When you apply EQ to a Vocal, do you start with a flat EQ on the monitor/mains, EQ the mic then tweak the speakers or play a reference song and EQ the speaker and monitors before EQing the vocal?
There is no one right answer to this, Danny. I usually do it this way:
Play reference tracks with flat channel EQ to hear how the room sounds. Make any necessary adjustments to the Main LR EQ. I rarely use graphic EQ for the main outputs but prefer to use modest amounts of parametric EQ.
Audition individual channels and adjust channel EQ to suit the performer, mic and material. Refine the EQ when the whole band/group is playing to position the performer in the overall mix.
Adjust monitor bus EQ to get reasonable sound without any tendency to feedback. Graphic EQ (TEQ) can be helpful where monitor feedback is an issue - but good mic choice and monitor positioning are often better solutions.