Originally posted by cassp:
Never could figure out how or why Mackie has that stereo/mono switch; why not just use the stereo fader to adjust output.
A monitor mix is "PRE" tone and volume sliders. If you used the L/R outputs to control mains and monitors, you would have the same EQ and effects in the each. This is not always a bad thing, but often produces feedback in the monitors because of certain EQ.
The option of using each power amp to drive a separate speaker system is a blessing. Now, you have 3 independant mixes.
Left Main could be vocals
Right Main could be instruments
Monitors can be whatever is desired.
It makes for more options, that's all.