MM-1 Sound Devices MM-1 Microphone Preamps

Sound Devices MM-1
Line Driver / HP Monitor
The portable MM-1 combines two essential production functions — microphone preamplification and headphone monitoring — in one compact product. The MM-1 is a no-compromise, studio-quality microphone preamplifier with phantom power, high-pass filter, and built-in limiter. With its monitoring function providing fold-back of preamp audio and external monitor audio, the MM-1 is at home in the most complex broadcast remotes, theatrical productions, and intercom setups.

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

Specification
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)