How do you measure a speaker cone's surface area?

Posted by Inmate51 (P) on May 12, 2025 at 09:10:56

In Reply to: How do you measure a speaker cones surface area? posted by seancuster71@gmail.com on May 9, 2025 at 19:30:17:

You asked for the surface area of a cone. You did not ask for the effective radiating area of a loudspeaker diaphragm.

From a physics standpoint, these are two different things.

The effective radiating area of a direct radiator driver can be considered to be Pi*r2 of the cone diameter, plus, as Tomservo noted, some portion of the surround (which will vary based upon the type of surround, and varies with frequency, but in any case, is negligible for drivers where the diameter is large compared to the surround).

Cone surface area is a little more complicated, but is still solid geometry. I don't have the formula at hand, but you can probably find it fairly easily.

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Follow Ups Full Thread

Topic - How do you measure a speaker cones surface area? - seancuster71@gmail.com 19:30:17 05/9/25 (20)

It's more complex than that - Ozzie 19:37:04 05/12/25 (0)

RE: How do you measure a speaker cones surface area? - Bill the K 19:27:03 05/12/25 (0)

How do you measure a speaker cone's surface area? - Inmate51 05/12/2509:10:56 05/12/25 (0)

I think it involves Pi, therefore indeterminate. - dgaapc7 01:56:14 05/12/25 (0)

circle vs cone area - walkstoslow 07:23:42 05/10/25 (6)

RE: circle vs cone area - walkstoslow 07:33:22 05/11/25 (0)

Being attached - E-Stat 07:36:29 05/10/25 (4)

RE: Being attached - hahax@verizon.net 20:46:14 05/10/25 (3)

RE: Being attached - rrikola@hotmail.com 18:47:09 05/11/25 (2)

RE: Being attached - hahax@verizon.net 20:49:21 05/11/25 (1)

You've been talking - E-Stat 08:20:25 05/13/25 (0)

RE: How do you measure a speaker cones surface area? - tomservo 06:00:45 05/10/25 (0)

RE: How do you measure a speaker cones surface area? - hahax@verizon.net 20:37:20 05/9/25 (7)

RE: How do you measure a speaker cones surface area? - seancuster71@gmail.com 20:56:44 05/9/25 (0)

RE: How do you measure a speaker cones surface area? - seancuster71@gmail.com 20:54:26 05/9/25 (5)

Agree that area formula - E-Stat 21:12:30 05/9/25 (4)

RE: Agree that area formula - seancuster71@gmail.com 21:24:21 05/9/25 (3)

RE: Agree that area formula - hahax@verizon.net 20:44:24 05/10/25 (0)

Nominal dimensions - tlea 05:53:35 05/10/25 (0)

I've used that before - E-Stat 05:51:40 05/10/25 (0)

Follow Ups

How do you measure a speaker cone's surface area? - Inmate51 05/12/2509:10:56 05/12/25 (0)

How do you measure a speaker cone's surface area?

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