Sound Devices MM-1


Battery-powered microphone preamplifier with headphone monitoring


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.

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

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
High-strength aluminum chassis with durable belt clip

Whats in the box:
1 MM-1
1 Coaxial female power connector
4 Adhesive rubber “bumpers”
1 Product registration card
1 Packing List (this sheet)