Owner`s manual

To obtain the best audio results it is recommended to keep always the Wave slider at
the maximum level and to use the Master Out to adjust the output level.
NOTE: when a full-scale digital signal is played and the Wave slider is at 100%, it is
recommended to keep the Master Out slider at about 80%. Otherwise a distortion
could occour on the output.
This is a design choice: the internal gain of the output buffers are fixed in this way in
order to offer an extra-gain amplification in case of low level signals.
X2 Owner's Manual - Rev. 1.4 - page 15