convert round port to slot port

[audio-pro714 10+ year member]

I was hoping someone could tell me what size slot port I would need ? The manufacturer recommends 2) 4" x 13.75" ports my box will be 2.5 cubes and 18" H? Any help would be deeply appreciated!

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[John Pionke 10+ year member]

You need to match the area. To find the area of a circle, you use the formula pi*r^2. r=radius (half the diameter of the circle). There are online calculators if you need some help.

Once you have the area of the circle, you just create a slot that matches that area and keep the length the same. Ex. Area of tube port(s) is 36". Your box is 18" tall. 36/18=2. Your slot port will be 2" x 18".

 

[Phoenix Risen 10+ year member]

I was hoping someone could tell me what size slot port I would need ? The manufacturer recommends 2) 4" x 13.75" ports my box will be 2.5 cubes and 18" H? Any help would be deeply appreciated!

you will want to shoot for around 25in^2 of port area, the dimensions of the side that your putting it ton will determine the length and width

 

[Kangaroux 5,000+ posts]

you will want to shoot for around 25in^2 of port area, the dimensions of the side that your putting it ton will determine the length and width

i would say 32 sq. in. to be on the safe side.

 

[bubbagumper6 5,000+ posts]

You need to match the area. To find the area of a circle, you use the formula pi*r^2. r=radius (half the diameter of the circle). There are online calculators if you need some help.
Once you have the area of the circle, you just create a slot that matches that area and keep the length the same. Ex. Area of tube port(s) is 36". Your box is 18" tall. 36/18=2. Your slot port will be 2" x 18".

Actually generally round ports offer less turbulence therefor you can get away with less port area. Slot ports need more.

 

[Phoenix Risen 10+ year member]

i would say 32 sq. in. to be on the safe side.

true, wasnt thinking about going to slot port.

 

[RAM_Designs 5,000+ posts]

And even if you made a single slot port with the same area, it wouldn't have to be as long to get the same tuning. Dual ports need more length than a single port to get the same tuning, even though port area may be the same.

 

[audio-pro714 10+ year member]

thx guys I think I got it now? I'm old school and have always run round ports just wanted to try slot ported!