EQ and FBQ and The Shark
EQ, Equalizers, are great ways to help shape the sound. Audio mixers have limited EQ in them, but sometimes we use an outside EQ. FBQ is an option installed in many Behringer mixers (I haven't seen them on other brands). And then don't forget about Behringer's SHARK to help process feedback.
Please watch this video to learn more about EQ. Leave me comments here on the website or on the channel.