Troubleshooting SMART Audio 400

Use this information to troubleshoot issues with the SMART Audio 400 classroom amplification system.

Issue

Solutions

The microphone is turned on and paired to the receiver, but MIC1 or MIC2 LED is not lit.

The BATT LED is flashing green or orange.

  • Microphone is muted.

    Unmute the microphone.

  • The microphone is pairing to a receiver.

    Wait for the microphone to finish pairing with the receiver.

The BATT LED is flashing yellow.

  • Microphone is out of range of the receiver. Move back into range.

The BATT LED is flashing red.

Issue

Solutions

All components are turned on and the microphones are paired, but there is no audio.

  • On the microphone, check for the audio from the AUDIO IN port, and then from the MIC IN port.

    If the audio is working from both ports and but not from the internal mic element, the microphone may be defective. Contact SMART for a replacement.

  • Check the connection from the receiver to the speakers. If the speakers are firmly and properly connected and there is still no audio, contact SMART regarding the receiver.

The audio is distorted.

  • 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.

  • Test the microphone from the malfunctioning system with a properly functioning system. If the audio is still distorted, contact SMART regarding the microphone.

  • 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.

  • 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.

  • 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.

There is an audible hum.

  • Verify that the cables are connected properly.

  • The speaker cables may be running parallel with power lines. Don’t run cables parallel to power lines.

  • Use only good quality cables for input. Make sure no cables are longer than 25' (7.6 m).

The speakers are making a crackling sound.

  • The speakers and the receiver aren’t connected properly.

    • If the crackling sound is coming from all the speakers, check the connection at the back of the receiver.

    • If the crackling sound is coming from only one speaker, check the connection at the back of the speaker.

Audio is interrupted.

  • Remove metallic obstructions between the receiver and the microphones.

You’re experiencing other issues with audio or the solutions above don’t resolve the issue.

Issue

Solutions

The receiver isn’t receiving power.
  • Test the outlet with a device known to be working correctly.

  • Try a different outlet.

  • If neither solution resolves the issue, contact SMART.

Issue

Solutions

The microphone isn’t charging.

  • Make sure the charging cable is inserted correctly in the AC adapter and in the microphone.

  • Make sure the cable is oriented correctly in the microphone. The arrow should face out towards the microphone.

Models

  • SMART Audio 400

Keywords

  • troubleshooting
  • teacher microphones
  • student microphones
  • audio
  • power
  • charging

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