Sound Device Portable Audio Tools MM-1

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Description

Highly 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-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.

Front Panel

Front Panel
  • Switched gain for microphone preamp,
  • Two-position high-pass filter,
  • Switched peak limiter,
  • LED for limiter or peak indication,
  • Variable level control for monitor signal,
  • Headphone volume control,
  • Headphone output on 1/4-inch connector,
  • Power LED shows green on power and red when batteries are low,
  • Power switch selects batteries or external DC,
  • Protective metal end rails and belt clip.

Back Panel

Back Panel
  • Transformer-balanced microphone input,
  • Transformer-balanced line level output,
  • Monitor source input on TRS 1/4-inch, balanced connector,
  • 48 V or 12 V phantom,
  • Phantom, dynamic, or T power,
  • Battery compartment, two AA,
  • External 5 - 17 V DC power.

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
Sound Device Portable Audio Tools MM-1
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