Feedback can be a persistent challenge on stage, especially when dealing with stage monitors. It occurs when sound from the monitors is picked up by the microphones and re-amplified, resulting in that dreaded high-pitched squeal or howling sound. Feedback not only compromises the audio quality but can also disrupt performances. In this article, we will discuss practical techniques to help you effectively eliminate feedback on stage monitors and create a more controlled and enjoyable monitoring experience.
- Proper Monitor Placement:
Carefully position your stage monitors to minimize the chances of feedback. Place the monitors in front of the performers, facing away from the microphones. Aim the monitors towards the performers’ ears, providing them with sufficient audio coverage without directly pointing the sound into the microphones. Experiment with different angles and heights to find the optimal placement that maximizes sound clarity while minimizing the potential for feedback.
- Monitor EQ and Volume Control:
Use the monitor equalization (EQ) controls to shape the monitor mix and prevent feedback. Start by reducing or cutting frequencies that are prone to feedback, such as the high-mid and high frequencies. Carefully adjust the EQ settings to provide a balanced and clear monitor mix without excessive boosting that can lead to feedback. Additionally, ensure that the monitor volume is set at an appropriate level that allows performers to hear themselves clearly without pushing the monitors to the point of feedback.
- Monitor Positioning and Distance:
Encourage performers to stay at an optimal distance from the stage monitors to minimize the chances of feedback. The closer the performers are to the monitors, the more likely feedback will occur. Provide clear instructions to the performers about maintaining a reasonable distance from the monitors while still being able to hear themselves effectively. Educate them about the importance of microphone technique, including proper positioning and angling, to further reduce the risk of feedback.
- Monitor Check and Soundcheck:
Conduct a thorough monitor check and soundcheck before performances to identify and address potential feedback issues. During soundcheck, ensure that each performer can hear their respective instruments and vocals clearly without feedback. Address any feedback-prone frequencies or volume imbalances by adjusting monitor EQ and levels accordingly. Encourage open communication between performers and the sound engineer to fine-tune the monitor mix and resolve any feedback concerns before the show begins.
- Feedback Suppression and Notch Filters:
Consider utilizing feedback suppression devices or notch filters to dynamically control feedback on stage monitors. Feedback suppression devices analyze the audio signal and automatically apply filters to attenuate or eliminate feedback frequencies in real-time. Notch filters can be manually applied to specific frequencies prone to feedback using graphic or parametric equalizers. These tools can be valuable additions to your arsenal in combating feedback issues and maintaining a clear and controlled monitor mix.
- Acoustic Treatments and Isolation:
Implementing acoustic treatments on stage, such as absorptive panels or curtains, can help minimize the reflection and buildup of sound waves that contribute to feedback. These treatments can help absorb excessive sound energy, reducing the potential for feedback. Additionally, using isolation techniques, such as using baffles or shields to separate microphones from stage monitors, can further isolate the sound sources and prevent feedback loops.
Conclusion:
Eliminating feedback on stage monitors requires a combination of proper monitor placement, EQ control, monitor positioning, thorough soundchecks, feedback suppression devices, acoustic treatments, and isolation techniques. By implementing these techniques and creating a collaborative environment between performers and sound engineers, you can effectively manage feedback issues and provide a clear and controlled monitoring experience on stage. Remember, a well-balanced and feedback-free monitor mix enhances the performers’ confidence and allows them to deliver their best performances.
