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Wireless Frequencies

H.O.W. Tips & Tricks - Lose the Feedback

Audio Sound Systems, Houses of Worship, voice, microphone

Tips & Tricks
Lose the Feedback
By Kent Margraves, Sennheiser

Improving Gain-Before-Feedback in Worship

*This discussion focuses on the processing and optimization of miked sources on the worship stage, using the equalization available in the PA console channels strips or outboard equalization inserted into these channels. It does not discuss overall system processing or "tuning" and assumes appropriate system installation and optimization.*

Have you ever experienced a case of microphones squealing feedback before they are loud enough in your PA mix? Even with great mics and a wise layout, sometimes you could still use more GBF (gain-before-feedback). We'll take choir miking as our example for discussion. We usually mic choirs with several cardioid condenser microphones, right?

The feedback that occurs here is caused by the microphone(s) hearing itself being amplified in the PA system. The microphone picks up the source in front of it (good) and also picks up itself coming out of the PA (bad). So, since we wish to have the mics "hear" less of themselves from the loudspeakers, several ideas seem fairly straightforward for increasing GBF:

Turn it down
Use fewer microphones
Use directional mics aimed at the choir (and away from the loudspeakers)
Move the mics closer to the choir (and further from the loudspeakers)
Use directional loudspeakers, placed and aimed away from the mics
Use parametric equalization

For more detailed information, click here

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What worship ministries are saying about Sennheiser...

"I also would like to thank you and Sennheiser for not only your assistance with the whole TVBD fiasco, but your support of the H.O.W. market in general. It is truly remarkable these days to have a manufacturer of the size of Sennheiser that allows its personnel to interact with the end-user not only through outlets such as CSC, but the rapid personal response to crazy tech guys like me! It is why I can recommend using your products so readily."

Jay Ballard, Director of Technical Ministries, First Baptist Church of Plant City, Florida