if i did the math right, it looks like your sub will be in 1.09 cubes.
thanks for the reply...i didnt thank anyone was gonna help me out!!!
heres how i came up with my port lenth and box dimensions....
my answers are in parentheses, and highlighted in red
1. Figure desired NET volume, port area, and tuning.
(1.5 net, 30.875, 33hz)
2. Write down max, or desired Width x Height x Depth.
(32x11x?16?)
3. Pick the dimension of 2 sides you want, and leave the third side as a variable. (s) Multiply the two sides together and write this off to the side.
(32x11=352)
4. Open WinISD, and pick an arbitrary driver. Continue to ported.
(i used jl's 10w6)
5. Type in your desired box volume, this is the NET Volume, as well as desired tuning.
(1.5 cubes)
6. Go to vent tab, click on the circle symbol to change it to a square. (this is for slot port). Type in desired port dimensions (for desired port area). It will give you the needed port length. Write this down.
(3.25 x 9.5 = port length of 46.13 with one flanged end, end correction factor)
7. This is where simple algebra comes in. Take the port width and add .75" to it for the port wall. Now find out the volume of the port. Do this by multiplying: (Width(+.75) * Height * Length) / 1728 | This is your port displacement. Write this down.
(4x9.5x46.13/1728=1.014 port displacement)
8. Take your NET volume, add port displacement, add sub displacement, add any other displacements (bracing, etc.) This is you internal GROSS volume. This is how big the box needs to be internally for correct NET volume and tuning. Write this down.
(1.5 net + 1.014 port displacement + .15 sub displacement= 2.664 gross volume)
9. More Algebra. You will be solving the following algrebraic equation for (s), this will give you the internal dimension of the last side (the variable you chose.) Actually, here is the equation solved for (s).
Equation:
S = (GrossVolume * 1728) / (Product of remaining two sides)
S = (2.664 * 1728) / 352
S = 4603.392/352
S = 13.078 internal length of last side which is 14.578
so i made the box 32x11x14.6, and i put the port in using the length winisd gave me.
Is this correct or am i missing something???
