volume is to measure all 3 dimensions and subtract the thickness of the wood multiplied by 2 (for each side). Then multiple the 3 dimensions together and divide by 1728.
Example: box is 18x14x26 and wood is 3/4" thick. 18 - 1.5 = 16.5 : 14-1.5 = 12.5 : 26 - 1.5 = 24.5
16.5x12.5x24.5 = 5053 div ide that 1728 and you have 2.92 ft^3
I don't know the forumla for tuning.
- Thread Starter
- #3
cool i just figured out my box is 7.55 cu ft, i got 2 12" L7's, now i just need the tuning formula, oh and if it involves finding port displacement or sub displacement, i dont know how to do that, so can someone explain that as well. thanks //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
Badfastbusa
10+ year member
Wheelie addict!!!
i believe what ever the sub displacement is you just subtract that for each sub from the calculated volume. im also trying to figure out this whole port thing.
helotaxi
5,000+ posts
Kilroy was Here
The formula is on JL audio's website under tutorials. Or you can just download one of the myriad free box calc programs and let it crunch the numbers for you.
Badfastbusa
10+ year member
Wheelie addict!!!
got a link for that box calculator?
helotaxi
5,000+ posts
Kilroy was Here
acreature
10+ year member
Mach1smo
How accurate is this compared to paper and pencil?
http://www.subwoofertools.com/forum/ported-box.asp
http://www.subwoofertools.com/forum/ported-box.asp
helotaxi
5,000+ posts
Kilroy was Here
All it does is keep you from using a pocket calculator. It uses the same formula and should end up at the same answer.
acreature
10+ year member
Mach1smo
Are you answering my inquiry above your post?
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