Portable Headphone AmplifierPHA-1A

Even though the power/volume knob is in the on position, the POWER/CHG (charge) indicator lights up in red.

  • When the POWER/CHG (charge) of the headphone amplifier indicator turns off because the remaining battery power becomes low after being used for a long time, the POWER/CHG (charge) indicator lights up in red if you connect the DC IN 5V port of the headphone amplifier to a computer or other device. The headphone amplifier cannot be charged or turned on in this state. In this case, turn the power/volume knob of the headphone amplifier to the off position and charge it. After charging, the POWER/CHG (charge) indicator lights up in green and the headphone amplifier turns on when the power/volume knob is turned to the on position.
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