formula for cone area

[denalilvr 10+ year member]

hey guys im trying to figure out the cone area for a 15'' sub..i know its 176.63 but how do you come up with that answer?

what i have is 1x(3.1415)(7.5)^2=47.12 is what im getting..and obviously thats wrong..so can someone lend a hand?

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[97gp 5,000+ posts]

15" sub has 15" of cone area duh.

 

[Basic1906 10+ year member]

176.7146

By the way the formula is A=Pi * Radius Squared or

(3.1415)(7.5)(7.5)= 176.71

 

[denalilvr 10+ year member]

176.7146

i know the answer i just need the formula for comming up with the answer

 

[Immacomputer 10+ year member]

hey guys im trying to figure out the cone area for a 15'' sub..i know its 176.63 but how do you come up with that answer?
what i have is 1x(3.1415)(7.5)^2=47.12 is what im getting..and obviously thats wrong..so can someone lend a hand?

First off, make sure you know how to use a calculator:

http://www.google.com/search?source=ig&hl=en&rlz=&q=%283.1415%29%287.5%29%5E2&btnG=Google+Search

Second, that's not an accurate way of measuring cone area. Cone area (Sd in the Theille/Small parameters) only considers part of the surround to be considered part of the moving area (some use 1/3 others have used 1/2.. it really depends). So taking 7.5 as the radius is not a correct way of finding cone area. Just look under the parameters of the driver and find Sd. That is the best answer.

 

[grimreper912003 5,000+ posts]

15" sub has 15" of cone area duh.

lol you say duh yet your the one who is wrong...//content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

 

[PSturmer 10+ year member]

lol

 

[Canaan 10+ year member]

You do realize that a 15" round sub's cone does not actually have a 15" diameter...right?

Different cone and surround styles allow for different cone area.

For example:

DD3512 > RE SX12 > Eclipse Ti pro 12

All are 12's but TOTALLY different cone area.

Check the T/S, thats about the only way to really find out.

 

[lilmaniac2 5,000+ posts]

15" sub has 15" of cone area duh.

genious

pi r ^2 is what meca used to use for cone area

 

[PSturmer 10+ year member]

so who here can tell me how to maximize the volume of a cone?

 

[denalilvr 10+ year member]

thanx for the help..

 

[squeak9798 5,000+ posts]

Sd = (3.1416 x D^2)/4

where "D" is the diameter of the cone [the actual cone itself, NOT the subwoofer's diameter] plus 1/3 of the surround (or 1/2 if that be the case)

 

[ultimate157 5,000+ posts]

lol you say duh yet your the one who is wrong...//content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

Looks like someone failed internet sarcasm 101.

 

[casper97ta 10+ year member]

Does anybody have the link that shows the table/chart of cone area that i think was on usaci website?? I've looked and couldnt find it anymore

 

[grimreper912003 5,000+ posts]

Looks like someone failed internet sarcasm 101.

I was never any good in classes //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif