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SMART AUDIO 400
Issue
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 used
or turned on or off.
There is an audible hum.
The speakers are making a crackling
sound.
Audio is interrupted
15
smarttech.com/kb/171144
Solutions
Volume is set incorrectly. Set the volume while
l
standing beneath the speaker with the microphone.
TIP
Have someone else in the room help determine if
the volume is not loud enough.
Do not stand directly beneath the speakers. This can
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cause feedback.
TIP
Have someone else in the room help determine if
the volume is not loud enough.
Turn on dip switch 5 on the receiver. This will mute
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your microphone if a feedback loop starts.
Verify that the cables are connected properly.
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The speaker cables may be running parallel with
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power lines.
Replace any input cables that might be too long or
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are unshielded.
The speakers and the receiver aren't connected
properly.
If the crackling sound is coming from all the
o
speakers, check the connection at the back of
the receiver.
If the crackling sound is coming from only one
o
speaker, check the connection at the back of
the speaker.
Flip dip switch 8 on the receiver to boost the signal.
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Remove metallic obstructions between the receiver
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and the microphones.
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