Feedback Control
Feedback can occur when part of the output signal returns back to the input side of the amplifier. It is often caused by the
microphone being too close or in front of the speakers. It can also result from the proximity effect, that is, when a person
speaks too closely to a microphone. If you encounter feedback while using the lectern, try these techniques:
If using the Lectern Microphone (gooseneck mic):
• Reposition the microphone
• Reduce volume level
• Reduce the Treble level
• Enable the Speech Filter
If using another microphone (Mic
1
):
• Make sure that the person using the microphone stays in back of the lectern
• Reduce the volume level
• Reduce the Treble level
• Enable the Speech Filter
Maintenance
The exterior surfaces should be cleaned with a soft cloth moistened with a mild soap solution. Do not use abrasives or
solvent-based cleaners. Do not allow liquid to enter the black grille material.
Service
Caution:
There are no user serviceable parts within the amplifier. To avoid an electric shock, do not remove any of the
amplifier covers.
Have all internal servicing performed by a qualified technician. The warranty will become void if repairs are made by
other than the Bogen Service Department or authorized service agency. In the event of difficulty, contact our techni-
cal support group,
1
-800-999-2809, 8:30 AM until 6:00 PM, Eastern Standard Time, Monday through Friday.
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