sub calc

i was wondering how you find out the sq" of a sub or if someone has a list of sub sizes and sq".

Sub qty 8” 10” 12” 15” 18”
1 50.24 78.50 113.04 176.63 254.34
2 100.48 157.00 226.08 355.25 508.68
3 150.72 235.50 339.12 532.88 763.02
4 200.96 314.00 452.16 710.50 1017.4
5 251.20 392.50 565.20 888.13 1271.7
6 301.44 471.00 678.24 1065.8 1526.0
7 351.68 549.50 791.28 1243.4 1780.4
8 401.92 628.00 904.32 1421.0 2034.7
9 452.16 706.50 1017.4 1598.6 2289.0
10 502.40 785.00 1130.0 1776.3 2543.4

thats the round size. wats your email? i can send you all the rule pages

The rule book is changing a little, but I will have a new copy on the forum as soon as it is finalized.

where are the new rules?

hey my e-mail is twstd_koncepts@hotmail if you get a chance to e-mail me the old rules so i can see what changes when the new ones come out. Thanks

Area = Pi * radius ^2 is the formula. First thing you need to do is find the radius which is half the circle. We will use a 12 inch speaker for a example. 12 divided by 2 = 6. Now that we have radius we times it by its self to get radius squared. 6 x 6 = 36. Once we have radius ^2. We times it with Pi. 36 x 3.14 = 113.04 square inches in a 12 inch sub.

113.04 = 3.14 * 36

Square subs are much easier to figure. To figure a square sub it is simple. area = length * width. so a 12 inch square sub would be 12 * 12 = 144 square inches.

or pi * Diameter^2 / 4 it works too