ST 1 (stereo 1) jacks
ST 2 (stereo 2) jacks
These phone jacks output the line-level signals of the STEREO bus. Connect an external mixer or additional PA system to these jacks.
Use the ST 1 fader (control panel H) to adjust the final output level at the ST 1 jacks, and use the ST 2 control (control panel [) to adjust the final output level at the ST 2 jacks. The nominal output level is +4 dB.
MONI 1 (monitor 1) jack
MONI 2 (monitor 2) jack
These phone jacks output the line-level signals of the MONITOR 1/2 buses. Connect stage-monitoring amplifiers or powered speakers here. Use the MONI 1 fader (control panel E) and the MONI 2 fader (control panel F) respectively to adjust the final level of the signals output from these jacks. The nominal output level is +4 dB.
https://usa.yamaha.com/files/d(...)E.pdf