Pro Audio Support

Q:
I want to choose one pair of speakers, and automatically disable the last speaker channel that was on - so only one speaker output is on at a time.
 
A:
There are three speaker modes on the Presonus Monitor Station. In "Toggle" mode, only one choice between Speaker A, B or C disable can be on. To enable Toggle mode, press and hold "Speaker B" while powering the Monitor Station on.

Manual reference, page 12.