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  #1  
Old 03-24-2010, 08:17 AM
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Join Date: May 2009
Location: Buckinghamshire, UK
Here's how to calculate speaker volume.

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I've seen a few people ask this and I wanted to know myself - so here's a site that allows you to calculate the volume of a speaker. The proper name for the shape is 'conical frustum'.

Click here.

Last edited by ColinB : 03-24-2010 at 08:21 AM. Reason: Stupidity??
  #2  
Old 03-24-2010, 08:56 AM
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I don't have any idea how calculate the vol. , I only worry about matching up my heads to my cabs (watts and Ohms) .................and keeping it loud enough for me to have fun but not to loud to disturb the neighbors.....
  #3  
Old 03-24-2010, 10:50 AM
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Quote:
Originally Posted by waleross View Post
I don't have any idea how calculate the vol. , I only worry about matching up my heads to my cabs (watts and Ohms) .................and keeping it loud enough for me to have fun but not to loud to disturb the neighbors.....
But if you're going to build your own cab - which quite a few on this forum do - then you need to know the volume of the speaker, ports and bracing. This is because if WinISD calculates a (say) 45 litre box then you need to build a (say) 53 litre box so the volume of the speaker, ports and bracing bring the actual 'free' volume in the cab down to 45 litres.
  #4  
Old 03-24-2010, 08:05 PM
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Join Date: May 2006
Location: austin,tx
Cool, now there's some useful info. So far I've been taking the diameter where it comes through the back of the baffle, then the diameter of the back of the magnet, averaging them and figuring the volume of a cylinder. Figured it was close but not right on.
  #5  
Old 03-24-2010, 08:12 PM
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Quote:
Originally Posted by ColinB View Post
The proper name for the shape is 'conical frustum'.
Because 'speaker volume' is too lame and obvious
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  #6  
Old 03-24-2010, 08:13 PM
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Very cool. Thank you!!!
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  #7  
Old 03-24-2010, 08:19 PM
qts qts is offline
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sorry ColinB, if WINISD calculates a 45 litre box, it is the netto volume because it doesn't know what's in there,for exaple;the shape of the speaker(s), bracing(how much), air mass in the port(s), so you have to ADD the volume taken up by these things. So the total volume become more then 45 litres

Last edited by qts : 03-24-2010 at 08:22 PM.
  #8  
Old 03-24-2010, 08:33 PM
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Location: Minneapolis, MN
Just use the Archemides method: Fill the tub with a known amount of water, make lines for each liter more and immerse the speaker...

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  #9  
Old 03-24-2010, 08:37 PM
qts qts is offline
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now i see, we explane it in a different way
  #10  
Old 03-24-2010, 08:41 PM
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Location: Houston, Texas
Quote:
Originally Posted by ColinB View Post
I've seen a few people ask this and I wanted to know myself - so here's a site that allows you to calculate the volume of a speaker. The proper name for the shape is 'conical frustum'.

Click here.
Nice..if I was mathematically-inclined this would probably be one of my browser bookmarks. Good to know its there though, thanks for posting it!
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