PROVANTAGE / Production Notes 06
Feedback is a loop problem, not an EQ preset.
Gain before feedback is the usable amplification available before sound from a loudspeaker returns through a microphone strongly enough to sustain oscillation.
The selection principle
START WITH
THE APPLICATION.
Improve the acoustic geometry first: move the desired source closer to the microphone, reduce loudspeaker energy at the microphone and control unnecessary open channels before reaching for aggressive equalisation.
Equipment follows the production decision.
Five-question selection check
Source distance
How close can the microphone be to the desired voice or instrument?
Speaker geometry
Which loudspeakers or monitors send energy back toward the microphone?
Open microphones
How many channels are contributing room and system energy at once?
Coverage
Can level at listeners improve without increasing level at microphones?
Response
Are narrow peaks or uneven coverage reducing the practical margin?
Application notes
Context changes the answer.
Corporate speech
Consistent close microphone placement and disciplined automixing can protect intelligibility across panels and lecterns.
Stage monitors
Pattern-aware wedge placement and performer proximity matter before monitor level and EQ are debated.
Ballrooms
Distributed coverage can reduce the distance each loudspeaker must throw, but delay, level and aiming must be engineered together.
The common mistake
Cutting every frequency that begins to ring
Equalisation can address response peaks, but it cannot repair a distant talker, a loudspeaker aimed into a microphone or too many uncontrolled open microphones.
Operational checklist
Brief. Test. Document.
01 / Place microphones close to intended sources
02 / Aim loudspeakers away from microphones
03 / Use the correct polar rejection zones
04 / Mute channels that are not required
05 / Set coverage and delays before chasing level
06 / Test realistic movement and programme conditions
Technical sources
Primary references.
These sources support the technical principles. They do not imply endorsement, inventory ownership or a universal equipment recommendation.
The PROVANTAGE position
A better brief produces a more dependable system.
We select, place and operate production technology around the room, programme, people and consequences of failure.
Plan the technical brief