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Basically start with a box size you'd like to
use and measure length x
width x height to get total cubic inches. Then divide that by
1728, that is how many cubic inches are in a cubic foot. So for
example lets say you want to try and make a box that is 15 x 14 x
8....so that is: 1680 cubic inches...divide by 1728: .97 cubic feet. so
if your sub needs 1.5 cubic feet you'll have to think bigger or if
the sub requires 1.0 cubic feet you can fix that by adding fiber fill.
This will make the sub 'think' the box is bigger than it is....but I
would redo the box size and not go that route unless absolutely
necessary for room!
Don't forget that the walls of the box must be
added in or make sure the INTERNAL volume is being measured and NOT
the overall volume! For instance if you have 20 inches of measurement per side
(l x w x h) you'll have 4.6 cubic feet. If you forget about the 3/4 inches MDF you'll wind up with 3.6 cubic feet! that is a BIG
difference! and could be costly!
Each sub
should be in it's own enclosure. Build a big box and
wall it off in the middle. When trying to mess with Plexiglas, good
luck! You'll need to cut it and figure out a good way to mount it! Never
messed with the stuff... never will! You'll also need at least 3/4 inch
of it!
After you've gone through all the hair pulling from measuring, and
remeasuring (don't get this wrong! better to take your time instead of
having the wrong size box!) it's time to cut and put together your box!
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