We covered the wiring of speakers in parallet and series awhile back -->
Click Here
Wiring speakers in parallel will give you a 2 ohm load - might work if you had a Bryston Amp. Wiring in series will have an effect on your impedence and frequency. See Alan's notes on the second page of the post.
I like the stacking idea - reminds me of, I believe it was Infinity, reference Speaker - with 75 drivers or something insane like that. Maybe you could stack them with a swivel in the centre - you'd have a set of Extreme Bose cubes - with sound actually worth listening to...
