User Manual

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10 Graphic EQ
10.4 Using the RTA to Ring Out Monitors
StudioLive™ Series III
Owner’s Manual
4. Slowly bring the aux output level up until you hear (and see) feedback.
Note: Ringing out stage monitors will produce feedback. If you are not careful, you can
produce a lot of feedback. Do not make sudden gain boosts; go slowly and carefully to
avoid causing any damage to speakers and ears.
5. Feedback will show up as a line peak on the RTA.
6. Lower the GEQ gain control for the offending frequency in 3 dB increments to
attenuate it out of your stage monitor.
Power User Tip: Bring back the level on the GEQ slider to the point just before feedback so
you don’t take out too much frequency content and sacrifice overall timbre. Because the
speaker is pointed at the mic, stage-monitor feedback typically occurs in the higher
frequencies, which also is where intelligibility comes from. Maximizing your intelligibility
and gain structure results in clearer-sounding monitors.
You can apply this process to the main system, as well. This is especially useful with
applications requiring lavaliere or podium mics. These types of microphones are
typically omnidirectional condensers and are very prone to feedback.
In a main system, feedback is typically in the mid to low range. The frequencies
that are regenerating and creating a feedback loop are those frequencies that are
wrapping around the main system due to the loss of directional control of lower
frequencies.
When you are ringing out a system, and more than two or three feedback loops are
happening simultaneously, you have reached the level where stability can no longer
be achieved. Try bringing down the overall output level or find a physical solution,
such as moving the speaker or microphone.