This unit does not work on USB bus power.

This unit does not support a USB mobile battery and USB power adapter. To supply power to this unit with USB bus power, use a USB port of a computer.

Furthermore, the unit may not be able to operate on USB bus power due to the power supply capacity of the computer being insufficient.

Check the following items.

The USB power supply capacity of a USB port of the computer is low. 　-> Connect to a USB port that provides sufficient power. Furthermore, if the computer is running on its battery, supply power from the AC adapter.

Other USB devices are connected to other USB ports of the computer. 　-> Disconnect the other USB devices to secure power for the USB port.

Headphones with an impedance of less than 32 Ω are connected. 　-> Connect stereo headphones with an impedance of 32 Ω or higher.

Headphones are connected to both the stereo phone jack and the stereo mini-phone jack. 　-> Connect headphones to either just the stereo phone jack or just the stereo mini-phone jack.

The computer is connected with a USB cable other than the included cable. 　-> Connect using the included USB cable.

A USB hub is being used. 　-> Connect directly without using a USB hub.