If your speakers are set up for multichannel, the left and right are too far apart for stereo. With a 2-channel source like a CD you must come up with a center signal/speaker, or be faced with moving speakers around when playing a stereo recording.
I have yet to find a 2-channel recording that is not improved by using a center channel. This is not true about matrix-generated rear channels, although a very few stereo recordings respond well.
I have yet to find a 2-channel recording that is not improved by using a center channel. This is not true about matrix-generated rear channels, although a very few stereo recordings respond well.