Questions about building a ported box?

[firefighter1225 10+ year member]

I've got 2 12" alpine type R's in a sealed box in my trunk, and I am planning on going ported, however I want to keep the box as small as possible. The box program I have says that I can run a 1.5ft3 (per sub) with a 4" x 17.35" port tuned to 33hz with a port that is flared on both ends. First, could someone with a better program check this for me and two is a flared port the same as an Aero port, as the Aero is the port I want to go with for my set-up.

imp-4ohm dvc

sen-85

fs-29

vas-1.6ft3

qms-7.89

qes-.50

qts-.47

xmax-18.2mm

Thanks for any help!!

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[firefighter1225 10+ year member]

bump anyone?

 

[nicksredline 10+ year member]

use this calculator http://reaudio.com/speaker_box/LPort_Box_Calc.html

 

[Twisted_0912 10+ year member]

use this calculator http://reaudio.com/speaker_box/LPort_Box_Calc.html

the tuning is off on that calculator //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif and you have to account for sub displacement and other stuff as well. just saying

 

[firefighter1225 10+ year member]

Thanks, but I need to use round ports (aero) not slot ports.

 

[jake760 10+ year member]

Download winISD it will figure round port length and show you the frequency response for your sub in your new box.