View Full Version : port help please

04-09-2003, 11:25 AM
I need help figuring out that size of my port.
the box- 4.0
the port tunning- around 33 hz
the subs- 2 DD 3512

thank you


04-09-2003, 04:06 PM
What are the dimensions of the box?
Do you want to use a slot port? round port?
Do you want to use 1 or 2 ports?
What are the T/S Parameters for the subwoofer?

This info will help us help you.

04-09-2003, 05:35 PM
1 slot port
tuning around 33 hz
in side dimensions-

h- 17.5
w- 35
bottom depth- 20
top depth- 5.5

and the subs are 2 DD 3512b
Vas-40 L

will be powered by one RF bd1500.1 running at 2 ohms, the car is a 94 VW golf 4 door

i hope i didn't leave something out, if so, let me kno
i wanted to run the port vertically down the middle between the two drivers but because the top depth is so small, i dont think i can, so it will have to be running hoziontally on the bottom..


04-09-2003, 08:50 PM
So you have a wedge shaped box.

Are your speakers on the flat side or the angled
side of the box?

How much clearance is there between the back of
the box and the back of the subwoofer?

Are those dimensions internal or external?

What is the Xmax for the sub?

Is your box shaped like this box pictured?

04-09-2003, 09:52 PM
the dimensions are internal and the box almost looks like that, except for the fact that i have angle both in front and back, the biggest angle being in the back between 30-35 and around 10-15 in the front. the xmax of the subs is 17mm. the subs mounting depth is 6.5 inches...


04-09-2003, 11:19 PM
Well I'm not to sure how to figure out a slot port for your
box design. I would be glad to help but I don't want to
screw up your box.

I'm sure someone else here will be able to help
you out with porting your box.

04-09-2003, 11:21 PM
i just need port length...
i was thinking of a 2x13 but thought that was t0o small, so how about 3x15....or n e thing not exceeding 4x18...


04-10-2003, 01:13 PM
13 x 2 slot port @ 11" long

15 x 3 slot port @ 21" long

18 x 4 slot port @ 35.5" long

for 33Hz tuning