PDA

View Full Version : Questions about building a ported box?



firefighter1225
09-03-2009, 10:24 AM
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!!

firefighter1225
09-03-2009, 05:17 PM
bump anyone?

nicksredline
09-03-2009, 05:24 PM
use this calculator http://reaudio.com/speaker_box/LPort_Box_Calc.html

Twisted_0912
09-03-2009, 05:25 PM
use this calculator http://reaudio.com/speaker_box/LPort_Box_Calc.html

the tuning is off on that calculator :fyi: and you have to account for sub displacement and other stuff as well. just saying

firefighter1225
09-03-2009, 06:29 PM
Thanks, but I need to use round ports (aero) not slot ports.

jake760
09-03-2009, 06:55 PM
Download winISD it will figure round port length and show you the frequency response for your sub in your new box.