Sound Devices MM-1 Single Channel Portable Microphone PreampHighly versatile and portable, Sound Devices' MM 1 is a single channel, portable microphone preamplifier with a powerful headphone monitoring function. Proven in mission critical applications, the high performance microphone preamplifier uses a transformer balanced input and output with a bipolar 15 volt power supply to produce low noise, low distortion gain at all switch positions. It features an "unclippable" dual stage limiter and two position high