Issue
Solutions
The audio is distorted.
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If a device is connected to the teacher or student
microphone using the AUDIO IN port, set the
device’s volume to 80–90% of its maximum volume.
Then use the volume controls on the teacher
microphone to adjust the volume.
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Turn on dip switch 8 on the receiver.
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Test the microphone from the malfunctioning system
with a properly functioning system. If the audio is still
distorted, contact SMART regarding the
microphone.
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Test a microphone from a properly functioning
system with the malfunctioning system. If the audio is
still distorted, contact SMART regarding the
receiver.
There is audio feedback.
NOTE
Feedback occurs when the
microphone picks up audio from
the speakers and transmits it to the
speaker again in a loop. Feedback
sounds like an intermittent high-
pitched squealing or burst of
sound, and it can occur when you
stand in a particular spot (especially
if the microphone is very close to
the speakers) or randomly in a
room.
Feedback is distinct from a buzzing
or humming, which is a constant low
noise that doesn’t necessarily
change when the microphone is
used or turned on or off.
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Volume is set incorrectly. Set the volume while
standing beneath the speaker with the microphone.
TIP
Have someone else in the room help determine if
the volume is not loud enough.
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Do not stand directly beneath the speakers. This can
cause feedback.
TIP
Have someone else in the room help determine if
the volume is not loud enough.
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Turn on dip switch 5 on the receiver. This will mute
your microphone if a feedback loop starts.
There is an audible hum.
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Verify that the cables are connected properly.
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The speaker cables may be running parallel with
power lines. Don’t run cables parallel to power lines.
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Use only good quality cables for input. Make sure no
cables are longer than 25' (7.6 m).
