checking cone area?

[riadb]

How do you guys check the exact cone area of a sub under Iasca regulations??

is it the driver Sd?? or is there a precise formula for calculating this??

[SR]

use the diameter of the speaker and calculate the area of a circle


get a rule book there is a conversion chart

[riadb]

diameter of the speaker or the diameter of the cone + surround??



Dia X or Dia Y??


i know of the conversion charts but i know they are averages. Just lookin to get the exact value

[silent_riot]

For round woofers, if its a single 10, they use 10 inches (i.e. Area = pi*(10/2)^2). If its a single 12, they use 12 inches (i.e. Area = pi*(12/2)^2)....as simple as that.

If you are going to compete, I suggest you get a rulebook and study it. It will work to your advantage.

This is from the rulebook:

[riadb]

i have a PDF version of the rulebook


thanks guys

[nirmal_333]

read it lol i learn somethings from it also and i know you all do so i jut here to bugg u lol

[- Rovin's car audio -]

i doubt judges going to have time to measure each sub edge diameter to see if its 12" dead exact or 12.25 like how some subs r ...whether its 12.125 or 12.25 or whatever fraction they go by 12" ...

[JeremeCreamer]

Don't forget that square woofers are different from round woofers! ie - A square 12 will be 144 sq. in. and a square 10 will be 100 sq. in.

[audiopipe]

i think dey should actually measure cause d orion hcca sub ie hcca 15'' have a 15'' diameter cone b4 d surround
the 15'' hcca is actually 16.75'' external
another sub is the earthquake holees

[xeon]

so iasca dont go by the Sd den?

[riadb]

^^ daz what i thought but it looks like 10's is 10" 12's is 12" and so on

[SR]

correct because the slight difference in actual cone diameter etc will not take u over or under the present cone area categories

[Pirate]

^^^ exactly and imagine d trouble because of the subs wid d flat cones like d PPI flat piston woofers.

[riadb]

PPI flat piston woofers

flat cones actually have less cone surface area