MM-1
Sound Devices
MM-1
Sound Devices MM1 Headphone Amplifier
This single-channel, portable microphone preamplifier with powerful headphone monitoring function is highly versatile and portable. 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.
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.
Product Weight: 1.1 lb
Dimensions: 1.95"H x 3.75"W x 6.55"D
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Manufacturer Specs
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
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