Cone Area Relation Chart

[Suicide Bobb 5,000+ posts]

Mods: I think you should sticky this, or suggest another title for the thread and sticky the new thread. This will reduce a lot of threads that ask "How many X sized speakers does it take to equal the cone area of nX sized speakers?" and also hopefully be a quick reference sheet for even the experienced to look at.

THESE NUMBERS ARE NOT EXACT! I rounded for almost all of the numbers, and for the charts that compare X speakers to nX speakers, I only picked those that were closely related in cone area. Since my calculator does not have a Pi function, I multiplied the radius squared by 3.14, which as most of you know is close enough. This chart is only meant to give you an idea of how similar the cone area of X speakers is to nX speakers.

As you can tell, I only went for common sized speakers. I'm not going to include speakers like the ear-shaped Yamaha woofer, or some one-off sub like the custom MTX Thunder 1,000,000. The sizes I chose are those of known production speakers (off the top of my head). Please let me know of any that I left out, and I will update each category to include them.

--------------------

One Speaker

Diameter of speaker | Cone area of speaker in square inches

34" ---> 908

32" ---> 804

22" ---> 380

21" ---> 346

18" ---> 254

15" ---> 192

13.5" ---> 143

12" ---> 113

11" ---> 95

10" ---> 79

8" ---> 50

6x9 ---> 42

6x8 ---> 38

6.5" ---> 33

4x10 ---> 31

5x7 ---> 28

5.25" ---> 22

4" ---> 13

3.5" ---> 10

2" ---> 3

--------------------

Two Speakers

X Speaker | Equivalent of 2X Speakers

3.5" ---> 5.25"

4" ---> 5x7

5.25" ---> 6x9

5x7 ---> 8"

6x8/6x9 ---> 10"

8" ---> 11"

10" ---> 13.5"

11" ---> 15"

12" ---> 18"

15" ---> 22"

22" ---> 32"

--------------------

Three Speakers

X Speaker | Equivalent of 3X Speakers

2" ---> 3.5"

3.5" ---> 5x7/4x10

4" ---> 6x8/6x9

5x7 ---> 10"

4x10/6.5" ---> 11"

6x8 ---> 12"

8" ---> 13.5"

10" ---> 18"

12" ---> 21"

18" ---> 32"

--------------------

Four Speakers

X Speaker | Equivalent of 4X Speakers

2" ---> 4"

3.5" ---> 5x7/4x10

4" ---> 6x8/6x9

8" ---> 15"

10" ---> 21"

11" ---> 22"

15" ---> 32"

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[Suicide Bobb 5,000+ posts]

Thanks for the sticky MoT!

 

[cheeto 10+ year member]

Suicide Bobb's has a lot more info for different size speakers, I made this one a few years ago to measure circular cones against each other. Colors are used to see how many of one size it would take to get the same cone area with another size.

And again as was argued before this isn't supposed to be accurate. Of course the cones are smaller than the basket size and I didn't account for the surround, but if I did the ratios would still be roughly the same, therefore the colors are still accurate.