View Full Version : box building help for subs

03-17-2004, 05:15 AM
yo dudes, wats up,

my box dimensions are 34 Long x 16.5 W x 16 D...

I built this box off my head a long time ago & wana use it for 2 x 12in vibe subs rated at 350w rms & 700w peak power.

on the specs tho, it said use a box of 1.5cubic ft but what i wana know is how much would this box size be..
its got split chambers & i wana port it as well for the sub in each chamber..

fs in hz in 32
VAS in cubic ft=3.34
VAS in litres=84.50
Xmax in inches=0.29
Xmax in mm=7.5
max power in watts=700
Fo in hz=32
magnet weight=50
recommended sealed enclosure = 1.5 cubic feet

This is the spec of the subwoofer & its calle vibe pt120 series..

Ive seen loads of these boxes ported from the manufacturer but i would like to know if the box ive made is suitable & how big & long sholud i make the port?

Any help would be graceful as this is doing my head in

03-17-2004, 08:38 AM
Go to this web page and it will help


05-16-2004, 04:56 AM
Can someone please help with the mesearuments as im not to good at this sort of thing.
Ive built a box measuring
L =33.5in
H= 14in
Ive used a divider in the middle & have place a 4in port of 11.5in into the box.

Ive tested the box after sealing it & it sounds wicked but i know i can make the box sound deeper.
How can i do this as there is no more space for me to increase the port length?

wat about a 90 degree angle in the box to increase the length, would that be ok.

Also wat frequency do u think my box is tuned to?

It sounds very good considering i just put it all together of my head


05-16-2004, 08:19 AM
some1 gimi some replies please???

05-19-2004, 06:28 PM
thanks for the reply mate, the tuning frequency u mentioned i would say is wat my box sounds like.
dont get me wrong, the bass is deep but wat about making it sound deeper?
can i use a longer port with a 90 degree angle?
i want to get in the the region of say 25 to 35hz?

05-19-2004, 06:29 PM
oh yer, there is a port in each division, 1 4in at 11.5in long as my box is 13in deep so i couldnt go any longer?