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Torres and Cubic Feet Formula


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I have been trying to learn about enclosures lately so I have been tryin to design my own and also help my friends with there's. Last night a buddy text me and ask me if the dimensions 14 Tall, 35 Wide, 19 Deep would be enough for 2 12s in is Tiburon. I was away from my PC so I just multiplied the 3 numbers and divided them by 1728 (saw it on bcae1.com) and got 5.38 cubes. I told him sure because most 12s can do with 2cubes per sub. BUT this morning I just plugged the same dimensions into Torres and got 4.24 cubes. Is the 1728 formula not reliable or does Torres automatically figure in a variable that the formula doesn't?

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Torres is accounting for the wood thickness. You are not. The 4.24 is internal.

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I have been trying to learn about enclosures lately so I have been tryin to design my own and also help my friends with there's. Last night a buddy text me and ask me if the dimensions 14 Tall, 35 Wide, 19 Deep would be enough for 2 12s in is Tiburon. I was away from my PC so I just multiplied the 3 numbers and divided them by 1728 (saw it on bcae1.com) and got 5.38 cubes. I told him sure because most 12s can do with 2cubes per sub. BUT this morning I just plugged the same dimensions into Torres and got 4.24 cubes. Is the 1728 formula not reliable or does Torres automatically figure in a variable that the formula doesn't?

That's because when you done it you didn't subtract for the wood thickness,you needed to subtract an 1.5" from each measurement.

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Did you subtract 1.5 from all of those dimensions? You have to think in terms of INTERNAL dimensions. A box that is 35" wide on the outside is only 33.5" on the inside, if 3/4 material is used during construction.

Im not the one you want to try to troll. Just a fyi for you.

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Go with aero ports in that Tibby, you may even be able to run a portion of the port externally to save you from eating into the volume of the box.

Thanks, I have been trying to convince him to do it for that exact reason

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Yea I just went and search "1728 Torres" into the search box and found out why. Really should look more before I start asking questions. I'm an idiot :shrug:

Nothing with being an idiot, we all are ignorant about something. At least you came and asked someone and now you're less ignorant of box building. ;-)

To add to the above information, you also have to consider port, brace and driver displacement when actually designing a box, as all of those things reduce your net internal volume.

One last thing. If there is ever a discrepancy between a mathematical formula and a software program... math wins. Just double check that you're applying the math correctly.

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Single 15 would work great in a box like that.

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