPaper.pdf"]http://www.adireaudio.com/Files/XBL2TechPaper.pdf[/URL] Steven Kephart Adire Audio [/QUOTE]

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