Sd msqM?

[n2audio 5,000+ posts]

Its simple. Im telling you from testing. Do you know what the most difficult parameter to meausre is? Its VAS.The diaphrams shape is directly related to tge formula you use to derive the actual pistons surface area.

Sd

Here is one link..

Understanding Loudspeaker Data | Eminence Speaker

Sd-this is the actyal surface area oonthe cone note te use of tge word cone..

So either you've changed the topic to avoid admitting you're wrong, or you've changed the topic because you're not smart enough to know we're talking about two different things.

Sd is still radiated area.

For vas you need to know the volume of the cone because you need to know the precise volume of air being compressed.

 

[Papermaker85 5,000+ posts]

So either you've changed the topic to avoid admitting you're wrong, or you've changed the topic because you're not smart enough to know we're talking about two different things.

I don't think you understand what i mean. Sorry i typed that on my Phone I know it is terribleI mentioned vas because with out knowing MMS, CMS, or SD, you can't find Vas. slightly different measurements in SD change vas and can give you inaccurate parameters. not to mention any pressure changes in the atmosphere while measuring parameters

Sd is still radiated area.

its SURFACE area of the diaphragm. what i mean by this its the area that acts as a piston. a moving surround is not a solid diaphragm and shouldn't be considered part of it. why? its simply to inaccurate to guess and its not linear in stroke as well..

For vas you need to know the volume of the cone because you need to know the precise volume of air being compressed.

im not sure what you are taking about because that's not the case.
Vas is the compliance. Its based on mms cms and SD. nothing to do with displacement.

SD is the surface area of the diaphragm. unless the diaphragm is flat you can't use PI*r^2.