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<blockquote data-quote="mcsoul" data-source="post: 4994552" data-attributes="member: 588440">I&#039;ll have to play with the re website and look at what you guysare talking about.Edit:It looks to me that using the OP&#039;s design, the port legnth the toolexhibits is 24.75&quot;, the actual legnth is 23.75&quot; and if you build the boxwith 23.75 with 2.9cft of volume your tune would be deeper than30.844; by my calculations anyway. It appears re is adding the displacementof the wood used to make the port to the figure of 2.9 (ft3). When you calculate2.77, which is the actual ft3 displacement, the port measurments arecorrect (or very close).&nbsp; The 24.75 measurement they use for port lengthis one I cannot explain, they are just adding an inch that I cannot account for.Basically, I&#039;m saying the ft3 they are using is off by the displacement of theport wood. Whatever, I&#039;ll use winISD to design the box and that RE tool looksgreat to determine the cutouts for the MDF.Just my opinion, there is a lot more brainiacs on here way better than me.I could be way wrong.</blockquote>

[QUOTE="mcsoul, post: 4994552, member: 588440"] I'll have to play with the re website and look at what you guys are talking about. Edit: It looks to me that using the OP's design, the port legnth the tool exhibits is 24.75", the actual legnth is 23.75" and if you build the box with 23.75 with 2.9cft of volume your tune would be deeper than 30.844; by my calculations anyway. It appears re is adding the displacement of the wood used to make the port to the figure of 2.9 (ft3). When you calculate 2.77, which is the actual ft3 displacement, the port measurments are correct (or very close). The 24.75 measurement they use for port length is one I cannot explain, they are just adding an inch that I cannot account for. Basically, I'm saying the ft3 they are using is off by the displacement of the port wood. Whatever, I'll use winISD to design the box and that RE tool looks great to determine the cutouts for the MDF. Just my opinion, there is a lot more brainiacs on here way better than me. I could be way wrong. [/QUOTE]

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