Building An Enclosure
To build a
Ported Enclosure
, the port’s displacement must be factored in. The mathematical equation to calculate port
displacement is:
(Pi x Port Radius x Port Radius x Port Depth) / 1728 = _________ Port Displacement
EXAMPLE
For this example, we will use a 4” port with a depth of 7.5”.
{Pi (3.14) x Port Radius (2”) x Port Radius (2”) x 7.5”} / 1728 = 0.054 Port Displacement Subtracting this from the
enclosure volume (1 – 0.054) gives a total enclosure volume of 0.946. Remember to subtract the woofer’s displacement,
supplied in the Recommended Box Sizes section of the Owner’s Manual.
Slot Ports
have become more popular than circle ports. The mathematical equation to convert a circle to a Slot Port is:
Pi x Radius x Radius =___________ square inches
EXAMPLE
We will convert a single 4” circle port with a depth of 7.5”.
The mathematical equation is Pi (3.14) x Radius (2”) x Radius (2”) = 12.56”.
12.56 square inches is the conversion used to make a Slot Port. Whatever dimensions used for the slot port, the calcula-
tion needs to be 12.56 square inches. Therefore, the slot port would be 1” wide and 12.56” tall. To make a slot port we
simply multiply Height x Width = 12.56 square. The depth of the port will remain the same. Your converted port dimen-
sions would be 1” wide x 12.56” tall x 7.5” deep.
(NOTE: Do not forget to calculate the slot port’s displacement; it takes more air space than a circle port. When calculating
the port’s displacement, also calculate the thickness of the wood.)
.
8
Summary of Contents for SW101W
Page 1: ...Owner s Manual Please Read This Manual Before Operating Product...
Page 2: ......
Page 12: ...Parallel Dual 4 Ohm 0 5 Ohms 0 67 Ohms 1 Ohm 2 Ohm 11...
Page 13: ...Series Parrelel Dual 4 Ohm 2 Ohms 2 67 Ohms 4 Ohms 12...
Page 14: ...Series Dual 4 Ohm 32 Ohms 24 Ohms 16 Ohms 8 Ohms 13...
Page 15: ...14 Parallel Single 4 Ohm 4 ohm 2 ohm 1 33 ohm 1 ohm...
Page 16: ...15 Right Series Single 4 Ohm 4 ohm 8 ohm 12 ohm 16 ohm...
