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View Full Version : How to figure out sq ft of your box enclosure to make sure it matches specs



TheRealARW
08-01-2012, 04:26 AM
If you want to build your own subwoofer box, which is recommended to be honest its much easier and cheaper, but there's things you gotta know first. Depending on how many sub woofers your putting is the first thing you want to know. This also works if you don't want to make your own box and your going to just buy one pre-made you will want to make sure it matches up to the sub woofers specs.
First things first. Depending on if you buy your sub woofers brand new out of the box or used, you want to know what is the minimum/ recommended cubic feet. This is THE most important thing because this will determine how your sub outputs in performance. If your subs didn't come with a manual (used) than the best thing to do is make sure you have the size of them subs, the name of the company and everything else. For example I have JL subs and I have 12" subs and they are the W3V2(tells me on the back) and they are also 2 ohm load. (which doesn't matter I don't think) and just google it. something will pop up and tell you the specs.
Next you need to come up with measurements and see how well it'll match up to your sub woofers specifications.
For example I have a box which is 10in W x 42 in L x 14 in H and what I would do is multiply all those to get 5880, than you divide by 1728. Don't ask me why you divide by 1728 because I'm not sure why it's that number but whatever dimensions you have you will always use that number. Once you get that number than you'll divide by how many subs your putting in. I'm putting in 2 therefore I'd divide whatever number I got by 2. If its higher than your subs specifications, good. If it's below the subs cubic feet, don't expect maximum performance.
Once you got everything situated and got your measurements your ready to start making your box

frogcase2002
08-01-2012, 04:48 AM
you divide it by 1728 because thats 1 cf in inches

audiobaun
08-01-2012, 05:24 AM
L x w x h= sum,and divide by 1728,less the thickness of the box on your measurements

Bettr n' Revrse
08-01-2012, 05:38 AM
Its called math I think......

05fronty
08-01-2012, 02:05 PM
wow never knew this

SplAffair
08-01-2012, 02:07 PM
Whats this foreign language that involves numbers?

maylar
08-01-2012, 04:57 PM
Another noob attack. Great.

av83
08-01-2012, 05:03 PM
If you want to build your own subwoofer box, which is recommended to be honest its much easier and cheaper, but there's things you gotta know first. Depending on how many sub woofers your putting is the first thing you want to know. This also works if you don't want to make your own box and your going to just buy one pre-made you will want to make sure it matches up to the sub woofers specs.
First things first. Depending on if you buy your sub woofers brand new out of the box or used, you want to know what is the minimum/ recommended cubic feet. This is THE most important thing because this will determine how your sub outputs in performance. If your subs didn't come with a manual (used) than the best thing to do is make sure you have the size of them subs, the name of the company and everything else. For example I have JL subs and I have 12" subs and they are the W3V2(tells me on the back) and they are also 2 ohm load. (which doesn't matter I don't think) and just google it. something will pop up and tell you the specs.
Next you need to come up with measurements and see how well it'll match up to your sub woofers specifications.
For example I have a box which is 10in W x 42 in L x 14 in H and what I would do is multiply all those to get 5880, than you divide by 1728. Don't ask me why you divide by 1728 because I'm not sure why it's that number but whatever dimensions you have you will always use that number. Once you get that number than you'll divide by how many subs your putting in. I'm putting in 2 therefore I'd divide whatever number I got by 2. If its higher than your subs specifications, good. If it's below the subs cubic feet, don't expect maximum performance.
Once you got everything situated and got your measurements your ready to start making your box


http://cdn.lolcaption.com/wp-content/uploads/2009/11/funny-fail-pics-epic-fail-massive-train-wreck.jpg

I lol'd my butt off at the bold... But in it's entirety, it's pretty much this ^^^

05fronty
08-01-2012, 09:52 PM
lol true^

kushy_dreams
08-01-2012, 10:50 PM
what was the purpose of this thread?

OmegaBunny
08-01-2012, 10:55 PM
LOL I thought you were asking a question. It wasn't until I got to the end that I realized you were telling us how to do it.

Then I was like...

http://media.comicvine.com/uploads/9/98293/2433304-just_read_super.jpg

mazdakid
08-01-2012, 10:59 PM
what was the purpose of this thread?

Hes teaching us how to build a custom subwoofer box or how to find out what prefab box will work for our subwoofers.

OmegaBunny
08-01-2012, 10:59 PM
You forgot to tell us that we need to take external measurements, divide by 1728, then guesstimate the thickness of the wood. Also, we don't need to worry about figuring out the port area or length, just guesstimate on that as well.

but for real, who has been banned recently that wants to troll?

;)