Building a new box, but ran into an issue. - Realm of Excursion



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Old 12-05-2014   #1 (permalink)
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Default Building a new box, but ran into an issue.

I'm working on a new box, and the distance to the end of my port and the wall is exactly the port width. How is that calculated? Heres a pic to see what I mean(sorry for the ****ty drawing)


When calculating does it stop at the end of the port? Or do you add half the port width, plus half port width, plus thickness of the wood added? If it's calculated like in my drawing, my port length would be 40.25". Wouldnt I add 1.5"+1.5"+.75, which would make the length 44"? I was thinking you treated it like another bend in the port. I have everything but the port cut, and my google searches havent turned up an answer. Can someone help me out so I can get this thing together?
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Old 12-05-2014   #2 (permalink)
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Default Re: Building a new box, but ran into an issue.

if you are calculating lenght then you are correct with the 40.25".....length down the middle from start to the end
when calculating the port displacement then you add the wall thickness in the overall.
hope this helps if not feel free to post again as one of the wise minds may be able to give better info.
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Old 12-05-2014   #3 (permalink)
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Default Re: Building a new box, but ran into an issue.

Here's a less confusing explanation I posted on another forum. After looking at my original post and drawing, I managed to confuse everybody lol.

Okay, I made some better drawings and ill try to make it less complicated. My port width is 3"

If I stop measuring port length at the red arrow, my port length is 40.25. I need it just a little longer.


The end of of port piece B is 3"(port width) from the wall. If I stop at the yellow arrow, my port length would be 43.25". I calculated this by the centerline of the port. For example: If I were to add a panel C that was 3" long my port would be 46.25" long, so I subracted 3" since there is no panel C. Is that correct, since 43.25" would be the end of the port. This is what I'm thinking is the correct way, but I want to make sure. I bought a 2nd sub, so I wanted to keep the volume, tuning, and port area per sub as close as I could. I need between 43.25-44" of port length to be tuned where I want it.
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Old 12-05-2014   #4 (permalink)
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Default Re: Building a new box, but ran into an issue.

the yellow arrow would indicate the start of the port inside the enclosure so i think you have the math correct.
13.75 + 28 + 1.5 + .75 = 44" adding it all together including the .75 for the wall thickness i come up with 44"
hopefully one of the more knowledgable will chime in
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Old 12-05-2014   #5 (permalink)
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Default Re: Building a new box, but ran into an issue.

Ok, that's exactly how I was doing it. A member of another forum said that is the correct way as well, so I think I'm good to go. I cant wait to see what a 2nd sub and 2.5x the Power is gonna do
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