View Full Version : help with porting a box for 4 12s

06-18-2003, 09:52 PM
i want to make a box ported for 4 12in l7s should have all 4 subs in there
own chamber or have one big comon chamber? also how many ports shold i have in this
box? heres the measurements 37in deep 35in long 16in high the subs will be mounted on top of the box
firing up i went to 12volt.com and that gave me around 9cf to work with is that right? or should i have just one big sealed box? i want some cheast pounding bass ! {p.s. i bump responsably!

06-18-2003, 11:27 PM
I would use 1 chamber and you probably need more than 9 cuft.

06-19-2003, 11:34 AM
Nine cubes should be enough....Here is my idea for your box. This is gonna be hard to picture so bear with me.

What i would do is give each sub its own enclosure....but...leave one part (top or bottom) open and make a port all along the bottom (or top) that all the subs would use. Its kind of hard to picture, so i drew up a plan. The plan is just for one section of the box, but you get the picture. The dividers between subs go to the back wall of the box, and to the top, but the port is at the bottom.

06-19-2003, 12:23 PM
wow.. i like that design a lot.. good work.. yeah.. maybe a tad more then 9 though.. :confused:

06-19-2003, 12:34 PM
3.25 is straight off of here http://kicker.com/ShowPage.cfm?filename=l7solosub.html&menu=SUBWOOFERS . and you would still want to go bigger than that.

06-19-2003, 02:08 PM
There is only one flaw i see in my design, and that is getting the port tuning correct...

06-19-2003, 02:35 PM
u defenly want to make 4 chamber porting each chamber

some think like that i have this box working know it is the way to go mate