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<blockquote data-quote="whitemdx" data-source="post: 3271781" data-attributes="member: 568206">I am no expert when it comes to ported box, but here what i&#039;ve learned from designing my 1st ported box.&nbsp; Don&#039;t trust the RE box calculator, it a good estimate, use winISD, it should be more accurate.&nbsp; In my case, using the same dimensions.&nbsp; RE calculated a lower tuned frequency as well as a bigger NET volume.&nbsp; Read the sticky &quot;Simple EDU: How to design a ported box&quot; in this section.It pretty straight forward, basic you want 12-16in of port area for each cubic feet of NET volume (for you 36-48 in).&nbsp; If you are pushing alot of power, i would go for the higher number.&nbsp; The more port area, the lesser chance of getting port noise.I don&#039;t have the Fi Q, but read alot on it b/c it was one of my top choice.&nbsp; Optimum tunning freq seem to be in the low 30&#039;s.&nbsp;&nbsp; Go here <a href="http://www.soundsolutionsaudio.com/forum/index.php?showforum=58" target="_blank">http://www.soundsolutionsaudio.com/forum/index.php?showforum=58</a>there are quite a few fi Q review, so read their setup and then determine what best for you.&nbsp; Somehow i feel your port area and displacement is a little small.&nbsp; I built as 2.25ft^3 box for a 12 in, and my port area was 39 in^2 with 1.04 ft^3 disp. and that at 33 Hz.&nbsp; So run winISD and double check.</blockquote>

[QUOTE="whitemdx, post: 3271781, member: 568206"] I am no expert when it comes to ported box, but here what i've learned from designing my 1st ported box. Don't trust the RE box calculator, it a good estimate, use winISD, it should be more accurate. In my case, using the same dimensions. RE calculated a lower tuned frequency as well as a bigger NET volume. Read the sticky "Simple EDU: How to design a ported box" in this section. It pretty straight forward, basic you want 12-16in of port area for each cubic feet of NET volume (for you 36-48 in). If you are pushing alot of power, i would go for the higher number. The more port area, the lesser chance of getting port noise. I don't have the Fi Q, but read alot on it b/c it was one of my top choice. Optimum tunning freq seem to be in the low 30's. Go here [URL="http://www.soundsolutionsaudio.com/forum/index.php?showforum=58"]http://www.soundsolutionsaudio.com/forum/index.php?showforum=58[/URL] there are quite a few fi Q review, so read their setup and then determine what best for you. Somehow i feel your port area and displacement is a little small. I built as 2.25ft^3 box for a 12 in, and my port area was 39 in^2 with 1.04 ft^3 disp. and that at 33 Hz. So run winISD and double check. [/QUOTE]

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