Play a mono musical signal into an input channel on your
mixer, and assign it to the stereo output channels 1 and 2.
2. Adjust the input channel’s pan pot so that the signal reads the
same on the stereo output channel 1 and 2 meters.
3. Place the two speakers the same distance from you.
4. Sit at the mixer exactly midway between the speakers. If you
sit off-center, you will hear the image shifted toward one side.
Listen to the image of the sound between the speaker pair.
You should localize it midway between the monitors; that is,
straight ahead.
5. If necessary, center the image by adjusting the left or right volume control on your power amp or powered monitors.