Cone area

[Bobby322 10+ year member]

I searched for an old thread that had this stuff listed out but can't find it. Going on basics, what is the equal of "x" number of smaller subs to a single bigger "x" sub...as in

2 8" = 2 12"

2 10" = 15"

(just example)

I want to go from my single 15" to some smaller subs like 8" or 10" and I want to have more overall cone area than my single 15" had. Im just not sure how many 8"s or 10"s or w/e I need.

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[soundstreamer 10+ year member]

4x 8" or 3x 10" will be more cone are than a single 15" sub.

 

[basscort2009 5,000+ posts]

1 8 = 50.24 sq in

1 10 = 78.5 sq in..

1 12 = 113.04 sq in.

1 15 = 176.625 sq in

so..

3 8s beats a 12

3 10s beat a 15

2 12s beat a 15

these are all about, not exact on the comparison.

 

[Bobby322 10+ year member]

It will be more or equal to a 15''?

edit- thanks heath

I thought there was more to it than basic highschool geometry

 

[JimJ 5,000+ posts]

Pi*radius squared?

 

[basscort2009 5,000+ posts]

edit. it will take about 3 8s to 1 15

 

[Bobby322 10+ year member]

Im probally going to go with the 10''s unless I can find a bundle of 8''s on here easily.

 

[basscort2009 5,000+ posts]

team southern bass has l7 8s for cheap. hit him up. like 6 of them

 

[spencer321 10+ year member]

1 8 = 50.24 sq in1 10 = 78.5 sq in..

1 12 = 113.04 sq in.

1 15 = 176.625 sq in

so..

3 8s beats a 12

3 10s beat a 15

2 12s beat a 15

these are all about, not exact on the comparison.

this is wrong, that would be under the assumption that the subwoofer actually had a piston diameter that was equal to the outside of the surround, not the inside.

the number the OP is looking for when the term "cone-area" is used is effective piston area, basically its how much of the sub is actually moving air. However, 85% of the people on here go by the method previously mentioned which is WRONG

some average values would be

8" = 195cm^2

10" = 310cm^2

12" = 480cm^2

15" = 810cm^2

so, 4-8's or 3-10's will be as close as your going to get. 3 8's would only be 72% of 1-15 where 4-8's would be 96% of 1-15, 3-10's would be 114% of 1-15

 

[basscort2009 5,000+ posts]

this is wrong, that would be under the assumption that the subwoofer actually had a piston diameter that was equal to the outside of the surround, not the inside.
the number the OP is looking for when the term "cone-area" is used is effective piston area, basically its how much of the sub is actually moving air. However, 85% of the people on here go by the method previously mentioned which is WRONG

some average values would be

8" = 195cm^2

10" = 310cm^2

12" = 480cm^2

15" = 810cm^2

so, 4-8's or 3-10's will be as close as your going to get. 3 8's would only be 72% of 1-15 where 4-8's would be 96% of 1-15, 3-10's would be 114% of 1-15

yea pretty sure i said ABOUT NOT EXACT.

 

[80INCHES 5,000+ posts]

IN the right setup 3 10's can get REALLY loud

but u also have to get 10's that kan take some power

80

 

[basscort2009 5,000+ posts]

like dc level 5s lol ask thorshammer. hell even one ten off about 2500 rms would do mid 40s or so.

 

[80INCHES 5,000+ posts]

exactly...3 dc level 5 10's with 3k goin to each in 4.5 cubes tuned to 32hz with a 100 square inch port..will be very very very very loud

 

[80INCHES 5,000+ posts]

exactly...3 dc level 5 10's with 3k goin to each in 4.5 cubes tuned to 32hz with a 100 square inch port..will be very very very very loud

 

[michaellane 5,000+ posts]

i run four 10's //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

2000+rms

in a accord //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif