Numark SING MASTER Guide D'utilisation page 6

Speaker-Mounting
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Check the specifications of your stand or pole to ensure it can support Sing Master's weight.
Also, observe all safety precautions specified by the manufacturer.
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Always verify that your stand or pole is on a flat, level, and stable surface. Also, fully extend the legs of
tripod-style stands, and ensure its legs do not present a trip hazard.
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Always be cautious in windy, outdoor conditions. You may need to place additional weight (e.g.,
sandbags) on stand's base to improve stability.
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Make sure your cables are out of the way of performers and audience so they will not trip over them,
pulling the speaker off the stand or pole.
Troubleshooting
If you can't hear any sound from the microphone: Make sure the microphone On/Off switch is "on".
If the sound is distorted: Try lowering the volume control of your sound source or microphone. Also, try to
reduce the overall volume of Sing Master using the Master Volume knob.
If there is a high-pitched whistling noise when using microphones: This is probably feedback. Point the
microphone away from the speaker.
If you can't hear the microphone over the music volume: Turn down the music volume from your source.
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