Wanna make a ported box..

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04-09-2007, 04:46 AM

lexus

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Wanna make a ported box..

Is there some kind of guide i can follow to make a ported box. i have a MTX thunder 6000 12" 600watt woofer and all i am lookin for is SPL, i know the basics i have built stuff with medite before but i want to know about sizes and so own. Any info appreciated.

Cheers Elliott

Last edited by lexus; 04-13-2007 at 01:11 AM.

04-10-2007, 09:31 AM

Mach 5

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Hi Elliot,

Box design is largely dependant on the parameters of the driver you are using. What is the model of the MTX? Do you have any T/S specs for it?

A person can take a wild guess and chose a box size in hopes of coming fairly close to optimum, but its best if you do it once and do it by the book.

Best,
Mark

04-10-2007, 09:47 AM

Mach 5

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Ok, so I read your post again and realized you gave the model number. The T/S specs on this unit (I assume it's the 4 Ohm version) strongly suggests it be put in a sealed box. Going ported may cause the driver to unload prematurely and damage it.

But if its SPL and ported you want, then based on the specs I would build a 3.5 cu. ft. box and tune it to ~34Hz. This config will give you a massive peak of 6db at ~45Hz - just what the doctor ordered.

Don't expect it to sound good tho..

04-10-2007, 05:08 PM

lexus

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how do i got about tuning the box to the hertz you specified?

04-11-2007, 06:57 AM

Mach 5

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You can use the online tool at this link. It will calculate everything for you:

Free Ported Subwoofer Plans brought to you by SubwooferTools.com [insert slogan here]

04-13-2007, 12:09 AM

lexus

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The program you suggested i use doesnt seem to work, if your change the subwoofer size and ask it to calculate it shows a page with some funny numbers, anyone know of a link to a simaler page ?

04-13-2007, 07:00 AM

Mach 5

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It does have its bugs from time to time. I find if you hit refresh/reload it corrects itself.

Here's another on-line designer from RE:

RE Enclosure Calculator

04-13-2007, 09:21 AM

df.dima

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Speaker Enclosure Volume Calculator
there are various flash applets that will help you with tuning.

04-18-2007, 12:01 AM

lexus

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MACH 5... i used your link to make a box tuned to 34hz but due to space restraints in the car i can only make it 2.3 cubic feet, is this going to seriouly comprimise the sound, as fair as quantity?