Tim,
I had an obvious typo in my rather long, previous email. The adjusted
height, in the example I posed was indicated initially as 40" and then
became 41" in the computation. I later bumped it up to get a little
closer to 12 cu/ft. but forgot to change the previous entry.
I also didn't mention that all the panels would then be run through the
table saw with fence at 41". One point of this example, that some how
got lost, was that once you set the fence, you cut every possible
component (panel) that will share that dimension. Then everything is
the exactly the same and assembly of the enclosure will be square and
tight. Just a thought.
Also, the (cut off) scrap that will now be generated will have convenient
lengths allowing it to used for further bracing. As long as you don't
reduce the (net) volume (Vb), you can't have to much, well placed,
bracing in a sub woofer of this magnitude.
This style of tower construction allows the enclosure volume
(adjustments) to be a function of one dimension. The height. Even if
you needed to increase volume slightly beyond that of the existing
height, a (stylish) base could be constructed to extend. As indicated,
leaving the panels at 48" would result in about 14cu/ft. (gross) volume.
Cutting the height to 41" would result in about 12 cu/ft (gross)
volume. By playing around with height only, you can get any (gross)
volume you want, up to 14 cu/ft.
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