surface area

[BTP]

Hello, I saw someone posted a question wondering how 2 15" subs could have more cone area than 3 12" subs. Here's the answer. Area= pie (3.14)*radius^2 So, 2*15=30 and 3*12=36 is incorrect formula

3.14*®7.5^2= 176.625 *2= 353.25 for Area for 2 15"s

3.14*®6^2= 113.04 *3=339.12 for Area for 3 12"s

The difference is only 14.13, so this amount of surface area isn't much. Depending upon power and SPL rating of the speakers, I don't think you could say one is better than the other. It's personal taste in sound.

BTP

Click to read more...

 

[acold7dusta 10+ year member]

kewl.

 

[j3bus2k3 5,000+ posts]

Technically, wouldn't you need to use the specific woofer's Sd rather than the vague 6"or 7.5" radius? I understand the point your making, just being literal

 

[maldecido33 10+ year member]

yea.... ur wrong.

you use the Sd of the woofer, not pi*r^2