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-6, you can choose to power
from battery or continue to power from USB-C. We have designed the MixPre-6
so that even with an under powered USB-C source, you will still be able to use
two of the four channels with 48V phantom mics. The third and fourth channel
can still be used with dynamic mics and line, aux, or USB sources. To achieve
this we automatically do the following:
• Dim LCD and LED Brightness
• Disable USB-A port
• Disable HDMI TC port
I cant find what the required amperage is for full operation. Some of the USB-c batteries apparently do 3+ amps but would USB-A at 2.4 provide enough power?