Check the following depending on the equipment you use.

■When using the unit with a PC/Mac

There's no need to connect a USB power adapter or mobile battery to the USB port (for power supply).

Disconnect the USB power adapter or mobile battery from the USB port (for power supply), then connect the PC/Mac to the USB port (for device connection).

*Connecting a USB power adapter or mobile battery to the USB port (for power supply) will not improve sound quality or operation when a PC/Mac is connected to the unit.

■When using the unit with a mobile device

The supply capacity of the USB power adapter or mobile battery connected to the USB port (for power supply) is insufficient.

Connect a USB power adapter or mobile battery that supports DC 9V 3A to the USB port (for power supply).