From the site:
In a good two or three microphone stereo recording, bass information can arrive at different times at each microphone. The arrival time at each microphone can be such that at some very low frequencies the sound is 180 degrees out of phase. If you combine these frequencies into mono, the result is zero output at those frequencies. This means if you have a 32 Hz organ pedal note that has a phase difference of 180 degrees between channels, you will get nothing and feel nothing, except perhaps hear a few harmonics. I think even a deaf person can feel the difference between a 32 Hz note being present or not!
As long as you don't listen to any musical insturmets below, what, 80hz?
http://www.independentrecording.net/irn/resources/freqchart/main_display.htm
It's far less of an issue in HT, where the soundtracks have been mixed assuming mono subs.. but it's something I at least try my best to avoid in critical music listening.
I mean: whatever works, but I would think that music fedility would be better served 2.0 than 2.1, and use the sub money to try to improve the response on the mains.
