The NY Times covers a B&O speaker that adjusts its tone to suit the shape of the room:
As its downward-facing deep bass driver, or woofer, emits several test tones, an onboard microphone at the bottom of the speaker picks them up. Then a servomotor moves the microphone several inches so that it protrudes from the bottom and can pick up reflections from the room, and the tones are emitted again. A signal-processing chip within the speaker analyzes the difference between the two tests and digital equalization circuitry, also on board, adjusts the sound.
Nifty. Sadly, the design they went with is way too Jetsons for me.
