Sound Devices MM-1 - Manual (Page 7)

MM-1 User Guide and Technical Information
7
Headphone Monitoring
With headphones connected to the front panel headphone jack the MM-1 can be used to monitor
either microphone audio, monitor audio, or a mix of both signals. The Phones level controls the
overall headphone volume. The Monitor Gain adjusts the level of the monitor input signal.
The MM-1 is capable of driving headphones to dangerously high levels. Take precautions to prevent
hearing damage.
Battery Life
Several factors affect battery life, including battery chemistry, ambient temperature of operation,
microphone powering, and headphone drive levels. Experimentation is recommended to determine
battery life for each individual setup.
Nickel-cadmium batteries are not recommended in the MM-1. These batteries have low energy per cell
versus other types and provide very short operation.
Battery Type Operational Characteristics Battery Life
Duracell AA MN 1500 powered, idle 20 hrs.
Duracell AA MN 1500 dynamic microphone, +4 dBu output, 75
ohm headphones at moderate level
14 hrs.
Duracell AA MN 1500 condenser microphone (48V), 75 ohm head-
phones at high levels
8 hrs.
2000 mAh NiMH AA dynamic microphone, +4 dBu output, 75
ohm headphones at moderate level
17 hrs.
(Test conditions: 70º F)