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<blockquote data-quote="helotaxi" data-source="post: 5098522" data-attributes="member: 550915">With that power and that sub you&#039;re going to want some more port area.&nbsp; I spent nearly a day trying to get the ports to fit in a box for a pair of IXL 10s with enough port area to keep port velocity down.&nbsp; The port ended up about as big as the box and I couldn&#039;t fit PVC ports in the truck, much less the box.&nbsp; I was tuning MUCH lower, but a lower tune allows for less port area and moves the high velocity frequencies out of the primary freq range.&nbsp; I was also using less power (less than half that per driver) which allows for less port and I still needed a pretty big port.You don&#039;t need to use aero ports or precision ports to get a flare.&nbsp; You can simply use a router with a large roundover bit and get great results.&nbsp; Glue a piece of wood as a flange on the end of the port inside the box and use the roundover bit on it, too.&nbsp; Using a 4&quot; PVC port in that box with a 3/4&quot; roundover you should be OK with that tuning and power.&nbsp; The port needs to be 20 3/4&quot; between the flares.&nbsp; Without the flares you&#039;re going to get a TON of port noise with a single 4&quot; port.&nbsp; A pair of 3&quot; ports won&#039;t be much better.&nbsp; With the flares though a pair of 24&quot; long 3&quot; ports should have no problem with port noise.</blockquote>

[QUOTE="helotaxi, post: 5098522, member: 550915"] With that power and that sub you're going to want some more port area. I spent nearly a day trying to get the ports to fit in a box for a pair of IXL 10s with enough port area to keep port velocity down. The port ended up about as big as the box and I couldn't fit PVC ports in the truck, much less the box. I was tuning MUCH lower, but a lower tune allows for less port area and moves the high velocity frequencies out of the primary freq range. I was also using less power (less than half that per driver) which allows for less port and I still needed a pretty big port. You don't need to use aero ports or precision ports to get a flare. You can simply use a router with a large roundover bit and get great results. Glue a piece of wood as a flange on the end of the port inside the box and use the roundover bit on it, too. Using a 4" PVC port in that box with a 3/4" roundover you should be OK with that tuning and power. The port needs to be 20 3/4" between the flares. Without the flares you're going to get a TON of port noise with a single 4" port. A pair of 3" ports won't be much better. With the flares though a pair of 24" long 3" ports should have no problem with port noise. [/QUOTE]

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