View Full Version : Questions about port design.

02-01-2014, 06:46 PM
So I am in the process of designing a ported box for 2 jl audio 10w3v3-4 subs. They will be placed under the back seat of a Chevy crew cab and I will be lifting the seat 3 inches.

I am splitting the enclosure into two parts it just makes it much easier to design. It is a wedge style box but laid on its side. My dimensions are as follows: width 20"xdepth 18.75x front height 12.88"x back height 6.88" giving me a gross volume of 1.54ft3.

I am going to use a square slot port either oriented on the front or the side of the box. It measures 3.76x3.76x26.52" giving me a tune of 32hz. After all displacement the enclosure comes out to 1.25ft3 tuned to 32hz.

My question(a) are; does making the port square present any problems?
I am obviously going to have to bend the port is this going to present any problems.
I am using subwoofer design toolbox which doesn't calculate port noise or port area I used the car stereo calculator and it came out to 12.56 sq in port area I'm just wondering is someone with winisd could be so kind as to do this for me. Thank you all for the help.

02-01-2014, 07:02 PM
It just dawned on me that my port will share to walls with the enclosure decreasing the length of the port this throwing off my net ft3. I'm sure it will come up to for some reason my computer will not let me download winisd probably cause it is one step up from an abycuss.

02-02-2014, 12:08 AM

02-02-2014, 10:26 AM
What is the displacement on one of those woofers?
And your building 2 of these boxes (one for each woofer) or thats the dimensions for 'both' woofers?

02-02-2014, 06:11 PM
Displacement is .05ft3 and it's gonna be one sub per enclosure.

02-02-2014, 10:35 PM
Square port would be fine, and those dimensions would tune you to just under 32hz (with the woofer seeing about 1.28 cu. Ft. after all the displacements).

02-03-2014, 03:21 PM
Awesome! Thank you so much for your help.

02-03-2014, 05:41 PM
No prob.
Report back with the results