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View Full Version : How do i port a box?



sethcal
11-07-2002, 06:11 PM
hello, i have a box that is 17" long 20" high, and 12" wide. i have never ported a box before, do i need a tub? cause in the manual my sub came with it said for a 2.5 in tube that is 13 in. long. but the boxes that i have seen that have been ported have a slot at the bottom of the box. but if i have a slot, does there just need to be a hole or some more wood in there? thanx for anything you can give me. thanx
-seth-

ramos
11-08-2002, 09:35 AM
You can do it either way. But the easiest way is to use pvc pipe. Just go to your local home center/ hardware store. And buy you a 13" piece of 2.5" pvc. Take a file or some coarse sand paper and round off the edges of the pipe. It wll help cut down port noise. Then cut your hole a 1/16th of an inch larger than your pipe. Then silicon your port in place. :)

sethcal
11-08-2002, 11:16 AM
ok man thanx! but will that sound the best? thanx

ramos
11-08-2002, 12:25 PM
Originally posted by sethcal
ok man thanx! but will that sound the best? thanx

As opposed to what ? best is a matter of taste. Porting it will make it louder, but at the expense of some of the frequency response. What kind of sub(s) do ya have ? I can run the numbers and see what kind of response you can expect. :)

sethcal
11-08-2002, 01:20 PM
i have 2 10" audiobahn ultra excursion subs. but will pvc sound better then a slot? thanx
-seth-

Corsica
11-08-2002, 02:09 PM
Originally posted by sethcal
i have 2 10" audiobahn ultra excursion subs. but will pvc sound better then a slot? thanx
-seth-

Actually Ramos PVC vs. carboard wouldn't cardboard work better? And I may try PVC soon.


J

ramos
11-08-2002, 02:16 PM
The more rigid the better. Just be sure what ever you use, to round off the edges.

Corsica
11-08-2002, 02:19 PM
So If i change the tube from cardboard to PVC I will hit harder??



J

MikeofTulsa
11-08-2002, 02:32 PM
good chance.....im thinking about possibly porting my shivas after i get them....i might just end up going w/ one shiva and a jbl 300.1 .....depends on how loud they are in the sealed box....will probably sound good enough tho

ramos
11-08-2002, 03:32 PM
Originally posted by Corsica
So If i change the tube from cardboard to PVC I will hit harder??



J

it might add a 1/10th of a db. But it would be so minute you wouldn't hear it. We will talk later about making your subs hit harder. :)

Corsica
11-08-2002, 03:40 PM
Good. and BTW I am gonna stick with MA Audio subs. Nobody on these sites use them, and people In my town never heard of them.


J