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Discussion Starter #1 (Edited)
The listed parameters for the Arc series 10" are found below and also in the linked pdf at the end of post.

Sd is listed as "31.400m"



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http://www.arcaudio.com/product-pdf/ARC_woofer_10_12_man.pdf.pdf

Can anyone help me understand the values they list for Sd? Typically I have seen Sd measured as area of the cone. Obviously the cone is not 31.4 meters, squared or otherwise. So what do they mean when they list Sd as 31.4m? Is this just bad data that they have up on their site or am I overlooking or misunderstanding something? I've emailed them with no response so now I turn to this forum. The forum wont let me link properly because I haven't posted enough. I'll add the links in the next post if it ever lets me. edit: finally it let me link properly
 

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maybe 31.4 cm^2?
 

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Discussion Starter #3 (Edited)
minbari, 31cm^2 would be really low for a 10" sub so i dont think this is it. There are other listed specs on that sheet that also dont make a lot of sense to me. Kxm, Exm, for example.
 

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Lol, isn't that 10 times pi?
 
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