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SUB BOX 

 

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 Post subject: SUB BOX
Posted: Mon Apr 20, 2009 10:38 pm 
Stock as a Rock
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how do i calculate the litres of a subwoofer box
the measurements are:
62cm
<------> ^
| 50cm
|

 

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 Post subject: Re: SUB BOX
Posted: Tue Apr 21, 2009 5:44 am 
Oompa Loompa
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V=(LxW)xH
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 Post subject: Re: SUB BOX
Posted: Tue Apr 21, 2009 2:32 pm 
Stock as a Rock
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Make sure that's the inside measurements & if it is a triangulated sub enclosure, use the above formula to find the volume of 'imaginary' box and half it. It gets more complicated if there is an angle cut off on one edge, but you just calculate the volume that is missing by the above formula again/halving it and subtracting that away from the total overall box size.
Hope that's not too complicated without pictures (cause I can't do them).

 

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 Post subject: Re: SUB BOX
Posted: Tue Apr 21, 2009 3:03 pm 
Stock as a Rock
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62cm x 50cm x what?

Need to measure it in 3 directions.

10cm x 10cm x 10cm = 1000cm^3 and is 1 litre

62 x 50 x 50 = 155000 = 155 litres

 

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 Post subject: Re: SUB BOX
Posted: Tue Apr 21, 2009 4:43 pm 
Stock as a Rock
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62cmx50cmx70cm=
so would this be 217litres:S

 

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 Post subject: Re: SUB BOX
Posted: Tue Apr 21, 2009 5:23 pm 
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Is that inside dimensions?
You need to subtract the thickness of the mdf x2 for each measurement if it's not.

 

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 Post subject: Re: SUB BOX
Posted: Wed Apr 22, 2009 9:55 am 
Stock as a Rock
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el-ghia wrote:
62cmx50cmx70cm=
so would this be 217litres:S


Yes

 

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 Post subject: Re: SUB BOX
Posted: Wed Apr 22, 2009 11:58 am 
Parts Gopher
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How many liters do you want the box?

If you want to build the box to a certain volume, work with cubic centimeters for the unit of volume... and use centimeters for the unit of measurement (instead of mixing liters and centimeters) and make an equation.

Volume = L x W x H

This equation will only work with cubes / rectangles... it wont work if there are any triangles... if there are triangles, you have to do the calculations in 2 steps. One to work out the volume of the triangle area, and one to work out the volume of the cube area.


eg, if you want a 200 liter box;

200000 = 62 x 50 x H
62 x 50

200000 = 3120 x H
divided 3120 = divided by3120

64.1025641 = H

H = 64.1025641 centimeters


If you don't know the maths (my dad doesn't know, he is 44) I can do it for you :P
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