Headphone Gain Selection - Oppo HA-1 User Manual

Headphone Gain Selection

For optimal sound quality, you can select the Headphone Gain setting between High and Normal in order to properly
match the sensitivity and impedance of the headphones in use. The following selections are available:

High (default) – The headphone amplification circuit of the HA-1 applies the high gain level, which is about
18dB higher than Normal. This setting is recommended for headphones with low sensitivity or high
impedance.

Normal – The headphone amplification circuit of the HA-1 applies the normal gain level. This setting is
recommended for headphones with high sensitivity or low impedance.
The rule of thumb for selecting the proper gain level is to find a comfortable listening volume that utilizes the upper
range of the Volume Knob. It is generally better to have the Volume Knob set to a high volume level when using the
Normal gain setting rather than having the Volume Knob set to a low volume level when using the High gain setting.
Note:

In order to prevent a sudden loud sound from damaging your headphones and hearing, please turn down the
volume before changing the Headphone Gain setting.
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