Noobie

[vwgti]

Im looking to make a slot ported box, that is 2 cubic feet internal volume, the port will 14x2 inches. Im looking to make this box taller than it is width or depth, think rectangle. I will be using 3/4 mdf, and my math is bad but I calculated around 0.6 cubic feet port volume. So a 2.6 cubic foot box should work right??

If anyone can help me with this math Id be reall happy ops:

[BeerParty]

Nope. You have to include the port volume and the volume of the MDF used to make the port. The simplest thing to do is put the info into a spreadsheet and have it do the calculations for you. Then you can 'play' with the dimensions and see the volume changes real time.

Edit: Also, for a slot port you have to provide three dimensions - length x width x height.

[vwgti]

Ok well what I have modeled in winisd, is a 2 cubic foot enclosure tuned to 40hz. The port will be 2inches tall, 14 inches wide, and it estimates the length to 11.93.

Is there a open source spreadsheet program?? I dont have excel or anything.

[Mattcc22]

Hometheatershack.com has volume calculators.

[CADman_ks]

...

Is there a open source spreadsheet program?? I dont have excel or anything.

I would download and install the OpenOffice:

http://www.openoffice.org/

Or, the same spin-off LibreOffice:

www.libreoffice.org/

Now, before the open source community flames me, I think that it's important to realize that both of these products will do the same thing, create native spreadsheets and open and save Excel created spreadsheets which the OP is ultimately wanting to do.

One thing to realize, though, is that I don't believe that either one of these offerings will run Excel spreadsheets that have macros in them, or at best will be only able to run very simple macros. That is one pitfall to the open source stuff...

[cjd]

2x14 is a HUGE port. I can't imagine it needs to be anywhere near that big. That's just starters.

1x7.5" is equivalent to a 3.1" diameter round port.