hey, i am sure there was some kind of post on this, but i really didn't want to look it up, and i should probably know this, but i must have skipped math that day. i have a jbl 12" that needs 1.25 cubic feet of air space, and i want to see how i figure out what size box i need. i have one now, and i think it is WAY too big and bulky. I want something more sleek, but i want it to be functional too. let me know if anyone has some insight. thanks.

 

Here's a link for ya.

 

or you can just use the equation: base x width x height. use the inside dimensions though. also, make sure you make the proper conversion from inches and feet. for example, if your measuring in inches, convert the 1.25CUft to CUin by multiplying by 12 three times. or 1.25x12x12x12. then make all the measurements for the box in inches and multiply you width base and height to find your volume. it is very easy.

 

[sidebar] Do you have to subtract the volume of the sub that sits inside the box aswell? [/sidebar]

 

no. the volume that the spec sheets have will account for the sub displacement. you may want to check your sub spec sheet and be sure, but every sub i have built boxes for i didn't need to subtract the sub displacement because it was already included. this might change with some of the very large subs (with the 96+oz magnets and such, but again, check the spec sheet.

 

Also depends on your listening style of music different types of music sound better with different enclosures if you want really crisp sound for jazz or rock music the suggested size will probably work well just make sure its a sealed enclosure if your going more for high bass applications a slightly larger box may be better for you than the recomended size by the manufacturer