"Argument" with online box-builder...

[dwright27]

Now would you subtract that area underneath the "l" piece running into the box? From the diagram, it looks as if they just took the volume of that square to get 1.02 and not just the volume inside the port? From the dimensions, the volume of the port is .7265625^3ft. Btw, i was using the generic 12volt calculator...

i used 23 for port length.

8.75 rounded to 9

13.75 rounded to 14

[MrSkippyJ]

I used 16.75" for port length or is that the wrong number.

Well it is at least 16.75+11.75. Nothing is drawn to proportion in the drawing, it is rather confusing. The port is 28.5 long (not counting any end correction factor or whatever that is called).

[95_1500]

3.15 after port displacement, so assuming 12" woofer call it 3 after woofer displacement.

15.5H x 3W x 28.5L port which comes out to 34.24 hz

Its almost exactly what its claimed to be you wont notice a difference between 34 and 35 hz

Dustin, you know you measure the port down the middle right? Not the sides of it

[JCiarlino]

Well it is at least 16.75+11.75. Nothing is drawn to proportion in the drawing, it is rather confusing. The port is 28.5 long (not counting any end correction factor or whatever that is called).

Ahh, I see :facepalm: The not drawn to proportion was screwing with me.

[MrSkippyJ]

Ahh, I see :facepalm: The not drawn to proportion was screwing with me.

yeah it is WAY out of proportion too. Messes with your head a bit.

[dwright27]

Dustin, you know you measure the port down the middle right? Not the sides of it

BAH!!

my fault

[95_1500]

BAH!!

my fault

Shit happens

[PUNKYOU007]

If I could ask how much your paying for these designs?

Look up "Forum Asshole" on here. He does some great designs and you dont have to worry about it being wrong. You get a 3D CAD drawing and a cut list. Very reasonable on the prices too.

[nCOMP1337]

out of proportion just sucks, and i would think if the guy sold things online he would have a better way of diagramming these designs

i draw all my deigns on graphic paper with the assumed thought of each square being 1 inch, so even if tis not actual size its proportional and to scale

then once i get a diagram how i like it, i recreate it to scale in photoshop

anyways hopefully those guys helped you out, too many doing the math, i figured id just throw a comment int here to break it up

[Cashdollar2009]

If I could ask how much your paying for these designs?

Look up "Forum Asshole" on here. He does some great designs and you dont have to worry about it being wrong. You get a 3D CAD drawing and a cut list. Very reasonable on the prices too.

Actually he didn't advertise the design. He assembles them and ships to customers. I suppose that is what a pre-fab box is, but before i let my friend order it, and knowing the reputation of some pre-fabs, i emailed him asking for the port dimensions and whatnot, he sent me the schematics. And kynto, that makes PERFECT sense. I forgot to originally mention the out-of-proportioness of the diagram in my original post, drawing to scale makes things a hell of a lot easier on the brain.