Sound Device MM-1, highly versatile, 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-pass filter. Flexible microphone powering provides phantom power at 48 volts or 12 volts and 12-volt T-power. It is powered from two-AA batteries or external 5-18 VDC.
The MM-1 is at home in high-definition television production, corporate/industrial environments, radio/television announce booths, and music production. Its headphone monitor is an advantage in applications where communications channels or mix-minus feeds need to be monitored in headphones. The user can monitor both microphone audio and external audio sources in headphones with level control.
The MM-1 is designed to be durable. Its aluminum chassis, oversized end panels, machined knobs, and panel mounted connectors assure reliable mechanical operation.
MM-1 Key Features
•Maximum of 66 dB of gain, in eleven discrete steps
•Dynamic range exceeding 120 dB
•10 Hz to 50 kHz audio bandwidth
•High immunity to RF interference
•High current line output driver
•Transformer-balanced input and output
•Extended range peak limiter via dual opto-isolators makes preamplifier virtually "unclippable"
•Selectable 48-volt / 12-volt phantom power or 12-volt “T" power
•High-pass filter @ 80 or 160 Hz, 6 dB per octave
•Headphone monitoring of microphone audio, monitor audio, or a mix of both
•Monitor input accepts mono, balanced or unbalanced line-level inputs on 1/4-inch tip-ring-sleeve connector
•Separate level control of Monitor gain and overall headphone gain
•Split ear function via DIP switches
•Internal battery power (two-AA)
•Excellent battery life with alkaline and NiMH rechargeable batteries
•External 5-17 VDC powering (plug included)
•High-strength aluminum chassis with durable belt clip