designing a sub woofer box

[k12ug 10+ year member]

so when in the process of designing a sub woofer box, the sub calls for a random space requirement, i have heard the bigger the better, but is there a point where the box is to big, and if and how do you find the ,"sweet spot" on how much volume to use when building a sub woofer?

take for instance.

a FI BTL 18"

the specs says:

5-8cuft for a ported box

would it be found with the combination for tuning you have the box for?

this is a double post, im at home trying to figure this out..and now one would look at it were i put it....so im posting it here, sorry for the double post, just trying to figure some stuff out. and im stuck on this.

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[nauc 10+ year member]

id go to the official Fi forum

http://www.soundsolutionsaudio.com/forum/index.php?showforum=51

 

[k12ug 10+ year member]

id go to the official Fi forum
http://www.soundsolutionsaudio.com/forum/index.php?showforum=51

this is not a specific question....im asking in general....im just using FI because i had it in mind.

i want to know what i would have to do for any sub.

thanks!

 

[germanyt 10+ year member]

My guess is that companies such as Fi get those recommendations based off of the Vas of the driver. The range is simply what will work best in different applications. I'm not sure if the compliance changes when the vehicle size changes. If so then that would certainly explain such a large range like 5 - 8 cubes. Fi is a company geared towards people who know what they are doing and are able to do the correcet calculations based on T/S parameters to design the proper enclosure. Other companies like MTX, JL, Alpine are geared toward the general idiot and don't give so much room to work with. Generally they stamp an enclosure size on the box and that is what they expect you to use regardless of the vehicle. I'm sure if you searched some you would find different formulas that can be used to determine the perfect enclosure for any driver. I'm not sure if my reply helped you any but I do know that once you get so big you may as well just be IB. I usually just check the forums and see what other people are running the same speaker in. I like ROE as well since you can acually see the sub perfom with different music in enclosures of different sizes and tuning.

 

[k12ug 10+ year member]

My guess is that companies such as Fi get those recommendations based off of the Vas of the driver. The range is simply what will work best in different applications. I'm not sure if the compliance changes when the vehicle size changes. If so then that would certainly explain such a large range like 5 - 8 cubes. Fi is a company geared towards people who know what they are doing and are able to do the correcet calculations based on T/S parameters to design the proper enclosure. Other companies like MTX, JL, Alpine are geared toward the general idiot and don't give so much room to work with. Generally they stamp an enclosure size on the box and that is what they expect you to use regardless of the vehicle. I'm sure if you searched some you would find different formulas that can be used to determine the perfect enclosure for any driver. I'm not sure if my reply helped you any but I do know that once you get so big you may as well just be IB. I usually just check the forums and see what other people are running the same speaker in. I like ROE as well since you can acually see the sub perfom with different music in enclosures of different sizes and tuning.

thanks man, yea..that did help me out alot.