Originally Posted by Pointerman
I'm with Joe. Last time I checked base was non-directional (thus the need for only one speaker in a home theater setup) and treble tones are directional. The lower pitched the tone the more likely it is to travel in all directions.
At lower frequencies acoustic waves become more omni-directional, which means it gets more difficult to pinpoint its source. It does not necessarily mean that it radiates in all direction from the source.
In a home audio system a single sub-woofer cabinet will perform well because of the onmi-directional nature of the bass frequencies. The more uni-directional nature of the higher frequencies require two sources interacting through constructive/destructive interference to provide imaging and sound-staging that stereo reproduction is designed to create .