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Speaker diameter measurement
Speaker diameter measurement
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Old 14th November 2017, 04:42 PM   #1
diy1995 is offline diy1995
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Default Speaker diameter measurement

Hello,
I want to test my woofer for T/S parametres and I would like to know from where to where exactly do I measure speaker diameter?
Thank you for help
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Old 14th November 2017, 05:02 PM   #2
j.michael droke is offline j.michael droke  United States
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Speaker diameter measurement
Hi there 1995: Measure across the center of the driver (speaker) from 1/2 of the surround across to the other side at 1/2 of the surround. This is considered standard measurement. ...regards, Michael
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Old 14th November 2017, 05:06 PM   #3
scottjoplin is offline scottjoplin  Wales
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Hi, you need to measure the area of the diaphragm Sd, this should help Thiele/Small parameters - Wikipedia
and quoted from the above : Sd
Measured in square metres (mē). The effective projected area of the cone or diaphragm. It is difficult to measure and depends largely on the shape and properties of the surround. Generally accepted as the cone body diameter plus one third to one half the width of the annulus (surround). Drivers with wide roll surrounds can have significantly less Sd than conventional types with the same frame diameter.
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Old 14th November 2017, 05:39 PM   #4
Pano is offline Pano  United States
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Speaker diameter measurement
And if the driver manufacturer gives you the Sd, you can figure it out from there.
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Old 14th November 2017, 07:05 PM   #5
diy1995 is offline diy1995
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Hello,
thank you all for help. The anwser I was looking for was from 1/2 of the surround to 1/2 surround.
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