How do you calculate port displacement?
How do you calculate port displacement?
To determine the displaced volume of the port, we simply multiply the cross-sectional area by the internal length of the port (which we have already determined as 12” in this example.) Displaced Volume = 9.61625 X 12 = 115.395 cu.in.
How big should a port be in a sub box?
the narrower you go the more it will act like a big sealed box. and for the length, go from 18 to 23 inches on up. the longer the lower.
How do you calculate subwoofer displacement?
If the displacement specs for your sub is in cubic inches, it’s an easy conversion. Just divide the number of cubic inches by 1728….The displacement of a subwoofer is the amount of air space the subwoofer itself takes up.
| Model | Displacement (cubic Feet).06 |
|---|---|
| HDS2.112 | 0.07 |
| HDS2.115 | 0.11 |
| HDS3.110 | 0.07 |
| HDS3.112 | 0.09 |
How is subwoofer port calculated?
The port area is in square inches, meaning it takes height times width to calculate total area. A port 4 inches high by 4 inches wide would calculate as 4 x 4= 16 in2. In our example box, we have an inside height of 14.5 inches. To calculate the slot width, divide 54.5 sq.
Can a subwoofer port be too big?
Remember, there is such a thing as too big. As the size of the enclosure increases, the mechanical limits of the woofer will be easier to reach. If the box is too small (by a reasonable amount) add power. It will help the driver overcome the lack of volume present to still belt out that bass!
Can a port be too big?
It’s too big when it doesn’t fit in your box. You can have it outside the box. It is too big when it doesn’t fit in your room.
How is slot port area calculated?
The port area is in square inches, meaning it takes height times width to calculate total area. A port 4 inches high by 4 inches wide would calculate as 4 x 4= 16 in2. In our example box, we have an inside height of 14.5 inches.
How much air space does a 12 Sub need?
Tech Talk – Check Your Space Before You Buy Your Bass
| Volume | Number and size of Drivers | Port Area and Length |
|---|---|---|
| 1.75^ft | (2) 8″ or (1) 12″ | 28.0 sq” vent x 21.5″ long |
| 2.00^ft | (2) 8″ or (1) 12″ | 32.0 sq” vent x 21″ long |
| 2.25^ft | (2-3) 8″ or (1) 12″ | 36.0 sq” vent x 21″ long |
| 2.50^ft | (3) 8″ or (2) 10″ or (1) 12″ | 40.0 sq” vent x 21″ long |
What should my port area be?
To keep port velocities right around 30 m/sec you can multiply the square root of the power density by . 605 and that will give you how many sq in per cubic foot of box volume you need. So in my example of a 500 watts per cube enclosure that means you need 13.5 sq in per cube.