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Old 04-04-08, 01:52 PM   #34 (Link)
 
mike c
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Re: Please help me design a PR subwoofer

found this:
http://answers.yahoo.com/question/in...2113651AAYB8gZ

all i need now is the effective diameter of the PR or to solve this:
R = (Sd/PI)^0.5

Sd is .110m^2

im kinda rusty with raising by half exponent, how does that work?
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