Operating tips – Lectrosonics FM870 User Manual
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OPERATING TIPS
WHAT ARE THE CAUSES OF FEEDBACK?
Feedback (squealing) occurs when the sound from the speaker re-enters the microphone, comes back out
of the speaker again and re-enters the microphone, and so on. At a given distance between the
microphone and speaker, the sound can only be turned up so loud before feedback occurs. Moving the
mic further away from the speaker (or the speaker away from the mic) will allow a louder setting of the
sound system.
MAXIMIZING GAIN
1. Place the microphone as close to your mouth as is practical. This will increase the input level for the
microphone so that you are clearly picked up by the mic but background noise will be reduced.
2. Place the speaker (the main unit) as far as you can from where you’ll be speaking and in a position that
will cover your most distant listener.
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