Back a couple years ago I used some great info from this Forum and built a slot ported box using a program that was great. It was web based, you put in your dimensions and the sub info as well as the frequency you want it tuned to and it spit out actual plans for you.

I tried the links for this and they don't seem to work anymore, does anyone have any suggestions/links?

 

http://www.reaudio.com/speaker_box/LPort_Box_Calc.html

hope it helps.

 

Speaker Enclosure Volume Calculator

or this one

 

The REAudio one is exactly what I want but I have to give it the port width and length which I don't have...... How do I figure this out? The other one you would give it the Frequency you want it tuned to and it would figure out port width and lentgh.

I'm sure there's a way to figure it out? I want a box that's 36" wide by 17" tall and it's for a single Fusion 12" Jonah Lomu:

fjl-1211 Jonah Lomu Woofer

* Magnet Structure 300 Oz
* Power Handling 1300 Watts
* Voice Coil 3" Black Alloy SVCImpedence (per coil) 4 Ohms
* Free Space Resonance (Fs) 28Hz
* Efficiency 89db
* Frequency Response 21Hz to 1.2kHz
* Mounting Diameter (mm) 11.22"/285mm
* Mounting Depth (mm) 6.49"/165mm

 

that speaker enclosure calc is cool, will it work if im using fiberglass?

 

Volume is volume, whether you use wood, fibreglass, steel, whatever.

 

i meant if the fiberglass enclosure was rounded.

 

winisd beta for a program. round you will have to figure it out the old fashion pen and paper way.

 

The best gain from an enclosure is from a perfect sphere. No destructive internal reflections. The fewer parallel walls the better, and rounded walls have more strength than flat walls.

 

then how would I mount such a box?