MM-1

Battery-powered microphone preamplifier with headphone monitoring

Overview

  • 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
  • High-strength aluminum chassis with durable belt clip

Battery-powered microphone preamplifier with headphone monitoring. 48 V phantom and T-power, limiter, high-pass filter. 2-AA or external DC powered.

The MM-1: High Quality Mic Preamp with Headphone Monitor

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.

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 5-17 VDC.

Go here for recommended third-party power supplies and recommended third-party locking connector.

One-year standard warranty turns into two-years upon registration.

What’s in the box:

  • MM-1 Mic Preamp
  • Coaxial female power connector
  • 4 Adhesive rubber “bumpers”

Specifications

Click on each group to expand. Specifications are subject to change without prior notice.

Gain
  • (Mic – Line): 0 dB to 66 dB input to output, switch selectable

Analog Input
  • 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)
  • 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

Output Clipping Level
  • (Line) +22 dBu minimum with 100k ohm load+20 dBu minimum with 600 ohm load

Weight
  • 0.7 kg (1.1 lbs)

Dimensions
  • 49 mm x 95 mm x 166 mm, 1.95″ x 3.75″ x 6.55″ (h x w x d)

Support

Product Registration

Extend your one year warranty to a two year warranty by registering.
Register Now

Repair Request

Request service from one of our authorized technicians.
Request a Repair

Contact Support

Have a question for our support team? We are here to help.
Contact Support

Downloads

No firmware downloads available