Sound Devices MM-1 Bruksanvisning
Sound Devices
Mixerkonsol
MM-1
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MM-1
Microphone Preamplifier
with Headphone Monitor
User Guide and Technical Information
Sound Devices, LLC
E7556 State Rd. 23/33 • Reedsburg, WI • USA
+1 (608) 524-0625 • fax: +1 (608) 524-0655
Toll-Free: (800) 505-0625
www.sounddevices.com
support@sounddevices.com
MM-1 User Guide and Technical Information
2
Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.
Sound Devices MM-1 combines a high-performance microphone preamplifier with a flexible
headphone monitor.
The full-featured, transformer-balanced microphone preamp produces low-noise, low-distortion
gain at all switch positions. Its dual-stage limiter and high-pass filter prevent occasional signal
extremes from overloading down-stream equipment.
The MM-1 is at home in a range of applications—film sound (boom operators), high-definition
television production, corporate/industrial environments, radio/television announce booths, and
music production. With its headphone monitoring function the MM-1 is a benefit in applications
where communications channels and 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 for durability. Its extruded aluminum chassis, rugged end panels, machined
knobs, and panel mounted connectors assure reliable mechanical operation.
High Performance Microphone Preamplifier
• Maximum of 66 dB of gain, in eleven discrete steps for accurate, repeatable gain settings.
• Dynamic range exceeding 120 dB
• 10 Hz to 50 kHz audio bandwidth.
• High immunity to RF interference due to transformers, RF filtering, and all-metal construction
• High current line output driver capable of driving very long cable runs.
• Premium Lundahl input transformer with superior sonic quality and freedom from interference prob-
lems.
• Extended range peak limiter via dual opto-isolators makes preamplifier virtually “unclippable”.
• Selectable 48-volt / 12-volt phantom power or 12-volt T-power for condenser microphones.
• High-pass filter with two selectable corner frequencies, 80 and 160 Hz, 6 dB per octave.
Headphone Monitoring
• Headphone monitoring of microphone audio, external monitor audio, or a mix of both.
• Monitor input accepts balanced or unbalanced mono line-level inputs on 1/4-inch tip-ring-sleeve connec-
tor.
• Separate level control of Monitor gain and overall headphone gain.
• Split ear function via DIP switches.
Portable
• Internal battery power (two-AA) for convenient, low cost power.
• Excellent battery life with alkaline or lithium primary cells.
• External 5–17 VDC powering (plug included).
Durable Mechanical Construction
• High strength aluminum chassis withstands punishing field conditions.
• Panel-mounted connectors for strength and reliability.
• Easy access battery compartment for quick battery changes.
• Durable belt clip and end panels.
MM-1 User Guide and Technical Information
3
Gain: (Mic to Line) 0 dB to 66 dB input to output, switch selectable
Gain Accuracy (Mic - Line) +0.6, –0.1 dB with reference to front panel gain markings
(150 ohm source, 100k ohm load impedances)
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)
MM-1 Frequency
Response
-- w/80 Hz HP
·· w/160 Hz HP
-6
+1
-5
-4
-3
-2
-1
+0
d
B
u
10 100k20 50 100 200 500 1k 2k 5k 10k 20k 50k
Hz
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)
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
Dynamic Range: (Mic to Line) 122 dB minimum at the +18 dB gain setting
THD + Noise: .05% maximum (from 50 Hz – 22 kHz @ +4 dBu output level, 22 Hz – 22 kHz filter bandwidth,
+46 dB gain setting
Common Mode Rejection Ratio: 100 dB minimum at 80 Hz
60 dB minimum at 10 kHz
Input (Mic): Transformer-balanced, 2k ohm input impedance
Input: (Monitor) Electronically-balanced, 22k ohm input impedance
Output: (Line) Transformer-balanced, 130 ohm output impedance
Headphone Output Impedance: Unbalanced, 200 ohms
Frequency Response: (Monitor In) 10 Hz – 50 kHz, ±0.5 dB, gain at 50 %
Frequency Response (headphones): 10 Hz – 50 kHz, ±0.5 dB, gain at 50%
Input Clipping Level: (Monitor In) Greater than +30 dBu
High-Pass Filter: 80 Hz or 160 Hz (switch selectable), 6 dB per octave
Phantom Power: 12 V or 48 V (switch selectable), will supply 10 mA per DIN 45 596 specification
T-Power: 12 V via 180 ohm resistors, will supply 10 mA
Limiter: Limits to +17 dBu output level, 10:1 limiting ratio
5 ms attack time, 100 ms release time
Amber/Red LED indicates limiting/clipping
Internal Voltage Rails: ±15 V, regulated
Power: Internal: 2 x AA batteries
External: 5–17 VDC via threaded coaxial jack, (5.5 mm outer diameter, 2.1 mm inner diameter),
pin positive, sleeve negative.
Voltages above 17 VDC cause no damage to unit but will open an internal poly fuse. Poly fuse will
reset when voltage is removed.
Polarity: All inputs to all outputs are non-inverting
XLR – pin-2 = hot, pin-3 = cold, pin-1 is ground
TRS – Tip = hot, ring = cold, sleeve = ground
Weight: (unit only) 0.64 kg, 1.42 lbs.
Dimensions: (unit only) 49 mm x 95 mm x 166 mm (h x w x d)
(1.95” x 3.75” x 6.55”)
Included Accessories: Mating DC coaxial power connector, 4 rubber feet
Produktspecifikationer
| Varumärke: | Sound Devices |
| Kategori: | Mixerkonsol |
| Modell: | MM-1 |
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