Sound Devices MM-1
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.
Maximum of 66 dB of gain, in eleven discrete stepsDynamic range exceeding 120 dB10 Hz to 50 kHz audio bandwidthHigh immunity to RF interferenceHigh current line output driverTransformer-balanced input and outputExtended range peak limiter via dual opto-isolators makes preamplifier virtually "unclippable"Selectable 48-volt / 12-volt phantom power or 12-volt "T" powerHigh-pass filter @ 80 or 160 Hz, 6 dB per octaveHeadphone monitoring of microphone audio, monitor audio, or a mix of bothMonitor input accepts mono, balanced or unbalanced line-level inputs on 1/4-inch tip-ring-sleeve connectorSeparate level control of Monitor gain and overall headphone gainSplit ear function via DIP switchesInternal battery power (two-AA)Excellent battery life with alkaline and NiMH rechargeable batteriesExternal 5-17 VDC powering (plug included)High-strength aluminum chassis with durable belt clip
(Mic - Line): 0 dB to 66 dB input to output, switch selectable
(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)
(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
(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 Hz, 60 dB minimum at 10 kHz
0.7 kg (1.1 lbs)
49 mm x 95 mm x 166 mm, 1.95" x 3.75" x 6.55" (h x w x d)
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