You can power this unit with a commercially available USB adaptor, from the USB port on your computer and from similar sources.

The following USB power sources can be used.

  • USB AC adaptor
  • USB bus power (computer, etc.)

  • Mobile battery

We cannot guarantee that this unit works universally with all USB AC adaptors, power from USB ports on computers or mobile batteries.


Conditions for powering this unit via USB port

When supplying power to this unit via the USB port, be sure to use a cable with USB Type-C® connectors on both ends. No other USB cables can be used, as they cannot provide enough power to operate the SP-404MK2. Also note that even when using cables that have a USB Type-C® connector on both ends, you cannot power this unit from devices like USB hubs with insufficient current output.

The USB port on the device from which this unit draws power must supply 5 V of output voltage and at least 1.5 A of output current.


When not enough power is supplied to the USB port

In the event that not enough power is supplied to the USB port of this unit (such as when you try to supply power from a USB Type-A connector or when the output current is less than 1.5 A), the message “Switch to batteries” appears.

When this happens, press the [VALUE] knob to switch to battery power. Note that if there are no batteries installed, the unit powers down.