So i am trying to build a box for my DD3512 and i and trying to follow there parameters on the box but i am having a hard time cuz this is the first time i have built a ported box.
I have been playign with some numbers and have a few designs but i was wonderign what the proper frequiences for good SQ would be?

 

2.25 cubes after all displacements @ ~29-33hz

 

good SQ as per...Iasca rules, my personal taste, Jalat's or your's?

 

in general

 

Jalat's looks good..i'd say anywhere from 2-3 cubes and tuned between 25-35 hz depending on the rest of the system as Defro mentioned. When I want to be sure, i set up my mids, tweets and everything else as much as possible. I then build a larger than required box, and use 6" pvc tube as my port. With the aid of winisd I then adjust volume adding blocks to reduce it, and adjust the tuning by adjusting the length of the pipe...until I get exactly the sound I want...then I build the enclosure for the car...and start micro tuning!

 

There is no such thing as an SQ ported box,only sealed J/k....Dukk insert coment here>