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<blockquote data-quote="helotaxi" data-source="post: 1977433" data-attributes="member: 550915">A ported box tuned for flat response will typically be 3 dB louder right at the box tuning freq compared to a .7 Qtc sealed box.&nbsp; If you setup the ported box to exhibit a response peak you can make it MUCH louder than any sealed box.&nbsp; Excursion really doesn&#039;t matter in the ouput of a ported box.&nbsp; The port is producing most of the output around tuning where the excursion is the least and also where the port exerts the most control of the cone movement.&nbsp; That said if you can provide enough power to drive the sub to a high excursion level in a ported box it will be that much louder.Figure you have to more than double the excursion to equate to the extra efficiency of the ported box.&nbsp; To do that you are going to have to provide much more than twice the power because the motor strength decreases as excursion increases (there are exceptions such as the W7 and the XBL subs, but with those, once motor strength starts to drop off it drops much faster than a conventional sub.)&nbsp; Run that same power to a sub ina ported box and it will still be louder.&nbsp; If loud is what you are looking for, ported is the way to go.</blockquote>

[QUOTE="helotaxi, post: 1977433, member: 550915"] A ported box tuned for flat response will typically be 3 dB louder right at the box tuning freq compared to a .7 Qtc sealed box. If you setup the ported box to exhibit a response peak you can make it MUCH louder than any sealed box. Excursion really doesn't matter in the ouput of a ported box. The port is producing most of the output around tuning where the excursion is the least and also where the port exerts the most control of the cone movement. That said if you can provide enough power to drive the sub to a high excursion level in a ported box it will be that much louder. Figure you have to more than double the excursion to equate to the extra efficiency of the ported box. To do that you are going to have to provide much more than twice the power because the motor strength decreases as excursion increases (there are exceptions such as the W7 and the XBL subs, but with those, once motor strength starts to drop off it drops much faster than a conventional sub.) Run that same power to a sub ina ported box and it will still be louder. If loud is what you are looking for, ported is the way to go. [/QUOTE]

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