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<blockquote data-quote="TeoTorriatte" data-source="post: 4629208" data-attributes="member: 571999">In a sealed enclosure, piston area * Xmax will determine total potential linear displacement. So in this case, yes... if you have the power to move the driver to that point, a 12&quot; sub with 27mm Xmax is going to be louder than a 12&quot; with 12mm Xmax. Now, the driver with lower Xmax could very well be quite a bit louder with low power, but once it reaches excursion limits, the driver with the longer stroke will take over.A ported enclosure is a totally different animal, especially when referring to SPL comp setups. Motor strength comes into play a lot more, but suspension travel does still need to be great enough to move a lot of air. With a ported enclosure, the port will move the most air when the driver itself is moving the least.In the case of ported SPL setups, you send the sub a ton of power at tuning (preferably close to the car&#039;s resonant frequency) and the port moves a lot of air. If you can come up with enough power to get a driver with a ton of suspension travel (different than Xmax) to reach limits at tuning, you will likely put up some pretty good numbers (providing all your other ducks are in a row).Oh snap, audioholic beat me to this... oh well, I&#039;m posting it anyways... //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif</blockquote>

[QUOTE="TeoTorriatte, post: 4629208, member: 571999"] [B]In a sealed enclosure[/B], piston area * Xmax will determine total potential linear displacement. So in this case, yes... if you have the power to move the driver to that point, a 12" sub with 27mm Xmax is going to be louder than a 12" with 12mm Xmax. Now, the driver with lower Xmax could very well be quite a bit louder with low power, but once it reaches excursion limits, the driver with the longer stroke will take over. A ported enclosure is a totally different animal, especially when referring to SPL comp setups. Motor strength comes into play a lot more, but suspension travel does still need to be great enough to move a lot of air. With a ported enclosure, the port will move the most air when the driver itself is moving the least. In the case of ported SPL setups, you send the sub a ton of power at tuning (preferably close to the car's resonant frequency) and the port moves a lot of air. If you can come up with enough power to get a driver with a ton of suspension travel (different than Xmax) to reach limits [I]at tuning[/I], you will likely put up some pretty good numbers (providing all your other ducks are in a row). Oh snap, audioholic beat me to this... oh well, I'm posting it anyways... [IMG]//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif[/IMG] [/QUOTE]

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