I also found that the subwoofer phase needs to be reversed when going from stereo to 5.1. If you normally listen to stereo, you might just leave the subwoofer phase optimized for stereo. Or if you normally listen to 5.1, leave the subwoofer phase optimized for 5.1.

Either that, or you can manually change the phase on your subwoofer each time you switch between stereo and 5.1.

Good luck!

[This message has been edited by Will (edited October 01, 2002).]