Power Switch; Power Led - Sound Devices MixPre User Manual

9. Headphone Connector
Accepts stereo and mono headphones with 1/4-inch connectors.
10. Headphone Volume Control
Adjusts the level in the headphones.
11. Headphone Peak LED
Illuminates 3 dB before clipping of either channel of the headphone
circuit. Also illuminates 3 dB before clipping of either channel of Tape
Return audio.

12. POWER Switch

Three-position switch selects the power source. The unit is powered from
internal batteries when in the left position; powered from external DC
source when in the right position. Center position is off.

13. POWER LED

Two-color LED illuminates green when the unit is powered and changes
to red when batteries require changing. For external DC, the power LED
is always green.
User Guide and Technical Documentation
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