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View Full Version : Hey Box Designers!!!!!!

schackel
05-08-2009, 01:19 AM
hey i am wondering what kind of formula u use to figure out tuning?
i know it has to do with port area and overall box volume i am just wondering how you calculate?

Cloak559
05-08-2009, 01:35 AM
Fb - is the tuning frequency of your enclosure in Hertz.
Lv - is the length of your port in inches.
Vb - is the internal volume of your enclosure in cubic inches. To convert cubic feet to cubic inches, multiply by 1728.

If you want to use multiple ports, divide your enclosure volume by the number of ports you want to use, then use the result of this calculation as your Vb in the formula below to find out how long each port should be (a tip from JL Audio™).

http://www.carstereo.com/Images/LVFormul.gif

Vent Length Formula
If you want to calculate square vents, the formula below will give you the value of R to use in the formula above.

http://www.carstereo.com/Images/SqConvrt.gif

Conversion Formula
In the formula above, a is the area of your square vent (height x width), and http://www.carstereo.com/Images/Pi.gif (Pi) is approximately 3.141592.

It'll make your brain werk... ;)

schackel
05-08-2009, 01:40 AM
sick bro thanks alot! will be using this soon to build my wall!!!!

Pioneer~Saturn
05-08-2009, 01:43 AM

-Take the port area and find it's square-root

-Then multiply that by .823

-Add the port's length onto that

-Multiply this by the enclosures net cubic inches

Now highlight and copy this number, or write it down/save it (if youre using the comp's calculator it's easier this way)

-Now take 184,000,000 multiplied by the port area

-Devide by that number you hopefully copied in the steps above

-Find the square root of this number

-Mulitply by .159

The number you have now is the tuning frequency :) :cool: knock yourself out :)

Cloak559
05-08-2009, 01:46 AM
No Problem bro. But have fun designing a box with formulas alone. I would try to find someone on here with a copy of Bass Box Pro to just help you out a little, save you a lot of headache...PM me when you get ready to build, i can hook you up if I have the time...

Pioneer~Saturn
05-08-2009, 01:47 AM
It's pretty quick and simple once you get it down-pat

Lakota
05-08-2009, 03:47 AM
I use very little math:) All you need is skillzzzzzzzzzz

dappa5
05-08-2009, 06:46 AM
hey lakota (BANGIN' ON A BUDGET) I'll say, 151's with no subs lol thats outstanding
love the box type too (a MDF one) mines made from tapioca pudding
I think I'll try MDFnext
just playin
go cards!

schackel
05-08-2009, 10:52 AM
I use very little math:) All you need is skillzzzzzzzzzz

**** i wish i were you......your so cool!

rickymac21
05-08-2009, 11:25 AM
thought you couldnt do a big system with your dads car??? lol yet your doing a wall? haha. but whatever works. maybe im missing somthing.. but, good luck with the build. i plan on walling off my car too ! :)

schackel
05-14-2009, 12:03 PM
thought you couldnt do a big system with your dads car??? lol yet your doing a wall? haha. but whatever works. maybe im missing somthing.. but, good luck with the build. i plan on walling off my car too ! :)

hahah i am doing a build in this car me and my buddies went in together for!!!!! YAY!!

troy_audi0
12-16-2009, 11:34 AM
well snap!..
i didnt know we are doing a wall.. :)
should be sick though..
i was thinking like this but with the XXX
Batt and amps like so..
http://image.caraudiomag.com/f/9794589/caep_0803_16_z+two_fi_q_subwoofers+interior_view.j pg
http://image.caraudiomag.com/f/9794592/caep_0803_17_z+2006_chyrsler_300_srt8_trunk+rear_v iew.jpg

schackel
12-16-2009, 11:48 AM
well snap!..
i didnt know we are doing a wall.. :)
should be sick though..
i was thinking like this but with the XXX
Batt and amps like so..
http://image.caraudiomag.com/f/9794589/caep_0803_16_z+two_fi_q_subwoofers+interior_view.j pg
http://image.caraudiomag.com/f/9794592/caep_0803_17_z+2006_chyrsler_300_srt8_trunk+rear_v iew.jpg

thats dope as ****!

troy_audi0
12-16-2009, 07:15 PM
What did you think I was going to do a miss matched port
and paint it like a rosta box? I gotz styles brah