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How do you keep slot ported from having port noise??

 

Silver Member
Username: Pike110

12w6v2s, Indianapolis...

Post Number: 244
Registered: Oct-05
How do you "flare" a slot ported box to keep it from having port noise? Also, does anyone know where you can buy box carpet that isn't the standard black or grey? Maybe some with graffix on it or just something different?
 

Gold Member
Username: 54danny54

Betsy layne, Kentucky..GO... \blink, red,...

Post Number: 2903
Registered: Nov-04
did u use the www.subwoofertools.com subwoofer box calc? if so it should have gave u enough port area to cut out port noise.
 

Gold Member
Username: Rovin

Trinidad & T...

Post Number: 9796
Registered: Jul-05
..ya - i thought slotported boxes were designed 2 never have any port noise ,never heard any in of my slot boxes so far ...
 

Silver Member
Username: Pike110

12w6v2s, Indianapolis...

Post Number: 246
Registered: Oct-05
Mat Dope gave me a box design that I am going to use. I had another thread earlier that was titled "Can someone help" This is the first ported box that I have ever made so I was just making sure I wouldn't get any port noise.
 

Gold Member
Username: Rovin

Trinidad & T...

Post Number: 9797
Registered: Jul-05
try it out & live a little on the edge man ......
 

Gold Member
Username: Frkkevin

Resonant Engineering..., Fort Worth... Email

Post Number: 1685
Registered: Nov-05
use a router to round the edge of the port.. also you can use quarter roud of something similar for the corner
 

Gold Member
Username: Southernrebel

Monroe, Louisiana DD 9515d~~]...

Post Number: 3827
Registered: Mar-04
round all edges of the port and make sure you have at least 12sq inches of port per cuft.

~16sqinches per cuft will do better.
 

Gold Member
Username: Rovin

Trinidad & T...

Post Number: 9798
Registered: Jul-05
good advice from mr. "canaan".......
 

Silver Member
Username: Pike110

12w6v2s, Indianapolis...

Post Number: 248
Registered: Oct-05
Its been awhile since college. To get the sq inches of the port is width x height or width x length. Sorry for the stupid question. measurments of the port is 4" width x 12.5" tall x 14.75" length. It is a 2 cube box. Does this sound right? Its for 2 12" assassins.
 

Gold Member
Username: Southernrebel

Monroe, Louisiana DD 9515d~~]...

Post Number: 3831
Registered: Mar-04
do you mean the box is 4cuft? (2cuft per sub)

u measure the opening the port creates...
4" x 12.5" = 50sq inches

50sq inch / 4cuft = 12.5sqin/cuft


That box doesnt sound right though...4cuft w/ 50sq in port 14.75" long would tune to ~40hz. I would tune those 12's to ~35hz for daily.
 

Silver Member
Username: Pike110

12w6v2s, Indianapolis...

Post Number: 249
Registered: Oct-05
Here is the box that I got from Mat. Does this look right to you? The AA website says 2cf and tuned to 32hz for the assassins.




application/pdfUpload
Assassin12dualportedboxplans.pdf (40.5 k)
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