I want to build a sub woofer speaker box as an octagonal cabinet, around 2 1/2
cubic feet.

I've seen these types of end tables in the 70s, and think they are cool. They
look almost like a drum...

Any tips on how to put something like this together? So far I've only built
square things!

The speaker will face down, it will be on legs a few inches off the floor, and
the amp module will be on the side. The top will serve as a table.

It should be around 17" wide across 2 facets... any ideas on how to calculate
dimensions and angles? I've figured the facet angles to be 22.5 if symmetrical,
but I may not build it exactly all equal... maybe 4 sides will be 9" and the
other 4 something else... I need 9" for the module plate. Or maybe only one side
will be different...

Can this be biscuit joined or is there a better way? I might build it out of
11/16 pine for good looks, (most of my stuff is pine) backed up with something
heavy to kill vibrations. Or maybe I'll just veneer it... not sure at the
moment!

Thanks in advance.