3 12''s or 2 15''s?

[1baller 10+ year member]

im looking for alot of bass something loud i was wondering would 3 of these be louder than 2 15''s

http://cgi.ebay.com/MA-AUDIO-HK12X2-12-COMPETITION-SUBWOOFER-NEW-CAR-SUB_W0QQitemZ300141454841QQihZ020QQcategoryZ18803QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

or 2 15''s

http://cgi.ebay.com/New-MA-Audio-15-Inch-4000-Watt-Sub-Hard-Kore-HK15X2-NR_W0QQitemZ110158911162QQihZ001QQcategoryZ18804QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Click to read more...

 

[Atimm693 10+ year member]

Three 12s may have more area than 2 15s in cone area. So in theory they would be louder, if they are in the same box with the same power per woofer etc.

What amp are you powering these with? Also know that you're gonna have a funny ohmage with 3 subs.

Ive heard those subs get quite loud but they dont have very good sq.

 

[jeremiah 10+ year member]

but is int it four 12's are = to two 15's so two 15's >> three 12's

 

[Atimm693 10+ year member]

It all depends on the woofers, some have more cone area than others(two 12inch woofers arent going to have the same cone area, the surround and duscap are also different on drivers).

But since Ma is too much of a little school girl i cant find the T/S params to multiply the area and find out. //content.invisioncic.com/y282845/emoticons/mad.gif.c18f003ab0ef8a0d9c27ca78d77a6392.gif

 

[SeanDub 10+ year member]

Exact cone area depends on the rest of the woofer's geometery, but...

Circumference = pi x radius^2

3 12s = 6 x 6 x pi x 3 = 339.12 sq in of circumference

2 15s = 7.5 x 7.5 x pi x 2 = 353.25 sq in of circumference

Circumference is a pretty good estimate. So in cone area, generally 2 15s > 3 12s, especially if they are the same sub.

 

[jfsh90 10+ year member]

I don't know about 3 12s "pwning" 2 15s in cone area...

 

[jfsh90 10+ year member]

It all depends on the woofers, some have more cone area than the others.

Um... what?

Sig'd

 

[SeanDub 10+ year member]

Three 12s are going to pwn 2 15s in cone area.

Nope

 

[Atimm693 10+ year member]

Um... what?
Sig'd

I meant because every woofer has a different cone size(12 inch woofer may have 11 inches of cone vs. 11.5 on a different woofer), different surround size, etc.

No woofer is really exactly the same.

And also edited above posts to prevent further confusion.

 

[Adrian15XXX 10+ year member]

but is int it four 12's are = to two 15's so two 15's >> three 12's

X2

 

[audioholic 5,000+ posts]

Three 12" circles is slightly less area than two 15's, but approx the same. So unless you are comparing different brands/models with grossly different surround types/sizes, neither is gonna 'pwn' the other in cone area.

Id just go with the two 15's, its cheaper, and generally easier/more efficient to power than an odd number of subs.

 

[dbhittin 5,000+ posts]

im doing 4 12's this time, 3 was weak

 

[dbhittin 5,000+ posts]

is 7intern cubes to small for 4 12"s by the way?

 

[SeanDub 10+ year member]

Generally people do 2 cubes net for a single 12, so 8 is good, but 7 may not be bad.