Live Sound Reinforcement and Stage Setup
System design and placement
Live sound begins with the room and the stage. Understand front-of-house placement, main speaker coverage, subwoofer alignment and delay fills for deep rooms. Gain before feedback depends on microphone pattern, speaker placement relative to mics, and stage volume. Monitors sit in the performers' sightline and should be aimed away from microphones.
Stage setup
Know the standard stage plot: drum kit, backline, vocal positions, DI boxes, and cable runs. Use stage boxes and multicore to keep runs tidy. Label channels, provide a patch list, and confirm monitor mixes during soundcheck. Understand the difference between front-of-house and monitor world, and the role of a stage manager or crew chief.
Soundcheck and show operation
A soundcheck checks each input, sets gain, builds monitor mixes and confirms the house mix. During the show, watch for feedback, maintain headroom, and communicate with the stage. Know how to handle a dropped signal: check the cable, the channel and the mute before panicking.
Traps
Questions often claim feedback is solved only by turning down the master, when the better fix is microphone and speaker placement or a notch filter. Another trap is confusing front-of-house with monitor mixing responsibilities. Watch for answers that ignore stage volume as a cause of feedback, and remember that delay fills are timed to the main system to maintain intelligibility.
Rule of thumb
For feedback, first move the microphone or speaker, then apply targeted equalisation, and only then reduce overall level. Prevention beats correction.