possible n00b question

[PV Audio 5,000+ posts]

i dunno if this has already been asked, but how do you calculate the surface area of a subwoofer cone? i've always wondered it and u can compare potential output if u kno the displacement of the cones. so what it be?

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[Rawr-DQ 10+ year member]

The manufacture usually has that information somewhere...as for calculating it, there is probaly a formula online somewhere, never had that problem though.

 

[PV Audio 5,000+ posts]

yes i could care less what the manufacturer says, i just want to know how to do it.

 

[kuijo 10+ year member]

i'm sure Лr² will get you pretty close

 

[PV Audio 5,000+ posts]

i'm sure Лr² will get you pretty close

oh yeah definitely since all subs have flat cones //content.invisioncic.com/y282845/emoticons/uhoh.gif.c07307dd22ee7e63e22fc8e9c614d1fd.gif pi r ^2 would be the same for every 10" sub

 

[Acidburn 5,000+ posts]

LOL, use pi x r^2, it'll be close enough

 

[Rawr-DQ 10+ year member]

Hes really *****y //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[kuijo 10+ year member]

Whoa there, i was just kidding. I guess i should have put pretty close in quotes.

 

[PV Audio 5,000+ posts]

Pi*(Radius - 0.5*Surround_Width)^2
Also note that it's not completely accurate ... Use Sd if possible ...

thats closer than the area of a 10'' circle, thanks

 

[PV Audio 5,000+ posts]

It could also be written as ...
Pi*[(Diameter - Surround_Width)/2]^2

yeah i gotcha. how would u factor in the dustcap though (if it has one)?

 

[PV Audio 5,000+ posts]

You don't ...
Remember, it's inner diameter (or outer diameter ... you measure from the outside of the surround to the outside of the surround)

i'm not quite sure i understand what u mean. protrusions add more surface area (think the fins on a heat sink), so why wouldn't the dustcap add to it?

 

[PV Audio 5,000+ posts]

11 o'clock bump