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» Termpro Audio Forum » Our Archives » General Audio (1999-2001 Archives) » figureing c.u.f.t.

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Author Topic: figureing c.u.f.t.
shawMAN
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how do you figure out the cubic feet for a box?

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quote:
Originally posted by 13idnyk:
sometimes u just gotta take a nice evening deuce.



Posts: 4318 | From: Putnam County, IL | Registered: Nov 2001  |  IP: Logged | Report this post to a Moderator
Team BIO-Rick
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quote:
Originally posted by bigboomDD:
how do you figure out the cubic feet for a box?

inside L x W X H / 1728 = ^ft3

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Rick Logan

TEAM DB DRIVEN.

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160+db and gaining.....

I think that I have said too much....................I must go now................the SPL Ninja's are upon me  -
Need more power? UP YOURS!! with Excessive Amperage!


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Team Solo
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quote:
Originally posted by idbl_Fanatic:

inside L x W X H / 1728 = ^ft3



I 2nd that.

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Who needs a team? You kick azz in the lanes for yourself, nobody else.


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Hypnotized
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I third that


Just remember to subtract the thickness of the wood so you can figure out internal ft^3

[ 12-23-2001: Message edited by: Hypnotized ]

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Member: dB MAFIA

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78 Red Express
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how do you calculate it if its a slanted box??

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BassFromTheKrypt
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Length x Height x (Average depth of the top and bottom ... so if the top of the slant is 10" and the bottom is 14" the average would be... 12")
Kinda like Lenght x Height x (Top+Bottom/2)/1728

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2 POWER HX2 12's and 2 powerbd1500.1's [Wink]
Proud Member of TEAM B.L.O ME (Team Bass Lovers Of Maine)
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Posts: 523 | From: clinton, maine, usa | Registered: Jul 2001  |  IP: Logged | Report this post to a Moderator
Wagz
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or try out the12volt.com for some excellent box calcs.

Link to box calcs: http://www.the12volt.com/caraudio/boxcalcs.asp

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Currently serving my country as an Activated Army Soldier - Praying to be demobilized so I can get to work on my Monte!

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(all sitting in boxes [Frown] )


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rbrewervw
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Calculating the cubic feet of a box is no different than calculating the volume of anything else. It is Length x Height x Width.

The 1728 number is 12 x 12 x 12.

If you measure your internal dimentions in inches, then you can convert to cubic feet by dividing by 1728.

Ok now for the fun stuff....

The way to calculate the volume of a cylinder is pi x radius^2 x Length.

This comes in handy when calculating displacement of a port.

Example: 4 inch round port that is 10 inches long. 4^2 x 10 =160 cubic inches.

The way to calculate the area of a triangle is 1/2 Base x Height.

So if you need to calculate the volume of a wedge box, divide it into two parts.

Example: Top Length=10" Bottom Length=14" Height=13" Width=15"
10" x 13" x 15" = 1950"
(1/2)4" x 13" x 15" = 390"
1950" + 390" = 2340"
2340" / 1728 = 1.35 Cu. Ft.

Hard to explain for me... May be some one else can do a better job.

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Premier 930
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mtxbird
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hey rbrewervw where are you from in michigan im by detroit

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04 extreme blazer
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brandon

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Rock99
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I am from Houghton lake. I have family in Redford and Lavonia.

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Josh LaRoque
ADVANCED CAR AUDIO
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In memory of Eddy Worman

Posts: 4591 | From: Manton, MI | Registered: Apr 2001  |  IP: Logged | Report this post to a Moderator
   

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