How to Use Equalizers to Reduce Feedback During Live Performances

March 16, 2026

By: Audio Scene

Feedback during live performances can be a major challenge for sound engineers and performers alike. It often manifests as a loud, high-pitched squeal that disrupts the event and can damage equipment. One effective way to combat feedback is by using equalizers (EQs) to shape the sound and eliminate problematic frequencies.

Understanding Feedback and Equalizers

Feedback occurs when sound from speakers is picked up by microphones and amplified repeatedly, creating a loop. Certain frequencies are more prone to causing feedback, especially those that resonate easily in the room. Equalizers allow sound engineers to adjust the level of specific frequency ranges, reducing the likelihood of feedback without sacrificing overall sound quality.

Steps to Use Equalizers Effectively

  • Identify problem frequencies: Slowly increase the microphone volume and listen for the feedback pitch. Use a graphic EQ or parametric EQ to find the frequencies that cause the squeal.
  • Reduce problematic frequencies: Once identified, lower the gain on those specific frequencies gradually until the feedback diminishes or stops.
  • Fine-tune the sound: After reducing the feedback, listen to the overall sound. Make small adjustments to ensure clarity and balance.
  • Use notch filters: Many EQs have narrow band filters called notch filters. Use these to target and eliminate feedback frequencies precisely without affecting other parts of the sound spectrum.
  • Monitor throughout the performance: Feedback can shift as the room’s acoustics change, so continuously monitor and adjust the EQ as needed.

Additional Tips for Preventing Feedback

  • Place microphones away from speakers and reflective surfaces.
  • Use directional microphones to focus on the sound source and minimize pickup of unwanted sounds.
  • Keep the microphone gain low to avoid excessive amplification of ambient noise.
  • Utilize feedback suppression devices or software if available.
  • Arrange speakers to minimize sound bouncing back into microphones.

By understanding how to use equalizers effectively, sound engineers and performers can significantly reduce feedback issues, ensuring a clearer and more enjoyable live experience for everyone involved.