Sound Devices MixPre II Series, Manual, Page: 14 / 73

Powering the MixPre II
Apply your choice of power source. Turn the master power switch located in the upper right corner of the left side panel to the On
position. To ensure the battery/power status indicator displayed on the touchscreen shows accurate level and status, select your
battery/ power type in the Power menu.
When using AA batteries to power the MixPre II, we recommend Energizer Ultimate Lithium (not alkaline batteries). The high internal
resistance of alkaline batteries makes them only suited to devices requiring low current (less than 25 mA), not higher power
electronic devices such as the MixPre II.
Incorrect use of batteries poses a danger of explosion. Replace only with the same or equivalent type. Properly recycle batteries. Do
not crush, disassemble, incinerate, dispose in a fire or expose batteries to high temperatures.
Save power by turning off unused channels.
With multiple options for powering, your MixPre II can operate in a wide array of applications and environments.
MixPre-3 II and MixPre-6 II Power Options
1. Included MX-PSU AC wall adapter to USB-C power supply.
2. Four AA batteries installed in the included MX-4AA Battery Sled.
3. Eight AA batteries installed in the optional MX-8AA Battery Sled accessory.
4. One or two Sony-type L-Mount batteries installed in the optional MX-LMount battery sled accessory.
5. USB-C to USB-C cable (included) connected to a USB-C host computer or AC wall adapter.
6. USB-A to USB-C cable connected to a USB-A host computer or AC wall adapter. The unit will enter a low power state
and some functionality will be limited with this power option.
7. MX-USBY Dual USB-A to USB-C optional accessory cable connected to a USB-A host computer. Use this cable option
if your computer is unable to provide adequate power with only one USB-A port.
MixPre-10 II Power Options
1. Included XL-WPH3 AC to DC 12 V Power supply with 4-pin Hirose.
2. Eight AA batteries installed in the included MX-8AA Battery Sled.
3. One or two Sony-type L-Mount batteries installed in the optional MX-LMount battery sled accessory.
Power Switchover and Priority
MixPre-3 II and MixPre-6 II
To preserve battery power, USB-C power sources take priority over batteries if both are connected with one exception - if the USB-C
power source does not meet the full power requirements of the MixPre II, you can choose to power from battery or continue to
power from USB-C. An underpowered MixPre II will be able to use two of the three or four channels with 48 V phantom mics. Other
channels can still be used with dynamic mics and line level, Aux, or USB sources. In a low power state, the MixPre II automatically:
1. Dims LCD and LED Brightness.
2. Disables USB-A port.
3. Disables HDMI TC port.
For protection against accidental loss of power, the MixPre II incorporates circuitry to automatically switch over from USB-C to
batteries.
MixPre-10 II
For preservation of battery power, 4-pin Hirose power sources take priority over batteries if both are connected. For protection
against accidental loss of power, the MixPre-10 II incorporates circuitry to automatically switch power sources.
MixPre II Series User Guide 13