MM-1 User Guide and Technical Information
Contents
1. MIC LINE IN OUT oe AI T ay 3 k Se 17 LIM S2 B S3 B PHONES pe a aaa PHONES lau MON GAIN 33A Front Panel Controls and Connectors A PREAMP GAIN dB me A E 46 o MONITOR PHONES I 1 MEg Preamp Gain Switch Rotary Selects the amount of gain from input to output adjustable in 11 increments High Pass Filter Switch Three position switch inserts an 80 Hz or 160 Hz corner frequency filter 6 dB per octave Off position removes the filter from the signal path Limiter Switch Activates the peak limiter Limits to 17 dBu output Limiter Peak LED Bi color LED illuminates red at 3 dB below clipping illuminates amber to indicate limiter activity Monitor In Gain Controls the level of Monitor Input signal 0 00 Phones Gain Controls the overall headphone monitor level of both preamp audio and monitor audio Headphone Connector 1 4 inch TRS mono headphone output microphone audio and or monitor audio in headphones Power LED Bi color LED illuminates green when the unit is powered and changes to red when approximately four hours of battery life remain Power Switch Selects the power source for the unit either Internal battery or External power a Features and specifications are subject to change Visit www sounddevices com for the latest documentation MM 1 User Guide and Technical Information Back Panel Controls2. 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 Ibs 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 SOUNDSDEVICES MM 1 User Guide and Technical Information Block Diagram PREAMP GAIN
3. Hz 50 kHz EN55103 2 Phenomena 3 1997 Magnetic immunity 50 Hz to 10 kHz CISPR 22 EN55022 2003 Radiated and conducted emissions Class B EN61000 4 2 2001 IEC61000 4 2 2001 ESD 4 kV contact 8 kV air discharge EN61000 4 3 2001 IEC1000 4 3 2001 Radiated RF immunity 10 V m 80 1 kHz amplitude modulation EN61000 4 4 2001 IEC61000 4 4 2001 AC power ports EFT Burst I O lines 0 25 kV to 1 0 kV power line 0 5 kB 1 kV EN61000 4 4 2001 IEC61000 4 4 2001 EFT Burst I O lines 0 25 kV to 1 0 kV power line 0 5 kB 1 kV EN61000 4 5 2001 TEC61000 4 5 2001 Surge 1 kV differential mode line to line 2 kV common mode line to ground EN61000 4 6 2001 IEC61000 4 6 2001 EN61000 4 11 2002 IEC61000 4 11 2001 Conducted RF immunity 3 V 80 1 kHz amplitude modulation Voltage dips and short interruptions at test voltage level 0 V unominal 70 V unominal 25 period Tested by L S Compliance Inc Cedarburg Wisconsin February 15 2003 M Matthew Anderson Director of Engineering Sound Devices LLC 10 Features and specifications are subject to change Visit www sounddevices com for the latest documentation MM 1 User Guide and Technical Information FCC Statement This device has been tested and found to comply with the limits for a class B digital device pursuant to part 15 of the FCC rules These limits
4. and Connectors 1 2 3 Line Out Transformer balanced line level output 22 dBu peak output level Mic In Transformer balanced XLR input accepts microphone level signals Balanced Monitor Input Active balanced 14 inch connector accepts balanced or unbalanced line level signals from 10 dBu to 24 dBu Phantom Voltage Switch Selects phantom voltages between 48 V or 12 V for mic powering Bottom Panel Switches BALANCED MON IN F 5 N Gy Microphone Power Switch Three position switch selects Phantom power T power 12 Volts or no power DYN position WARNING Do not use T powering with phantom powered or dynamic microphones see Microphone Powering Battery Compartment Requires two AA batteries for operation Insert positive end of battery first External DC Input Connector Accepts 5 17 VDC pin sleeve 1 The bottom panel switches are accessible when the belt clip is removed Use a 1 16 inch allen head wrench DIP Switches The Split Ear setting allows the a signal to be sent to the left headphone earpiece and a monitor signal to be sent to the right earpiece Also S2 B can mute the mic audio to the headphones SOUNDSDEVICES MM 1 User Guide and Technical Information Operational Notes Transformers The isolation characteristics of transformers are superior to any other balancing technique particula
5. by the one switch the first limiter keeps the input gain stage from clipping and the second limiter limits the output to 17 dBu The two limiters enable the MM 1 to limit in excess of 50 dB meaning that it is very difficult to clip the unit no matter the gain setting The Limiter LED on the front panel illuminates amber in proportion to the amount of limiting 6 Features and specifications are subject to change Visit www sounddevices com for the latest documentation MM 1 User Guide and Technical Information Headphone Monitoring With headphones connected to the front panel headphone jack the MM 1 can be used to monitor either microphone audio monitor audio or a mix of both signals The Phones level controls the overall headphone volume The Monitor Gain adjusts the level of the monitor input signal The MM 1 is capable of driving headphones to dangerously high levels Take precautions to prevent hearing damage Battery Life Several factors affect battery life including battery chemistry ambient temperature of operation microphone powering and headphone drive levels Experimentation is recommended to determine battery life for each individual setup Nickel cadmium batteries are not recommended in the MM 1 These batteries have low energy per cell versus other types and provide very short operation Battery Type Operational Characteristics Battery Life Duracell AA MN 1500 powered idle 2
6. has level control in the headphones of their overall audio level and the level of the mix minus feed Podium Microphones Often podium microphones have long cable runs and see multiple audio consoles Using an MM 1 between podium microphones and mixing consoles provides needed isolation for the microphone Because the MM 1 has transformer coupling for both inputs and outputs the potential for ground loops is substantially reduced Driving line level signals to mixing consoles and powering microphones locally greatly improves the reliability and audio quality of a podium mic feeds The microphone is connected directly to the MM 1 which provides gain microphone power filtering and limiting In addition the microphone signal can be verified using the headphone output of the MM 1 SOUND DEVICES 9 MM 1 User Guide and Technical Information CE Declaration of Conformity According to ISO IEC Guide 22 Sound Devices LLC 300 Wengel Drive Reedsburg WI 53959 USA declares that the product MM 1 is in conformity with and passes EN55103 1 1997 EMC product family standard for audio video audio visual and enter tainment lighting control apparatus for professional use Part 1 Emissions EN55103 2 1997 EMC product family standard for audio video audio visual and enter tainment lighting control apparatus for professional use Part 2 Immunity EN55103 1 Phenomena 2 3 1997 Magnetic emissions at 1 meter 50
7. presence of phantom power nor will it draw any current However it is good practice to turn phantom power off if the microphone cable is suspect Poor or incorrectly wired microphone cable can cause audible artifacts in the microphone signal Phantom is an excellent cable tester T powering is a specific powering topology needed only for T powered microphones T power electrically is 12 volts applied to pin 2 with respect to pin 3 of the XLR connector Because of the voltage differential of T power it is incompatible with dynamic or phantom powered microphones and can permanently damage dynamic and phantom powered mics High Pass Filter The two positions of the high pass filter low cut in the MM 1 are useful for removing excess low frequency energy in the audio signals The 80 Hz position is appropriate when recording general speech music and ambient sound The 160 Hz position is useful to enhance speech clarity The high pass filter is a single pole design 6 dB per octave When possible attempt to equalize at the sound source with microphone selection use of a windscreen microphone placement and onboard microphone filtering A high pass filter on the microphone and a high pass filter on the MM 1 will give an additive effect increasing the slope of the filter Limiter The MM 1 has a built in peak responding limiter which can be turned on or off by the front panel switch The MM 1 limiter is two separate limiters circuits activated
8. 0 hrs Duracell AA MN 1500 dynamic microphone 4 dBu output 75 14 hrs ohm headphones at moderate level Duracell AA MN 1500 condenser microphone 48V 75 ohm head 8 hrs phones at high levels 2000 mAh NiMH AA dynamic microphone 4 dBu output 75 17 hrs ohm headphones at moderate level Test conditions 70 F SOUNDSDEVICES MM 1 User Guide and Technical Information Application Notes Line Driving Mic Checking Audio from remote microphones located more than 100 meters from a mixing console improve when sending line level signals to the mix position Long cable runs at microphone level are more prone to noise and interference than line level signals Phantom voltages can also drop over long cable runs resulting in problems at the microphone The MM 1 can be used to step microphone signals to line level provide power to microphones transformer isolate grounds and to verify microphone audio in headphones Wireless Boom Operator The MM 1 can be used to allow a boom operator to have an un tethered connection to a production van or mix position The microphone is connected directly to the MM 1 and the boom op can hear microphone audio directly in headphones The MM 1 is used to power the microphone and provide gain The output of the MM 1 is connected to a body pack wireless transmitter A two way radio s earpiece output is connected to the monitor input of the MM 1 Via the two way the boom opera
9. SOUNDS DEVICES MM I Microphone Preamplifier with Headphone Monitor User Guide and Technical Information Sound Devices LLC 300 Wengel Drive 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 General Description 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 Features High Performance Microphone Preamplifier Maximum of 66 dB of gain in eleven disc
10. are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation Warranty Sound Devices LLC warrants the MM 1 Microphone Preamp with Headphone Monitoring against defects in materials and workmanship for a period of ONE 1 year from date of original retail purchase This is a non transferable warranty that extends only to the original purchaser Sound Devices LLC will repair or replace the product at its discretion at no charge Warranty claims due to severe service conditions will be addressed on an individual basis THE WARRANTY AND REMEDIES SET FORTH ABOVE ARE EXCLUSIVE SOUND DEVICES LLC DISCLAIMS ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE SOUND DEVICES LLC IS NOT RESPONSIBLE FOR SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING FROM ANY BREACH OF WARRANTY OR UNDER ANY OTHER LEGAL THEORY Because some jurisdictions do not permit the exclusion or limitations set forth above they may not apply in all cases For all service including warranty repair please contact Sound Devices for a return authorization number RMA before sending th
11. e unit for service Service returns should be sent to Sound Devices LLC Service Repair RMA XXXX 300 Wengel Drive Reedsburg WI 53959 USA telephone 608 524 0625 SOUNDS DEVICES x SOUND DEVICES
12. pecifications are subject to change Visit www sounddevices com for the latest documentation Specifications MM 1 User Guide and Technical Information 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 PE w 160 Hz HP 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
13. rete 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 e Selectable 48 volt 12 volt phantom power or 12 volt T power for condenser microphones e High pass filter with two selectable corner frequencies 80 and 160 Hz 6 dB per octave Headphone Monitoring e Headphone monitoring of microphone audio external monitor audio or a mix of both e Monitor input accepts balanced or unbalanced mono line level inputs on 1 4 inch tip ring sleeve connec tor e Separate level control of Monitor gain and overall headphone gain e Split ear function via DIP switches Portable e Internal battery power two AA for convenient low cost power e Excellent battery life with alkaline or lithium primary cells e 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 a Features and s
14. rly for the adverse and uncontrolled environments of field production Transformers provide galvanic isolation from the driving source meaning there is no direct electrical connection Signals are transformed magnetically Both transformers in the MM 1 use premium magnetic core material to achieve high signal handling capability especially at low frequencies while keeping distortion to a minimum Because of their inherently high common mode impedance transformers are unrivaled by any other type of input for common mode noise rejection Both the microphone input and line output of the MM 1 can be balanced or unbalanced without problems When unbalancing either input or output ground pin 3 to pin 1 There is no change in gain with an unbalanced connection into or out of the MM 1 Microphone Powering Microphones requiring phantom power should use the lowest voltage acceptable to maximize battery life Most electret condenser microphones can operate on phantom voltages from 11 52 volts There is typically no performance benefit to using 48 volt therefore 12 volt phantom is appropriate Some microphones which require 48 volt phantom will not operate or may operate with lower headroom and increased distortion at 12 volts therefore use 48 volt phantom Consult your microphone documentation for the appropriate voltage Dynamic microphones do not require phantom power A properly connected balanced dynamic microphone will not be affected by the
15. tor receives director s cues The MM 1 allows the user to control monitoring levels of the comm feed and the microphone signal in headphones without affecting the microphone signal sent to the wireless transmitter NB MONITOR PHONES oF oF O INT EXT ey LIM MM 1 Boom Operator 8 Features and specifications are subject to change Visit www sounddevices com for the latest documentation MM 1 User Guide and Technical Information Radio Television Announcer Position The MM 1 is used as a microphone preamplifier for an announcer s microphone and can pass a mix minus headphone feed to the announcer Sending a line level signal from the announcer position to the main mixing console is preferred over sending a mic level signal When engaged the limiter prevents distortion during shouting and high microphone signal levels MONITOR PHONES IN 1 A PRERI GAN TEB 3 GAI a s oes w ow Se FA y oF oF O O mra VOAS LIM MM 1 POWER y Announcer announce t 000000 t ocoo00o0 0 00000 OQ 000000 MIXING CONSOLE a F 000000 mix minus t 9000000 In the set up above the announcer
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