Personal Audio SystemSRS-X11

Distorted sound/Humming or noise in the speaker output

Turn down the volume of the connected device.
If the connected device has an equalizer function, set it to off.
Keep the speaker away from a microwave oven, Wi-Fi, etc.
Bring the speaker and the BLUETOOTH device closer together. Remove any obstacles between the speaker and the BLUETOOTH device.
Switch the BLUETOOTH connection to A2DP by operating the BLUETOOTH device when HFP or HSP is set.
Charge the speaker if the CHARGE indicator is flashing in orange.
The device with a built-in radio or tuner cannot be connected to the speaker via BLUETOOTH since noise may occur in broadcasts.
Locate the speaker farther away from a TV, radio or tuner, etc. since noise may occur in broadcasts.
When using the speaker add function, if any other BLUETOOTH device(s) such as a BLUETOOTH mouse or BLUETOOTH keyboard is connected to the BLUETOOTH device, terminate the connection between them.