Ge0,
Bassbox Pro cannot model one configuration with say 1000 watts and the other with say 500 watts within the same graph. Its a limitation of the program, however here is what two SD4-10 look like on 1000 watts sealedin 2 cu ft.
![Click image for larger version.
Name: 2x SD4 10 (blue).png
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ID: 10774](https://www.caraudiojunkies.com/attachment.php?attachmentid=10774&d=1594694821&thumb=1)
![Click image for larger version.
Name: 2x SD4 10 (blue) excursion.png
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ID: 10775](https://www.caraudiojunkies.com/attachment.php?attachmentid=10775&d=1594694821&thumb=1)
Here is that JL TW3 sealed at .8 cu ft vs ported at 1 cu ft with an fb of 32 Hz. As you can see, low end extension is much better with ported and within the passband of 30-80 Hz, excursion is also kept in check. When used in conjunction with a DSP to remove cabin gain, a ported configuration makes for one hell of a good high fidelity sub stage and gives you better SPL with less power.
![Click image for larger version.
Name: JL TW3 sealed vs ported.png
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ID: 10776](https://www.caraudiojunkies.com/attachment.php?attachmentid=10776&d=1594694821&thumb=1)