Mister.Lull Wrote:
I have FINALLY downloaded this program and have only one question.
When you're calculating a box with it, does it take into account the
volume of the Port and driver or is it just giving you a good start on
the whole process?

Mister.Lull
It does not - and should not - as no software should, unless explicitly
stating that it is providing this separate service for you (and still
should never be at the expense of the raw air volume number).

After all, the software doesn't know how you are going to build this
enclosure...
Is your subwoofer going to be mounted standard, or inverted?
How much displacement does the rear of the subwoofer take up (each sub
is different)?
How are you going to build your ports - and from what material? Will
any of the port walls be common with the enclosure's walls? Based on
that information, what displacement will the ports actually take up?
...if you include them inside the box -after all, will the ports be
built inside the box, or outside the box? Or perhaps a combination of
both?

If software were to factor in subwoofer and port displacement, it would
be presuming and assuming *a lot*... which could end up being very
misleading - and difficult to "un-calculate", should you desire to
build something a little custom.

Bottom line - the number shown in the program is the actual volume of
*air* inside the box.


--
geolemon


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I have FINALLY downloaded this program and have only one question.
When you're calculating a box with it, does it take into account the
volume of the Port and driver or is it just giving you a good start on
the whole process?

Mister.Lull

I think WinISD is a great program for freeware.

Here's what I did for a ported box.

First, pick your driver (or enter your own TS parameter).
Then enter the recommended volume and chose the port shape, number, width,
etc.) It'll spit out a box dimension and port length. This is, as others
have said, the air volume.

I then save this file with a name that gives the port length (e.g. RF3212DVC
1 square port 22 inches by 1.5 inches.)

Now go to the box shape; it will pick a favored shape. If you want to
change any dimensions enter them and click the others (depth, width, etc.)
and they will change to accommodate the one you altered.

Don't forget to enter your MDF thickness.

Now you need to account for the airspace the port/s are going to take up. I
used an online calculator for volume in cubic feet. Include the thickness
of the material that the port is made of. You'll need cylinder or cube
volume calculator.

If you use a square port and one side is shared with the box you don't have
to include the box thickness on that side to figure the port volume.

Next, save this file again (e.g. RF3212 1 square 22 inch port airspace
included) because the port length specified will change from the first
calculation, and you want to use the port length from the first one (the raw
air one) That's why I save the original port dimensions in the filename.

This will give you a box dimension that includes the air displaced by the
port (if it's internal).

Hope this helps, and enjoy!
Rich






"Mister.Lull" wrote in message
ups.com...
I have FINALLY downloaded this program and have only one question.
When you're calculating a box with it, does it take into account the
volume of the Port and driver or is it just giving you a good start on
the whole process?

Mister.Lull