Oppo HA-1 - Manual (Page 24)

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The input sources that are in Home Theater Bypass mode are indicated with a “BYPASS” banner in the Source
Selection screen.
Reset Factory Default Settings
If you need to reset the HA-1 to its factory default settings, please hold down the Source Selector Knob on the front
panel while at the same time press the MUTE button on the remote control. All custom settings will be erased and the
factory default settings will be loaded. The Volume Knob will automatically return to the minimum volume position. The
HA-1 will automatically turn off after resetting to factory default settings.
Source
Vo lume
Balanced
HEADPHONE AMPLIFIER HA-1 iPod/iPhone/iPad
USB