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Sound Devices MM-1 Portable Mic Preamp with Headphone Monitor

MM-1 High Quality Mic Preamp with Headphone Monitor
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.

                        MM-1 Front Panel                                              MM-1 Back Panel
     Sound Devices MM-1       Sound Devices MM1                                                                         

Sound Devices MM-1 Portable Mic Preamp with Headphone Monitor
Product Code:SDMM1
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TA3-F to XLR-M 15" Adapter Cable

Key Features of MM-1

  • 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

Specifications of MM-1

Gain: (Mic - Line): 0 dB to 66 dB input to output, switch selectable
Frequency Response: (Mic - Line) 20 Hz –20 kHz, +0.1, -0.5 dB, -1 dB at 50 kHz(relative to 1 kHz level with 150 ohm source)
Equivalent Input Noise: (Mic) -126 dBu (-128 dBV) maximum (150 ohm source, flat weighting, 22 Hz – 22 kHz bandwidth gain setting 36 dB or greater)
Dynamic Range: (Mic to Line) 122 dB minimum at the +18 dB gain setting
THD + Noise: 0.05% maximum(from 50 Hz – 22 kHz @ +4 dBu output level, 22 Hz – 22 kHz filter bandwidth, +46 dB gain setting
Gain Accuracy: (Mic - Line) +0.6, -0.1 dB with reference to front panel gain markings (150 ohm source, 100 k load impedances)
Output Clipping Level: (Line) +22 dBu minimum with 100k ohm load+20 dBu minimum with 600 ohm load
Input Clipping Level: (Mic) +4 dBu minimum at the 0 or +18 dB gain setting
Common Mode Rejection Ratio: 100 dB minimum at 80 Hz60 dB minimum at 10 kHz
Weight: 0.7 kg (1.1 lbs)


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