Output volume
The WOLFWAVE has a volume knob to control the output volume, plus a setting for adding a fixed gain/attenuation to this (i.e. adjusting the output volume produced when the volume knob is turned to max).
In addition, the gain of the headphones and speaker outputs can be adjusted independently, which can be a useful way of limiting the maximum output power to a comfortable level.
The output volume settings can be found in the menu under "Other settings > Output volume".