<clik chart
for larger chart>
The sealed box is most often executed
using sheet material which yields a rectangular box with the least amount of effort.
It is best to keep internal dimensions from being integral muliples of any other
dimensions. One of the best ways is to use ratios based on irrational numbers.
The table below uses one of the
world's favorite irrational numbers. This is the Golden Mean
 0.618... & 1.618... Feel free to use other irrational numbers (ie: epsilon,
square root of a prime number (don't use root 2 twice), pi). Of course you can use
any face to mount the driver  as long as it is big enough.
Rectangular Box Internal Dimensions
(using Golden
Ratio 0.618:1:1.618)

V_{B} (litres)


2.6

4.25

9.43

20

200


Height


8.8"
222 mm

10.3"
262 mm

13.5"
342 mm

17.3"
439 mm

37.3"
946 mm

Width


5.4"
138 mm

6.4"
162 mm

8.3"
211 mm

10.7"
271 mm

23.0"
585 mm

Depth


3.3"
85 mm

3.9"
100 mm

5.1"
131 mm

6.6"
168 mm

14.2
361 mm


Boxes with walls that are nonparallel
tend to be better. Slanting the 2 largest panels is not that much harder and yields
what is termed a "pyramidal" box (even though not a true pyramid but a
trapezoidal cylinder). It is easy to change a rectangular set of dimensions to a
"pyramidal" box. If you subtract n units from the width of the top of the
box, add n units to the width of the bottom of the box. The shapes below give examples
based on the ratio used in the table.
You'll need to be a bit more creative
for even wilder shapes  spheres, ellipoids, use of found objects like pots...
