Yamaha TRUE X SPEAKER 1A User Manual page 20

TROUBLESHOOTING > When a problem occurs
Broken, distorted, or unusual sound is heard from the unit
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The volume is too high.
Turn down the volume.
"Top controls/Front" (p.6)
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Electromagnetic waves being emitted from devices using the 2.4 GHz frequency band (such as
microwave ovens or wireless routers) are obstructing the wireless communication.
Do not use the unit near such devices.
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The unit and the Bluetooth device are too far away from each other.
Move the Bluetooth device and/or the unit so that they are closer to each other.
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