two 15's or four 12's?

[Buck 5,000+ posts]

4 12's for sure. More cone area. No brainer.

 

[mazdakid 5,000+ posts]

Im not sure how any of you guys are coming up with your cone area numbers?

 

[IonRL205 10+ year member]

48 > 30

 

[RAM_Designs 5,000+ posts]

Do something like this, dual kerfed ports look great IMO.

 

[wickedwitt 10+ year member]

I didn't know you were building such a tiny box. Do 2 15s, not my original recommendation of 4 12s unless you grow some and build them a proper enclosure.

 

[wickedwitt 10+ year member]

Area of a circle: Radius*Radius*Pie aka 'Pie' 'R' squared

Do that * the number of woofers. If they are square like mine, just do cone size times itself, much easier. Seriously guys.

4 12s= 6*6*pie=113.097...*4= 452.389...

2 15s= 7.5*7.5*pie=176.714...*2= 353.429...

 

[T.I.K. 10+ year member]

I didn't know you were building such a tiny box. Do 2 15s, not my original recommendation of 4 12s unless you grow some and build them a proper enclosure.

Where did I say I wasn't gonna give them a proper box? I said either way I go the box is gonna be around 8-10 cubes..

Area of a circle: Radius*Radius*Pie aka 'Pie' 'R' squaredDo that * the number of woofers. If they are square like mine, just do cone size times itself, much easier. Seriously guys.

4 12s= 6*6*pie=113.097...*4= 452.389...

2 15s= 7.5*7.5*pie=176.714...*2= 353.429...

I got mine the same way, except I subtracted two inches for the surround.

 

[T.I.K. 10+ year member]

Do something like this, dual kerfed ports look great IMO.

Probably would do something like that, except with aero's on the front.

 

[wickedwitt 10+ year member]

Where did I say I wasn't gonna give them a proper box? I said either way I go the box is gonna be around 8-10 cubes..

I got mine the same way, except I subtracted two inches for the surround.

10 cubes on 4 12s isn't proper. I have 12 cubes on 2

 

[T.I.K. 10+ year member]

10 cubes on 4 12s isn't proper. I have 12 cubes on 2

So should I wall my SUV off for all four 12's, since they need 6 cubes each?

 

[wickedwitt 10+ year member]

So should I wall my SUV off for all four 12's, since they need 6 cubes each?

Sure, why not.

 

[T.I.K. 10+ year member]

Alrighty then, gimme a few days to draw up this box design.

 

[mazdakid 5,000+ posts]

I know how to calculate cone area, just everyone had different numbers.

You have enough room for 4 12s or 2 15s, you dont need 6 cubes for a 12.

 

[RAM_Designs 5,000+ posts]

So should I wall my SUV off for all four 12's, since they need 6 cubes each?

The OA12's don't need 6ft^3 each...in a ported alignment, no 12" sub "needs" 6ft^3 to function properly.

 

[RAM_Designs 5,000+ posts]

I know how to calculate cone area, just everyone had different numbers.

Take the sd that's given in cm^2 and divide that by 6.45 to get the number in in^2, since there's 6.45cm in a square inch.