mlm82s mixer manual
TRANSCRIPT
MLM82SMIC & LINE MIXER
CONTENTS (in order of appearance)
Important Safety InstructionsMLM82S ManualMLM82S Data SheetSound System InterconnectionRane Professional Audio ProductsSchematicsWarrantyDeclaration of Conformity
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ATTENTION: RISQUE DE CHOCS ELECTRIQUE - NE PAS OUVRIR
RISK OF ELECTRIC SHOCKDO NOT OPEN
CAUTION
To reduce the risk of electrical shock, do not open the unit. No user serviceable parts inside. Refer servicing to qualified service personnel.
The symbols shown below are internationally accepted symbols that warn of potential hazards with electrical products.
This symbol indicates that a dangerous voltage constituting a risk of electric shock is present within this unit.
This symbol indicates that there are important operating and maintenance instructions in the literature accompanying this unit.
WARNING
IMPORTANT SAFETY INSTRUCTIONS1. Read these instructions.2. Keep these instructions.3. Heed all warnings.4. Follow all instructions.5. Do not use this apparatus near water.6. Clean only with a dry cloth.7. Do not block any ventilation openings. Install in accordance with manufacturer’s instructions. 8. Do not install near any heat sources such as radiators, registers, stoves, or other apparatus (including amplifiers) that produce heat.9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A
grounding-type plug has two blades and a third grounding prong. The wide blade or third prong is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord and plug from being walked on or pinched particularly at plugs, convenience receptacles, and the point where it exits from the apparatus.
11. Only use attachments and accessories specified by Rane.12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution
when moving the cart/apparatus combination to avoid injury from tip-over. 13. Unplug this apparatus during lightning storms or when unused for long periods of time.14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power supply
cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
15. The plug on the power cord is the AC mains disconnect device and must remain readily operable. To completely disconnect this apparatus from the AC mains, disconnect the power supply cord plug from the AC receptacle.
16. This apparatus shall be connected to a mains socket outlet with a protective earthing connection.17. When permanently connected, an all-pole mains switch with a contact separation of at least 3 mm in each pole shall be incorporated in the
electrical installation of the building. 18. If rackmounting, provide adequate ventilation. Equipment may be located above or below this apparatus, but some equipment (like large power
amplifiers) may cause an unacceptable amount of hum or may generate too much heat and degrade the performance of this apparatus.19. This apparatus may be installed in an industry standard equipment rack. Use screws through all mounting holes to provide the best support.WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. Apparatus shall not be exposed to dripping
or splashing and no objects filled with liquids, such as vases, shall be placed on the apparatus.
NOTE: This equipment 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 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. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:• Reorient or relocate the receiving antenna.• Increase the separation between the equipment and receiver.• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.• Consult the dealer or an experienced radio/TV technician for help.CAUTION: Changes or modifications not expressly approved by Rane Corporation could void the user's authority to operate the equipment.
CAN ICES-3 (B)/NMB-3(B)
WARNING: This product may contain chemicals known to the State of California to cause cancer, or birth defects or other reproductive harm.
ATTENTION: RISQUE DE CHOCS ELECTRIQUE - NE PAS OUVRIR
RISK OF ELECTRIC SHOCKDO NOT OPEN
CAUTION
Afin d’éviter tout risque de choc électrique, ne pas ouvrir l’appareil. Aucune pièce ne peut être changée par l’utilisateur. Contactez un SAV qualifié pour toute intervention.
Les symboles ci-dessous sont reconnus internationalement comme prévenant tout risque électrique.
Ce symbole indique que cette unité utilise un voltage élevé constituant un risque de chocélectrique.
Ce symbole indique la présence d’instructions d’utilisation et de maintenance importantes dans le document fourni.
ATTENTION
INSTRUCTIONS DE SÉCURITÉ1. Lisez ces instructions.2. Gardez précieusement ces instructions.3. Respectez les avertissements.4. Suivez toutes les instructions.5. Ne pas utiliser près d’une source d’eau.6. Ne nettoyer qu’avec un chiffon doux.7. N’obstruer aucune évacuation d’air. Effectuez l’installation en suivant les instructions du fabricant.8. Ne pas disposer près d’une source de chaleur, c-à-d tout appareil produisant de la chaleur sans exception.9. Ne pas modifier le cordon d’alimentation. Un cordon polarisé possède 2 lames, l’une plus large que l’autre. Un cordon avec tresse de masse possède
2 lames plus une 3è pour la terre. La lame large ou la tresse de masse assurent votre sécurité. Si le cordon fourni ne correspond pas à votre prise, contactez votre électricien.
10. Faites en sorte que le cordon ne soit pas piétiné, ni au niveau du fil, ni au niveau de ses broches, ni au niveau des connecteurs de vos appareils.11. N’utilisez que des accessoires recommandés par Rane.12. N’utilisez que les éléments de transport, stands, pieds ou tables spécifiés par le fabricant ou vendu avec l’appareil. Quand vous utlisez une valise de
transport, prenez soin de vous déplacer avec cet équipement avec prudence afin d’éviter tout risque de blessure.13. Débranchez cet appareil pendant un orage ou si vous ne l’utilisez pas pendant un certain temps.14. Adressez-vous à du personnel qualifié pour tout service après vente. Celui-ci est nécessaire dans n’importe quel cas où l’appareil est abimé : si le
cordon ou les fiches sont endommagés, si du liquide a été renversé ou si des objets sont tombés sur l’appareil, si celui-ci a été exposé à la pluie ou l’humidité, s’il ne fonctionne pas correctement ou est tombé.
15. La fiche du cordon d’alimentation sert à brancher le courant alternatif AC et doit absolument rester accessible. Pour déconnecter totalement l’appareil du secteur, débranchez le câble d’alimentation de la prise secteur.
16. Cet appareil doit être branché à une prise terre avec protection.17. Quand il est branché de manière permanente, un disjoncteur tripolaire normalisé doit être incorporé dans l’installation électrique de l’immeuble.18. En cas de montage en rack, laissez un espace suffisant pour la ventilation. Vous pouvez disposer d’autres appareils au-dessus ou en-dessous de celui-
ci, mais certains (tels que de gros amplificateurs) peuvent provoquer un buzz ou générer trop de chaleur au risque d’endommager votre appareil et dégrader ses performances.
19. Cet appareil peut-être installé dans une baie standard ou un chassis normalisé pour un montage en rack. Visser chaque trou de chaque oreille de rack pour une meilleure fixation et sécurité.
ATTENTION: afin d’éviter tout risque de feu ou de choc électrique, gardez cet appareil éloigné de toute source d’humidité et d’éclaboussures quelles qu’elles soient. L’appareil doit également être éloigné de tout objet possédant du liquide (boisson en bouteilles, vases,…).
REMARQUE: Cet équipement a été testé et approuvé conforme aux limites pour un appareil numérique de classe B, conformément au chapitre 15 des règles de la FCC. Ces limites sont établis pour fournir une protection raisonnable contre tout risque d’interférences et peuvent provoquer une énergie de radiofréquence s'il n'est pas installé et utilisé conformément aux instructions, peut également provoquer des interférences aux niveaux des équipements de communication. Cependant, il n'existe aucune garantie que de telles interférences ne se produiront pas dans une installation particulière. Si cet équipement provoque des interférences en réception radio ou télévision, ceci peut être detecté en mettant l'équipement sous/hors tension, l'utilisateur est encouragé à essayer de corriger cette interférence par une ou plusieurs des mesures suivantes:• Réorienter ou déplacer l'antenne de réception.• Augmenter la distance entre l'équipement et le récepteur.• Connecter l'équipement à une sortie sur un circuit différent de celui sur lequel le récepteur est branché.• Consulter un revendeur ou un technicien radio / TV expérimenté.ATTENTION: Les changements ou modifications non expressément approuvés par Rane Corporation peuvent annuler l'autorité de l'utilisateur à manipuler cet équipement et rendre ainsi nulles toutes les conditions de garantie.
CAN ICES-3 (B)/NMB-3(B)Cartons et papier à recycler.
Manual-1
MLM82SMIC & LINE MIXER
OPERATORS MANUAL
MLM82S CONNECTIONWhen connecting the MLM82S to other components in your system for the first time, leave the power cord for last. This gives you a chance to make mistakes and correct them without damage to your fragile speakers, ears and nerves.
MIC/LINE INPUTS 1-4The four XLR jacks provided on the MLM82S are balanced MIC/LINE inputs. They will also accept unbalanced connectors. Use only shielded cable for inputs. For best noise rejection use two-conductor-plus-shielded wire, even for unbalanced operation. Connect the shield at both ends to help insure proper grounding. See the Sound System Interconnection RaneNote included with this manual for all cable adaptations. Rane follows the AES recommended practice of pin 2 positive, pin 3 negative, and pin 1 to shield. Switch any input connected to a microphone to the MIC position (out) using the associated switches on the rear panel. When connecting line level signals, switch the input to the LINE position (in). A single phantom power switch is provided for the four MIC inputs. If LINE is selected, Phantom Power is disabled for that input.
QUICK STARTThis section is provided as a convenience for those in a rush. If you are experienced with this unit or other Rane products, these few words will refresh your memory.
INPUTS 1 through 4 may be microphone or line level. The choice between the two is made by setting the LINE push buttons on the REAR of the unit next to the MIC/LINE INPUT JACKS. Each microphone input may be assigned to A, B or A+B outputs using the front panel ASSIGN switches.
INPUTS 5 through 8 are stereo line inputs which may be set to mono using the recessed MONO switches located on the front panel.
Internal switches allow setting output signal levels for MIC or LINE. The factory default setting is LINE. If the MLM82S is connected directly to a power amplifier, equalizer or recorder input, choose LINE level. If the MLM82S is connected to a microphone jack of an existing sound system, choose MIC level.
Once Inputs, Outputs, and power are properly connected, with the OUTPUT LEVELS counterclockwise (off ), set the Input LEVELS as high as possible without causing the SIG/OL indicators to blink red except during extreme signal peaks. Now slowly raise the OUTPUT LEVELS as desired.
STEREO LINE INPUTS 5-8The ¼" connectors are line-level balanced/unbalanced Inputs. If the MLM82S is to be used with unbalanced sources, consult the Sound System Interconnection RaneNote included with this manual for proper wiring. Stereo Inputs use both A and B jacks at each INPUT. INPUTS 5 through 8 also serve as mono Inputs when the front panel MONO switch is engaged.
OUTPUTSThe MLM82S’s OUTPUTS are balanced. The same wiring conventions as the XLR Inputs apply. The type of device follow-ing the MLM82S must be considered when setting the internal Output Level switch. Choose between LINE (0 dB) or MIC (-40 dB) output, the factory setting is LINE. If the MLM82S is con-nected directly to a power amplifier input, choose LINE level. If the MLM82S is connected to a microphone jack on an existing sound system, choose MIC level. For unbalanced OUTPUT connections do not tie pin 3 (i.e. “–”) to ground.
WEAR PARTS: This product contains no wear parts.
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MLM82SMIC / LINE MIXER
POWER
OUTPUTS1
MONO MIC / LINE INPUTS5
STEREO LINE INPUTS
OLA+B
ASSIGNMONO
SIG /OL
2
A+BASSIGNSIG /OL
3
A+BASSIGNSIG /OL
4 6
MONO
7
MONO
8
MONO
A
OL
B
A+BASSIGNSIG /OL LEVELLEVELLEVELLEVELLEVELLEVELLEVELLEVELLEVELLEVEL
Manual-2
FRONT PANEL DESCRIPTION
1 SIGnal present/OverLoad LED. This bi-color LED lights green for a -30 dBu signal, and turns red when the Input is within 3 dB of clipping.
2 MONO MIC/LINE INPUT LEVEL controls 1-4 determine the MIC/LINE preamp gain and mix level to be assigned to the A, A+B, B Outputs.
3 ASSIGN switches determine between the A, A+B or B Outputs for each MIC/LINE input. 4 STEREO LINE INPUT LEVEL controls 5-8 determine the amount of stereo or mono line Input routed to the Outputs.
5 MONO switch mixes the A and B sides of each STEREO LINE input together. When active, the associated LED lights, and the A and B Inputs for that channel have exactly the same level. 6 OUTPUT OverLoad LED illuminates within 3 dB of an approaching overload condition. To avoid this, the associated OUT-
PUT LEVEL control may be decreased, or the problem-causing individual Input Level may be lowered. 7 A and B OUTPUT LEVEL controls set the Output Level for A and B outputs. 8 POWER LED is lit whenever adequate power is applied to the unit.
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MLM82SMIC / LINE MIXER
POWER
OUTPUTS1
MONO MIC / LINE INPUTS5
STEREO LINE INPUTS
OLA+B
ASSIGNMONO
SIG /OL
2
A+BASSIGNSIG /OL
3
A+BASSIGNSIG /OL
4 6
MONO
7
MONO
8
MONO
A
OL
B
A+BASSIGNSIG /OL LEVELLEVELLEVELLEVELLEVELLEVELLEVELLEVELLEVELLEVEL
2 3 4 51 7 86
Manual-3
REAR PANEL DESCRIPTION
1 MIC/LINE INPUTS 1 through 4. These XLRs connect either balanced Microphone or Line signals, depending on the LINE switch setting (see 3). Rane adheres to the international and U.S. standard for balanced pin configurations: Pin 1 is chassis ground (neutral), pin 2 is positive (+), and pin 3 is negative (–).
2 PHANTOM POWER switch applies 15 V Phantom Power to any Inputs 1-4 that are set for MIC Input.
3 LINE Input selectors switch the sensitivity and input impedance for either a microphone or line level input. If LINE is chosen, Phantom Power is deactivated for that Input.
4 ¼" LINE INPUTS. These stereo pairs of balanced inputs accommodate stereo line-level signals. These TRS (Tip-Ring-Sleeve) ¼" jacks handle either balanced or unbalanced signals. In most cases an unbalanced signal may use a mono ¼" plug (Tip-Sleeve). See the Sound System Interconnection RaneNote included with this manual for proper connection.
5 A and B OUTPUT jacks. These balanced XLR’s provide the A and B mixed output. INTERNAL OUTPUT LEVEL switches allow setting the output level for MIC or LINE level. Pin connections are the same as above in 1.
6 Power connector: The internal universal switching power supply operates on any AC mains 100 to 240 VAC, 50 or 60 Hz (most places in the world). All that is required when traveling is the appropriate IEC line cord.
B LINE
RANE CORPORATIONA
LINE LINE LINE
15VPHANTOM
POWER
MLM82S
5
B
A
6
B
A
7
B
A
8AB
OUTPUTS
134 2
LINE INPUTS MIC / LINE INPUTS
BALANCED: PIN 3 = (–), PIN 2 = (+), PIN 1 = (G)CLASS 2 WIRING
BALANCED: PIN 3 = (–), PIN 2 = (+), PIN 1 = (G), CLASS 2 WIRING
100-240 V50/60 Hz 7 WATTS
COMMERCIALAUDIO
EQUIPMENT24TJ
R
6 23
5 14
Manual-4
©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5000 TEL 425-355-6000 FAX 425-347-7757 WEB rane.com
OPERATING INSTRUCTIONS
MONO MICROPHONE/LINE LEVEL INPUTS 1-4The microphone preamps in the MLM82S have a combination gain trim and Level control. The LEVEL control adjusts both the input dynamic range and mix level. There is no need for the typical independent gain trim control found on most mixers. The PHANTOM POWER switch activates 15 volt Phantom Power for all Inputs selected for microphone use. With LINE selected, Phantom Power is defeated only in that Input. 15 volts is suffi-cient power for all but the most esoteric condenser microphones. If in doubt, check the manufacturer’s microphone specs.
SIGNAL PRESENT/OVERLOAD INDICATORSThe MLM82S has four bi-color indicators for Signal Present/Overload (green/red). Green indication occurs when there is a signal present above -30 dBu. This lamp should be glowing green when signal is present. If this lamp is off, check these possibili-ties:A. The Input may not be connected.B. There is little or no signal present at the moment.C. There is a Mic connected to a channel switched to LINE.D. The Mic needs Phantom Power (See Rear Panel, 2).E. The LEVEL control needs to be increased (clockwise).F. The cable is not wired properly (See the Sound System Inter-
connection RaneNote).
A red glowing LED indicates that the levels are so high that distortion due to clipping is occurring or imminent.
Check these conditions:A. The LEVEL control may be turned too high.B. The Output of the preceding device may need to be reduced.C. The Input may be switched to MIC with a line-level source.
Switch the Input to LINE.
STEREO LINE INPUTS 5 through 8 do not have overload indicators. Because 12 dB of gain is added after the STEREO LINE INPUT LEVEL controls, it is possible to overload a line input without an overload indication. The A and B OUTPUT OL indicators can overload from the Line Inputs if the OUT-PUT LEVEL controls are set to 10. Although a single Input may be at unity gain, multiple active Inputs mixed together can cause an overload. If the OL indicators illuminate, just turn down the OUTPUT LEVELS until the overload stops—mix ratios will not change.
STEREO LINE LEVEL INPUTS 5-8The STEREO LINE INPUT LEVEL controls adjust both A and B Inputs equally. Use the OUTPUT LEVEL controls together for overall output adjustment, or separately to control balance.
A single mono input may be used for the A and/or B inputs. Any mono source connected to A will go to the A output. Any mono source connected to the B input will go to the B output. If you wish one or two mono sources to go to both A and B outputs, press the MONO switch. If you wish to mono a single stereo source and have it present in A and B outputs, press the mono switch. STEREO LINE INPUTS 5-8 may each be inde-pendently set for mono operation.
MLM82SMIC & LINE MIXER
Data Sheet-1
General DescriptionThe Rane MLM82S features four balanced, studio grade, Mono Mic/Line Inputs with XLR jacks and 15 VDC phantom power. Each of the four Mic/Line Inputs may be assigned to A, A+B or B Outputs. Independent Level/Gain Trim controls and Signal/Overload indicators are provided for each Mic/Line Input. The Phantom Power switch and the Mic/Line switches are located on the rear panel. Phantom power is removed from any Input set for Line operation.
The MLM82S also features four stereo line level inputs with 12 dB of line gain. Each Stereo Line Input features a recessed Mono switch with indicator and Level control. These Inputs may also be used with four Mono A Inputs and four Mono B Inputs. You get the picture… this mixer is very versatile.
A and B Output Level controls set the master mix level independently for A and B Outputs. The mix amplifiers feature independent overload indicators. To correct any overload condi-tion, the entire mix can be reduced and/or individual Input Lev-els adjusted. A and B mix Outputs each have an internal switch for padding the output signal to Mic level. The factory default is Line level.
Features
• Four balanced Mic/Line Inputs (XLR) with…
• 15V Phantom Power
• Bi-Color Signal Present/Overload indicators
• Trimless Mic Stage Preamplifiers
• A / A+B / B Assign Switch
• Four Balanced Stereo Line Inputs (TRS) with…
• Independent Mono switch
• 12 dB of Line Gain
• Two balanced Outputs (XLR) with…
• Independent Overload indicators
• Independent Level controls
• Internal Pad for Mic level output
• Internal Universal Power Supply (100-240 VAC)
DATA SHEET
ApplicationsWith features like Mic/Line A / A+B / B Assign switches, inde-pendent Stereo Line Input Mono switches and additional line gain, the MLM82S is now one of the most versatile mixers in its class. It is ideal for installations requiring ease of use, compact size, low cost, high performance and security. Applications in-clude, but are not limited to, hotels, churches, conference rooms, schools and rental sound systems. The studio-grade specifications of the MLM82S allow many other applications such as sub-mixing, recording and post-production.
The Mic/Line Assign switches and independent Mono switches for each of the Stereo Line Inputs make the MLM82S a true, dual zone capable mixer, i.e., the Outputs may be thought of as two independent zones or a single stereo zone.
MLM82SMIC & LINE MIXER
Data Sheet-2
Features and Specifications
Parameter Specification Limit Units Conditions/CommentsInputs: Type Active Balanced..........Mic Connectors XLR pin 2 = (+)..........Stereo Line Connectors ¼" TRS tip=(+), ring=(–), sleeve=GNDMic / Line Input Impedance 1k / 96k 1% Ω Balanced 500+500 / 48k + 48k..........Mic Gain Range off to +60 ±1.5 dB..........Line Gain Range off to +20 ±1.5 dB..........Equivalent Input Noise -128 typ dBu 20 kHz bandwidth, 150 Ω termination..........THD & Noise 0.02 max % Gain=40 dB, +4 dBu @ 1 kHz, 80 Hz BW..........Frequency Response 30 Hz - 35 kHz -3 dB..........Maximum Input 11.9 typ dBu Minimum Gain (3 Vrms) .....@ Mic Level 38.6 typ dBu Maximum Gain (9.1 mVrms)Stereo Line Input Impedance 20k min Ω..........Gain Range off to +12 ±1 dB..........Signal-To-Noise Ratio 90 typ dB Unity gain, output @ +4 dBu, 22 kHz BW..........Frequency Response 10 Hz - 35 kHz -3 dB..........THD & Noise 0.007 max % +4 dBu at 1 kHz, 80 kHz BWOutputs: Type Active Balanced..........Connectors XLR..........Impedance 200/100 1% Ω Line level Out/Mic level Out ..........Gain Range Off to +6 ±2 dB..........Drive Level +24 dBu 600 Ω load balancedPhantom Power +15 4% VDCOutput Cable Length 1500 typ feet Line-level, <50 pF per footCrosstalk -75 @ 1 kHz max dB re +4 dBu any channel to any channelPower Supply Requirement 100 to 240 10% VAC 50/60 Hz, 7WUnit: Conformity CE, FCC, CULUSUnit: Construction All Steel..........Size 1.75"H x 19"W x 5.3"D (1U) (4.4 cm x 48.3 cm x 13.3 cm)..........Weight 4 lb (3 kg)Shipping: Size 4.25" x 20.3" x 13.75" (11 cm x 52 cm x 35 cm)..........Weight 8 lb (5 kg)
Note: 0 dBu=0.775 Vrms
MLM82SMIC & LINE MIXER
Data Sheet-3
1
2 3+-
1
23
1
23+
+–
–
1
2 3+-
1
2 3+-
1
2 3+-
+15V
MONO
MONO
MONO
MONO
OL
OL
40 dBPAD
40 dBPAD
1231 2 3
LINE MIX
LINE MIX
MASTER MIX
MASTER MIX
PHANTOM POWER
INPUT 2
INPUT 1
INPUT 3
INPUT 4
INPUT 5
INPUT 6
INPUT 7
INPUT 8
OUTPUT A
OUTPUT B
LEVEL
LEVEL
LEVEL
LEVEL
LEVEL
LEVEL
LEVEL
LEVEL
40 dBPAD
RFIFILTER
RFIFILTER
RFIFILTER
RFIFILTER
RFIFILTER
RFIFILTER
RFIFILTER
RFIFILTER
RFIFILTER
RFIFILTER
RFIFILTER
RFIFILTER
40 dBPAD
40 dBPAD
40 dBPAD
A / A+B / B
A / A+B / B
A / A+B / B
A / A+B / B
SENSEOL
SENSEOL
SENSEOL
SENSEOL
GRNSIG
REDOL
GRNSIG
REDOL
GRNSIG
REDOL
GRNSIG
REDOL
12 dB
12 dB
A
BAL/UNBAL
LINE
B
A
BAL/UNBAL
LINE
B
A
BAL/UNBAL
LINE
B
A
BAL/UNBAL
LINE
B
Block Diagram
MLM82SMIC & LINE MIXER
Data Sheet-4 All features & specifications subject to change without notice. 4-2016
©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5000 USA TEL 425-355-6000 FAX 425-347-7757 WEB rane.com
Rear Panel
Architectural SpecificationsThe mixer shall have four studio-grade mono mic/line inputs each with XLR input jack, 15 V phantom power, line pad, A / A+B / B mix assign switch, level control and signal/overload indicator. A single switch shall make phantom power available to all four microphone inputs. Phantom power shall be removed automatically from any mic/line input set for line input. For ease of use, mic/line preamplifiers shall use a single control for input gain trim and mix level.
The mixer shall feature four stereo line inputs each with ¼" TRS input jack, level control and pre-level control mono switch. The inputs shall provide for dual mono operation with four mono signals available for the A mix and four mono inputs avail-able for the B mix.
A and B mix outputs shall feature overload indicators, independent A/B level controls, internally selected 40 dB pad for microphone level output and XLR output jacks.
Security features shall include placement of the phantom power and line switches on the rear panel, recessed assign switch-es, internally located pad switch for selecting line or microphone output level and recessed stereo line input mono switches with position indicators.
The unit shall be capable of operation by means of its own built-in universal power supply operating at 100-240 VAC and meet CE requirements. The unit shall be UL and cUL listed. The unit shall be constructed entirely from cold-rolled steel, and mount into a standard EIA relay rack occupying 1 rack-space.
The unit shall be a Rane MLM82S Mic & Line Mixer.
IN 1 A / A+B / B
STEREO /MONO
IN 2IN 3IN 4
OUT “A”MIC / LINE
OUT “B”
MLM82S
“B”CONFERENCE
SEND
“A”LOCAL
AMPLIFIER
MIC1
MIC2
MIC3
MIC4
LR
LAPTOP
LR
MP3
LR
DVR
LR
DVD
Application Diagram
Interconnection-1
IntroductionThis note, originally written in 1985, continues to be one of our most useful references. It’s popularity stems from the continual and perpetual difficulty of hooking up audio equipment without suffering through all sorts of bizarre noises, hums, buzzes, whistles, etc.— not to mention the extreme financial, physical and psychological price. As tech-nology progresses it is inevitable that electronic equipment and its wiring should be subject to constant improvement. Many things have improved in the audio industry since 1985, but unfortunately wiring isn’t one of them. However, finally the Audio Engineering Society (AES) has issued a standards document for interconnection of pro audio equip-ment. It is AES48, titled “AES48-2005: AES standard on interconnections —Grounding and EMC practices — Shields of connectors in audio equipment containing active circuitry.”
Rane’s policy is to accommodate rather than dictate. However, this document contains suggestions for external wiring changes that should ideally only be implemented by trained technical personnel. Safety regulations require that all original grounding means provided from the factory be left intact for safe operation. No guarantee of responsibility for incidental or consequential damages can be provided. (In other words, don’t modify cables, or try your own version of grounding unless you really understand exactly what type of output and input you have to connect.)
Rane Technical Staff
RaneNote 110© 1985, 1995, 2006, 2007, 2011, 2015 Rane Corporation
Sound System Interconnection
• Cause & prevention of ground loops
• Interfacing balanced & unbalanced
• Proper pin connections and wiring
• Chassis ground vs. signal ground
• Ground lift switches
RaneNoteSOUND SYSTEM INTERCONNECTION
Interconnection-2
Ground LoopsAlmost all cases of noise can be traced directly to ground loops, grounding or lack thereof. It is important to under-stand the mechanism that causes grounding noise in order to effectively eliminate it. Each component of a sound system produces its own ground internally. This ground is usually called the audio signal ground. Connecting devices together with the interconnecting cables can tie the signal grounds of the two units together in one place through the conductors in the cable. Ground loops occur when the grounds of the two units are also tied together in another place: via the third wire in the line cord, by tying the metal chassis together through the rack rails, etc. These situations create a circuit through which current may flow in a closed “loop” from one unit’s ground out to a second unit and back to the first. It is not simply the presence of this current that creates the hum—it is when this current flows through a unit’s audio signal ground that creates the hum. In fact, even without a ground loop, a little noise current always flows through every interconnecting cable (i.e., it is impossible to eliminate these currents entirely). The mere presence of this ground loop current is no cause for alarm if your system uses properly implemented and completely balanced inter-connects, which are excellent at rejecting ground loop and other noise currents. Balanced interconnect was developed to be immune to these noise currents, which can never be entirely eliminated. What makes a ground loop current an-noying is when the audio signal is affected. Unfortunately, many manufacturers of balanced audio equipment design the internal grounding system improperly, thus creating bal-anced equipment that is not immune to the cabling’s noise currents. This is one reason for the bad reputation some-times given to balanced interconnect.
A second reason for balanced interconnect’s bad reputa-tion comes from those who think connecting unbalanced equipment into “superior” balanced equipment should improve things. Sorry. Balanced interconnect is not compat-
ible with unbalanced. The small physical nature and short cable runs of completely unbalanced systems (home audio) also contain these ground loop noise currents. However, the currents in unbalanced systems never get large enough to affect the audio to the point where it is a nuisance. Mixing balanced and unbalanced equipment, however, is an entirely different story, since balanced and unbalanced interconnect are truly not compatible. The rest of this note shows several recommended implementations for all of these interconnec-tion schemes.
The potential or voltage which pushes these noise cur-rents through the circuit is developed between the indepen-dent grounds of the two or more units in the system. The impedance of this circuit is low, and even though the voltage is low, the current is high, thanks to Mr. Ohm, without whose help we wouldn’t have these problems. It would take a very high resolution ohm meter to measure the impedance of the steel chassis or the rack rails. We’re talking thou-sandths of an ohm. So trying to measure this stuff won’t necessarily help you. We just thought we’d warn you.
The Absolute Best Right Way To Do ItThe method specified by AES48 is to use balanced lines and tie the cable shield to the metal chassis (right where it enters the chassis) at both ends of the cable.
A balanced line requires three separate conductors, two of which are signal (+ and –) and one shield (see Figure 1a). The shield serves to guard the sensitive audio lines from interference. Only by using balanced line interconnects can you guarantee (yes, guarantee) hum-free results. Always use twisted pair cable. Chassis tying the shield at each end also guarantees the best possible protection from RFI [radio fre-quency interference] and other noises [neon signs, lighting dimmers].
Neil Muncy1, an electroacoustic consultant and seasoned veteran of years of successful system design, chairs the AES
Figure 1a. The right way to do it.
+
–
G
T
RS
REDBLACK 2-CONDUCTOR SHIELDED CABLE
2-CONDUCTOR SHIELDED CABLE
2-CONDUCTOR SHIELDED CABLE
SHIELD
REDBLACKSHIELD
REDBLACKSHIELD
REDBLACK
SHIELD
REDBLACK
SHIELD
REDBLACK
SHIELD
CHASSISGROUND
CHASSISGROUND
SIGNALGROUND
SR
T
G
–
+
BALANCED OUTPUTS BALANCED INPUTS
MALE FEMALEMALE FEMALE
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13
Interconnection-3
Standards Committee (SC-05-05) working on this subject. He tirelessly tours the world giving seminars and dispens-ing information on how to successfully hook-up pro audio equipment2. He makes the simple point that it is absurd that you cannot go out and buy pro audio equipment from sever-al different manufacturers, buy standard off-the-shelf cable assemblies, come home, hook it all up and have it work hum and noise free. Plug and play. Sadly, almost never is this the case, despite the science and rules of noise-free interconnect known and documented for over 60 years (see References for complete information).
It all boils down to using balanced lines, only balanced lines, and nothing but balanced lines. This is why they were developed. Further, that you tie the shield to the chassis, at the point it enters the chassis, and at both ends of the cable (more on ‘both ends’ later).
Since standard XLR cables come with their shields tied to pin 1 at each end (the shells are not tied, nor need be), this means equipment using 3-pin, XLR-type connectors must tie pin 1 to the chassis (usually called chassis ground) — not the audio signal ground as is most common.
Not using signal ground is the most radical departure from common pro-audio practice. Not that there is any ar-gument about its validity. There isn’t. This is the right way to do it. So why doesn’t audio equipment come wired this way? Well, some does, and since 1993, more of it does. That’s when Rane started manufacturing some of its products with balanced inputs and outputs tying pin 1 to chassis. So why doesn’t everyone do it this way? Because life is messy, some things are hard to change, and there will always be equip-ment in use that was made before proper grounding prac-tices were in effect.
Unbalanced equipment is another problem: it is ever-where, easily available and inexpensive. All those RCA and ¼" TS connectors found on consumer equipment; effect-loops and insert-points on consoles; signal processing boxes; semi-pro digital and analog tape recorders; computer cards; mixing consoles; et cetera.
The next several pages give tips on how to successfully address hooking up unbalanced equipment. Unbalanced equipment when “blindly” connected with fully balanced units starts a pattern of hum and undesirable operation, requiring extra measures to correct the situation.
Figure 1b. Recommmended practice.
CASE(+)
(–)
COMMON (WRONG) PRACTICE RECOMMENDED PRACTICE
(–)
(+)OPTIONALCASE
1
2
3 3
1
2
CHASSISGROUND
SIGNALGROUND
CHASSISGROUND
CHASSISGROUND
The Next Best Right Way To Do ItThe quickest, quietest and most foolproof method to con-nect balanced and unbalanced is to transformer isolate all unbalanced connections. See Figure 2.
Many manufacturers provide several tools for this task, including Rane. Consult your audio dealer to explore the options available.
The goal of these adaptors is to allow the use of standard cables. With these transformer isolation boxes, modification of cable assemblies is unnecessary. Virtually any two pieces of audio equipment can be successfully interfaced without risk of unwanted hum and noise.
Another way to create the necessary isolation is to use a direct box. Originally named for its use to convert the high impedance, high level output of an electric guitar to the low impedance, low level input of a recording console, it allowed the player to plug “directly” into the console. Now this term is commonly used to describe any box used to convert un-balanced lines to balanced lines.
The Last Best Right Way To Do ItIf transformer isolation is not an option, special cable assemblies are a last resort. The key here is to prevent the shield currents from flowing into a unit whose grounding scheme creates ground loops (hum) in the audio path (i.e., most audio equipment).
It is true that connecting both ends of the shield is theo-retically the best way to interconnect equipment –though this assumes the interconnected equipment is internally grounded properly. Since most equipment is not internally grounded properly, connecting both ends of the shield is not often practiced, since doing so usually creates noisy interconnections.
A common solution to these noisy hum and buzz prob-lems involves disconnecting one end of the shield, even though one can not buy off-the-shelf cables with the shield disconnected at one end. The best end to disconnect is the receiving end. If one end of the shield is disconnected, the noisy hum current stops flowing and away goes the hum — but only at low frequencies. A ground-sending-end-only shield connection minimizes the possibility of high fre-quency (radio) interference since it prevents the shield from acting as an antenna to the next input. Many reduce this potential RF interference by providing an RF path through
Figure 2. Transformer Isolation
NOT CONNECTEDAT CHASSIS(PLASTIC JACK)
EARTH GROUNDEDMETAL ENCLOSURE
CHASSIS ISGROUNDED TO PIN 1
1/4”TIP-SLEEVE
CASE LUG MAYCONNECT TO CHASSIS(NOT REQUIRED)
TRANSFORMER
UNBALANCED BALANCED
3
1
2
Interconnection-4
a small capacitor (0.1 or 0.01 microfarad ceramic disc) con-nected from the lifted end of the shield to the chassis. (This is referred to as the “hybrid shield termination” where the sending end is bonded to the chassis and the receiving end is capacitively coupled. See Neutrik’s EMC-XLR for example.) The fact that many modern day installers still follow this one-end-only rule with consistent success indicates this and other acceptable solutions to RF issues exist, though the increasing use of digital and wireless technology greatly increases the possibility of future RF problems.
If you’ve truly isolated your hum problem to a specific unit, chances are, even though the documentation indicates proper chassis grounded shields, the suspect unit is not in-ternally grounded properly. Here is where special test cable assemblies, shown in Figure 3, really come in handy. These assemblies allow you to connect the shield to chassis ground at the point of entry, or to pin 1, or to lift one end of the shield. The task becomes more difficult when the unit you’ve isolated has multiple inputs and outputs. On a suspect unit with multiple cables, try various configurations on each con-nection to find out if special cable assemblies are needed at more than one point.
See Figure 4 for suggested cable assemblies for your par-ticular interconnection needs. Find the appropriate output configuration (down the left side) and then match this with the correct input configuration (across the top of the page.) Then refer to the following pages for a recommended wiring diagram.
Ground LiftsMany units come equipped with ground lift switches. In only a few cases can it be shown that a ground lift switch improves ground related noise. (Has a ground lift switch ever really worked for you?) In reality, the presence of a ground lift switch greatly reduces a unit’s ability to be “properly” grounded and therefore immune to ground loop hums and buzzes. Ground lifts are simply another Band-Aid® to try in case of grounding problems. It is true that an entire system of properly grounded equipment, without ground lift switches, is guaranteed (yes guaranteed) to be hum free. The problem is most equipment is not (both internally and externally, AC system wise) grounded properly.
Most units with ground lifts are shipped so the unit is “grounded” — meaning the chassis is connected to audio signal ground. (This should be the best and is the “safest” position for a ground lift switch.) If after hooking up your system it exhibits excessive hum or buzzing, there is an incompatibility somewhere in the system’s grounding con-figuration. In addition to these special cable assemblies that may help, here are some more things to try:
1. Try combinations of lifting grounds on units supplied with lift switches (or links). It is wise to do this with the power off!
2. If you have an entirely balanced system, verify all chassis are tied to a good earth ground, for safety’s sake and hum protection. Completely unbalanced systems never earth ground anything (except cable TV, often a ground loop source). If you have a mixed balanced and unbalanced system, do yourself a favor and use isolation transform-ers or, if you can’t do that, try the special cable assemblies described here and expect it to take many hours to get things quiet. May the Force be with you.
3. Balanced units with outboard power supplies (wall warts or “bumps” in the line cord) do not ground the chassis through the line cord. Make sure such units are solidly grounded by tying the chassis to an earth ground using a star washer for a reliable contact. (Rane always provides this chassis point as an external screw with a toothed washer.) Any device with a 3-prong AC plug, such as an amplifier, may serve as an earth ground point. Rack rails may or may not serve this purpose depending on screw locations and paint jobs.
Figure 3. Test cable
TESTWIRE
GROUND CLIP
FEMALE MALE
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23
1
23
REDBLACKSHIELD
REDBLACK
SHIELD
2-CONDUCTOR SHIELDED CABLE
Interconnection-5
Floating, Pseudo, and Quasi-BalancingDuring inspection, you may run across a ¼" output called floating unbalanced, sometimes also called psuedo-balanced or quasi-balanced. In this configuration, the sleeve of the output stage is not connected inside the unit and the ring is connected (usually through a small resistor) to the audio signal ground. This allows the tip and ring to “appear” as an equal impedance, not-quite balanced output stage, even though the output circuitry is unbalanced.
Floating unbalanced often works to drive either a bal-anced or unbalanced input, depending if a TS or TRS stan-dard cable is plugged into it. When it hums, a special cable is required. See drawings #11 and #12, and do not make the cross-coupled modification of tying the ring and sleeve together.
Winning the Wiring Wars• Use balanced connections whenever possible, with the
shield bonded to the metal chassis at both ends.• Transformer isolate all unbalanced connections from bal-
anced connections.• Use special cable assemblies when unbalanced lines can-
not be transformer isolated.• Any unbalanced cable must be kept under 10 feet
(3 m) in length. Lengths longer than this will amplify all the nasty side effects of unbalanced circuitry's ground loops.
SummaryIf you are unable to do things correctly (i.e. use fully bal-anced wiring with shields tied to the chassis at both ends, or transformer isolate all unbalanced signals from balanced signals) then there is no guarantee that a hum-free intercon-nect can be achieved, nor is there a definite scheme that will assure noise-free operation in all configurations.
References1. Neil A. Muncy, “Noise Susceptibility in Analog and Digi-
tal Signal Processing Systems,” presented at the 97th AES Convention of Audio Engineering Society in San Fran-cisco, CA, Nov. 1994.
2. Grounding, Shielding, and Interconnections in Analog & Digital Signal Processing Systems: Understanding the Basics; Workshops designed and presented by Neil Muncy and Cal Perkins, at the 97th AES Convention of Audio Engineering Society in San Francisco, CA, Nov. 1994.
3. The entire June 1995 AES Journal, Vol. 43, No. 6, available $6 members, $11 nonmembers from the Audio Engineer-ing Society, 60 E. 42nd St., New York, NY, 10165-2520.
4. Phillip Giddings, Audio System Design and Installation (SAMS, Indiana, 1990).
5. Ralph Morrison, Noise and Other Interfering Signals (Wi-ley, New York, 1992).
6. Henry W. Ott, Noise Reduction Techniques in Electronic Systems, 2nd Edition (Wiley, New York, 1988).
7. Cal Perkins, “Measurement Techniques for Debugging Electronic Systems and Their Instrumentation,” The Pro-ceedings of the 11th International AES Conference: Audio Test & Measurement, Portland, OR, May 1992, pp. 82-92 (Audio Engineering Society, New York, 1992).
8. Macatee, RaneNote: “Grounding and Shielding Audio Devices,” Rane Corporation, 1994.
9. Philip Giddings, “Grounding and Shielding for Sound and Video,” S&VC, Sept. 20th, 1995.
10. AES48-2005: AES standard on interconnections —Grounding and EMC practices — Shields of connectors in audio equipment containing active circuitry (Audio Engineering Society, New York, 2005).
Band-Aid is a registered trademark of Johnson & Johnson
Interconnection-6
Figure 4. Interconnect chart for locating correct cable assemblies on the following pages.Note: (A) This configuration uses an “off-the-shelf” cable.
Note: (B) This configuration causes a 6 dB signal loss. Compensate by “turning the system up” 6 dB.
To Input
MALEBALANCED XLR
¼" BALANCED TRS (TIP-RING-SLEEVE)
¼" OR 3.5mm UNBALANCED
TS (TIP-SLEEVE)
UNBALANCED RCA BALANCEDEUROBLOCK
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6521
10987
121187
12112221
16 23
23
151413
20
2424
191817
B B
BB
AA
AA
A A
FEMALE BALANCED XLR(NOT A TRANSFORMER,
NOR A CROSS-COUPLEDOUTPUT STAGE)
FEMALE BALANCED XLR(EITHER A TRANSFORMER
OR A CROSS-COUPLEDOUTPUT STAGE)
¼” BALANCED TRS(NOT A TRANSFORMER,
NOR A CROSS-COUPLEDOUTPUT STAGE)
¼” BALANCED TRS(EITHER A TRANSFORMER
OR A CROSS-COUPLEDOUTPUT STAGE)
¼” FLOATING UNBALANCEDTRS (TIP-RING-SLEEVE)(SLEEVE IN UNIT = NC)
¼” OR 3.5 mmUNBALANCED
TS (TIP-SLEEVE)
UNBALANCED RCA(TIP-SLEEVE)
CABLECONNECTORS
BALANCEDEUROBLOCK
+ to +– to –
SHIELD ONLYTO XLR PIN 1
+ to +– to –
SHIELD NC
+ to +– to –
SHIELD NC
+ to +– to –
SHIELD ONLYTO EUROBLOCK
+ to +– to –
SHIELD NC
+ to +– to –
SHIELD ONLY TO TRS SLEEVE
+ to +– to –
GROUND to GROUND
+ to +– to –
GROUND to GROUND
Interconnection-7
10
9S=SHIELDR=NCT=RED
S=SHIELDR=NCT=RED
8
7S=SHIELDR=BLACKT=RED
S=SHIELDR=BLACKT=RED
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11
CROSS-COUPLED OUTPUT ONLY: CONNECT PIN 1 TO PIN 3 AT THIS ENDAND SET GROUND LIFT SWITCH TO ‘GROUNDED’ (IF PRESENT).
CROSS-COUPLED OUTPUT ONLY: CONNECT PIN 1 TO PIN 3 AT THIS ENDAND SET GROUND LIFT SWITCH TO ‘GROUNDED’ (IF PRESENT).
CROSS-COUPLED OUTPUT ONLY: CONNECT RING TO SLEEVEAT THIS END AND SET GROUND LIFT SWITCH TO ‘GROUNDED’ (IF PRESENT).
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SHIELD N/CBLACK
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SHIELD
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BLACKSHIELD
SHIELD
RED
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BLACK
BLACK
RED
RED
SHIELD
RED
SHIELD
RED
SHIELD
RED
SHIELD
RED
BLACK
2-CONDUCTOR SHIELDED CABLE
2-CONDUCTOR SHIELDED CABLE
2-CONDUCTOR SHIELDED CABLE
2-CONDUCTOR SHIELDED CABLE
2-CONDUCTOR SHIELDED CABLE
2-CONDUCTOR SHIELDED CABLE
2-CONDUCTOR SHIELDED CABLE
1-CONDUCTOR SHIELDED CABLE
1-CONDUCTOR SHIELDED CABLE
1-CONDUCTOR SHIELDED CABLE
1-CONDUCTOR SHIELDED CABLE
S=NCR=BLACKT=RED
S=SHIELDT=RED
S=SHIELDT=RED
S=SHIELDT=RED
S=BLACKT=RED
S=BLACKT=RED
S=BLACKT=RED
S=BLACKT=RED
12S=SHIELDR=BLACKT=RED
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CROSS-COUPLED OUTPUT ONLY: CONNECT RING TO SLEEVEAT THIS END AND SET GROUND LIFT SWITCH TO ‘GROUNDED’ (IF PRESENT).
BLACKSHIELD
REDBLACK
RED2-CONDUCTOR SHIELDED CABLE
Interconnection-8 DOC 102907
©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5000 USA TEL 425-355-6000 FAX 425-347-7757 WEB rane.com
22
21MALE
(ANY UNBALANCED CONNECTOR)
(ANY UNBALANCED CONNECTOR)
(CHECK: NO STANDARD POLARITY ON EUROBLOCKS)
(CHECK: NO STANDARD POLARITY ON EUROBLOCKS)
20
19
18
17
16
15
MALE
A
14
13MALE
A
A
A
A
A
132
1
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1
23
S=SHIELDR=BLACKT=RED
S=SHIELDR=BLACKT=RED
S=SHIELDR=BLACKT=RED
S=SHIELDR=BLACKT=RED
S=SHIELDR=BLACKT=RED
23
S=BLACKT=RED
S=BLACKT=RED
S=BLACKT=RED
S=BLACKT=RED
S=SHIELDT=RED
S=SHIELDT=RED
S=SHIELDT=RED
S=SHIELDT=RED
S=SHIELDT=RED
S=SHIELDT=RED
S=SHIELDT=RED
S=SHIELDT=RED
3=BLACK2=RED1=SHIELD
3=BLACK2=RED1=SHIELD
3=BLACK2=RED1=SHIELD
SHIELD
BLACKSHIELD
RED
BLACKSHIELD
RED
BLACKRED
SHIELD
SHIELD
BLACKRED
SHIELDBLACK
RED
SHIELDBLACK
RED
SHIELDBLACK
RED
SHIELDBLACK
RED
SHIELD
RED
SHIELD
RED
SHIELD
RED
SHIELD
RED
BLACKRED
N/C
N/CBLACKRED
BLACKRED
BLACKRED
RED
SHIELD
RED
SHIELD
RED
SHIELD
RED
24S=BLACKT=RED
CROSS-COUPLED OUTPUT ONLY: CONNECT BLACK TO SHIELD AT THIS ENDAND SET GROUND LIFT SWITCH TO ‘GROUNDED’ (IF PRESENT).
BLACKSHIELD
REDBLACK
RED2-CONDUCTOR SHIELDED CABLE
2-CONDUCTOR SHIELDED CABLE
2-CONDUCTOR SHIELDED CABLE
2-CONDUCTOR SHIELDED CABLE
S=BLACKT=RED
SHIELDBLACK
REDBLACKRED
2-CONDUCTOR SHIELDED CABLE
2-CONDUCTOR SHIELDED CABLE
2-CONDUCTOR SHIELDED CABLE
2-CONDUCTOR SHIELDED CABLE
1-CONDUCTOR SHIELDED CABLE
1-CONDUCTOR SHIELDED CABLE
1-CONDUCTOR SHIELDED CABLE
1-CONDUCTOR SHIELDED CABLE
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R150
47.5k
R151
47.5k
R84
1.33k
R85
1.33k
D7
BZT52C
12
D8
BZT52C
12
D10
BZT52C
12
D9
BZT52C
12
C34
220pF
C440.1
C45
0.1
C46
0.1
GN
D
GN
DG
ND
GN
DG
ND
+15-15
2
13
R2A
2kRD
4 12 13 3 5
2
7
810
11
6
9
114
+- G1
G2
V+
V-
RE
FS
EN
U17
1512
GN
D
R206
10.0
R210
10.0
R154
47.5k
R155
47.5k
R88
1.33k
R89
1.33kD11
BZT52C
12
D12
BZT52C
12
D14
BZT52C
12
D13
BZT52C
12
C35
220pF
C47
0.1
C48
0.1
C49
0.1
GN
D
GN
DG
ND
GN
DG
ND
+15-15
2
13
R4A
2kRD
4 12 13 3 5
2
7
810
11
6
9
114
+- G1
G2
V+
V-
RE
FS
EN
U18
1512
GN
D
R207
10.0
R211
10.0
R153
47.5k
R152
47.5k
R86
1.33k
R87
1.33kD15
BZT52C
12
D34
BZT52C
12
D16
BZT52C
12
D17
BZT52C
12
C36
220pF
C50
0.1
C51
0.1
C52
0.1
321
84
U1A 072
567
U1B 072
R129
402k
R133
511
R120
51.1k
R121
51.1kR
113
1.10M
R112
1.10M
R101
100k
R15
100k
R125
2.00k
C86
0.1
D24
MB
R0540T1G
GN
D
321
84
U3A 072
567
U3B 072
R127
402k
R131
511
R116
51.1k
R117
51.1kR
109
1.10M
R108
1.10M
R99
100k
R180100k
R123
2.00k
C84
0.1
D22
MB
R0540T1G
GN
D
321
84
U2A 072
567
U2B 072
R128
402k
R132
511
R118
51.1k
R119
51.1kR
111
1.10M
R110
1.10M
R100
100k
R181100k
R124
2.00k
C85
0.1
D23
MB
R0540T1G
GN
D
321
84
U4A 072
567
U4B 072
R126
402k
R130
511
R114
51.1k
R115
51.1kR
107
1.10M
R106
1.10M
R98
100k
R182100k
R122
2.00k
C83
0.1
D21
MB
R0540T1G
R220
2.49k
R250
100R
251
100 R221
2.49kR
2222.49k
R223
2.49kR
2242.49k
R225
2.49k
R226
2.49kR
2272.49k
R228
2.49kR
2292.49k
R230
2.49kR
2312.49k
R232
2.49kR
2332.49k
R14
2.49kR
902.49k
R91
2.49kR
2372.49k
R92
2.49kR
2392.49k
R240
2.49kR
2412.49k
R242
2.49kR
2432.49k
R261
10.0k
R262
10.0k
R12
10.0k
R263
10.0k
R265
10.0k
R266
10.0k
R264
10.0k
R267
10.0k
R269
10.0k
R270
10.0k
R268
10.0k
R271
10.0k
R273
10.0k
R274
10.0k
R272
10.0k
R275
10.0k
R280
2.00
R281
2.00
R282
2.00
R283
2.00
+
C37
470/25v
+
C38
470/25v
+
C39
470/25v
+
C40
470/25v
R1C
2kRDG
ND
R2C
2kRDG
ND
R3C
2kRDG
ND
R4C
2kRDG
ND
78S
1C
2P2T
GN
D78S
3C
2P2T
GN
D
78S
2C
2P2T
GN
D78S
4C
2P2T
GN
D
78 S13C2P
2TG
ND
C96
0.1
C95
0.1
C92
0.1
C91
0.1
C94
0.1
C93
0.1
C90
0.1
C89
0.1
EC
N 114570
RI TO
SM
T CO
NV
ER
SIO
N
D42
1SM
B15C
AT3D
43GN
D
D46
1SM
B15C
AT3D
47GN
D
D44
1SM
B15C
AT3D
45GN
D
D48
1SM
B15C
AT3D
49GN
D
C:\C
AD
Projects\M
LM82S
\MLM
82S-2.S
chDoc
1/11/2012C
HEC
KED BY:
DR
AWN
BY:SH
EET:10802 47th A
venue West
Mukilteo W
A 98275-5098
23
LINE
INP
UTS
MLM
82S
114577of
ACTIO
N:
Main
GN
D
2
1 3
R5A
10kA
GN
D
C70
22/16v
-15
+15
GN
D
GN
D
2
1 3
R6A
10kA
GN
D
C71
22/16v
-15
+15
GN
D
2
1 3
R7A
10kA
GN
D
Z132200pF
Z142200pF
C72
22/16v
-15
+15
GN
D
2
1 3
R8A
10kA
GN
D
Z152200pF
Z162200pF
C73
22/16v
-15
+15
GN
D
5
4 6
R5B
10kA
GN
D
C74
22/16v
+15
-15
GN
D
GN
D
5
4 6
R6B
10kA
GN
D
C75
22/16v
GN
D
5
4 6
R7B
10kA
GN
D
Z212200pF
Z222200pF
C76
22/16v
GN
D
5
4 6
R8B
10kA
GN
D
Z232200pF
Z242200pF
C77
22/16v
123 S
5A2P
2T123 S
6A2P
2T
123 S
7A2P
2T
123 S
8A2P
2T
LINE
5A
LINE
6A
LINE
7A
LINE
8ALIN
E 8B
LINE
7B
LINE
6B
LINE
5B
LINE
8 MO
NO
LINE
7 MO
NO
LINE
6 MO
NO
LINE
MIX
_ALIN
E M
IX_B
456 S
5B
2P2T
456 S
6B
2P2T
456 S
7B
2P2T
456 S
8B
2P2T
+15-15
LINE
5 MO
NO
R165
47.5kR
164
47.5k
R20
11.3k
R25
11.3k
R30
11.3k
R35
11.3k
R40
11.3k
R45
11.3k
R50
11.3k
R11
11.3k
5 67
U9B
4580
8
3 21
4
U9A
4580
C53
0.1
321
84
U5A
4580
C54
0.1
321
84
U6A
4580
C55
0.1
321
84
U7A
4580
C56
0.1
321
84
U8A
4580
C57
0.1
567
U5B
4580
567
U6B
4580
567
U7B
4580
567
U8B
4580
R57
10.0k
R56
10.0k
R58
10.0k
R59
10.0k
R19
10.0k
R16
10.0k
R17
10.0k
R18
10.0k
R156
511
R24
10.0k
R21
10.0k
R22
10.0k
R23
10.0k
R157
511
R29
10.0k
R26
10.0k
R27
10.0k
R28
10.0k
R158
511
R34
10.0k
R31
10.0k
R32
10.0k
R33
10.0k
R159
511
R39
10.0k
R36
10.0k
R37
10.0k
R38
10.0k
R160
511
R44
10.0k
R41
10.0k
R42
10.0k
R43
10.0k
R161
511
R49
10.0k
R46
10.0k
R47
10.0k
R48
10.0k
R162
511
R13
10.0k
R51
10.0k
R52
10.0k
R53
10.0k
R163
511
C105
47pF
C106
47pF
D36
YEL
D32
YEL
D31
YEL
D35
YEL
R5C
10kAGN
D
R6C
10kAGN
D
R7C
10kAGN
D
R8C
10kAGN
D
78S
8C
2P2T
GN
D 78S
7C
2P2T
GN
D 78S
6C
2P2T
GN
D 78S
5C
2P2T
GN
D
J1A
ST S
W TH
J1B
ST S
W TH
J4A
ST S
W TH
J4B
ST S
W TH
J5A
ST S
W TH
J5B
ST S
W TH
J6A
ST S
W TH
J6B
ST S
W TH
Z92200pF
Z102200pF
Z112200pF
Z122200pF
Z172200pF
Z182200pF
Z192200pF
Z202200pF
GN
D
GN
D
GN
D
GN
DG
ND
GN
D
GN
D
GN
D
+15-15
+15-15
+15-15
-15 +15
GN
D
C4
0.1C
50.1
C6
0.1C
70.1
C8
0.1
EC
N 114570
RI TO
SM
T CO
NV
ER
SIO
N
D54
1SM
B15C
AT3
D55
GN
D
D58
1SM
B15C
AT3
D59
GN
D
D62
1SM
B15C
AT3
D63
GN
D
D66
1SM
B15C
AT3
D67
GN
D
D56
1SM
B15C
AT3
D57
GN
D
D60
1SM
B15C
AT3
D61
GN
D
D64
1SM
B15C
AT3
D65
GN
D
D68
1SM
B15C
AT3
D69
GN
D
C:\C
AD
Projects\M
LM82S
\MLM
82S-3.S
chDoc
1/11/2012C
HEC
KED BY:
DR
AWN
BY:SH
EET:10802 47th A
venue West
Mukilteo W
A 98275-5098
33
MIX
/OU
TPU
T MLM
82S
114577of
ACTIO
N:
Main
23
41
S9A
2P3T
67
85
S9B
2P3T
23
41
S10A
2P3T
67
85
S10B
2P3T
23
41
S11A
2P3T
67
85
S11B
2P3T
23
41
S12A
2P3T
67
85
S12B
2P3T
MIC
1
MIC
2
MIC
3
MIC
4
LINE
MIX
_A
LINE
MIX
_BG
ND
GN
D-15
+15
+15
-15G
ND
1 2 3S
14A2P
2T
456S
14B2P
2T
2
1 3
R9A
10kA
GN
D
GN
D
+15
-15
GN
D
1 2 3S
15A2P
2T
456S
15B2P
2T
GN
D
GN
D GN
D
-15+15
D19
RE
D
-15
GN
D
GN
D GN
DD
20R
ED
-15
AB
321
84
U14A 072
567
U14B072
C88
0.1
5 67
U12B4580
C65
0.1
8
3 21
4
U12A 4580
C64
0.1
8
3 21
4
U11A 4580
C87
0.1
5 67
U11B4580
8
3 21
4
U13A 4580
5 67
U13B4580
R64
10.0k
R65
10.0k
R66
10.0k
R67
10.0k
R68
10.0k
R79
10.0k
R61
10.0kR
62
10.0k
R63
10.0k
R73
10.0k
R74
10.0k
R75
10.0k
R76
10.0k
R77
10.0k
R81
10.0k
R70
10.0kR
71
10.0k
R72
10.0k
R104
100k
R105
100kR177
20.0k
R78
6.81k
R178
20.0k
R80
6.81k
R142
5.11k
R143
5.11k
R10
5.11k
R145
5.11k
R171
100
R172
100
R174
100
R175
100
R173
100
R176
100
C109
33pF
C110
33pF
D3
MB
R0540T1G
R277
10.0k
R278
10.0k
R276
10.0k
R279
10.0k
21 34
+-
J23pin M
ALE
XLR
21 34
+-
J123pin M
ALE
XLR
T 1A 250V
F3
0.0022 X1Y2
C195
0.0022 X1Y2
C196
20mH
12
43
T1
0.33C
197
DF06M
4 3
12
D33
0.001C
2000.001C
199
0.0022 X1Y2
C201
H6G
ND
P
VIP
ER
50
1 2
5
4 3Vdd
OSC
DR
AINS
COMP
U38
10.0kR
144600uH
598
42
10
1
67
T2
+C
1936.8/400v
P6S
MB
160AT
D25
MU
RS
160D
26
1/50v+C
192
1.00kR
260
4148
D27
36.5
R234
47/50v+
C189
FOD
2741
LED
8
GN
D5
NC
4
CO
MP
6E
3
C2
NC
1
FB7
U36
0.001
C190
MU
RS
160
D28
MU
RS
160
D29
130
R235
130
R236
1.24kR
238
0.1C
185
10.0kR
258
+C
202470/25v
+C
203470/25v
L510uH
L610uH
+C
182150/25v
+C
183150/25v
GN
D
+15
-15
51.1kR
2590.0022
C188
GN
D
0.068C
18710.0kR
54
YEL
D18
10.0kR
55
+15
GN
D
PO
WE
R
TP1
TP2
IEC
PW
R
H3
G2
N1
J11
5
46
R9B
10kA
R9C
10kAGN
D
54
6R
179B10kA
R179C
10kAGN
D
910
S9C
2P3T
910
S10C
2P3T
910
S11C
2P3T
910
S12C
2P3T
GN
D
78
S14C
2P2T
78
S15C
2P2T
GN
D
GN
D
H2
H1
H3
H4
H5
C63
1/50v
C62
22/16v
Z252200pFZ26
2200pF
Z272200pFZ28
2200pF
GN
D
GN
D
GN
DG
ND
+C
1141/50v
+C
1131/50v
MIC
LINE
MIC
LINE
MIC
LINE
MIC
LINE
C1
0.1
-15 +15
C2
0.1C
30.1
GN
DD40
MB
R0540T1G
R102
5.11k
R103
5.11kC
112
47pF
C111
47pF
GN
D
C107
47pF
C108
47pFR
69
20.0k
R60
20.0k
2
1 3
R179A10kA
D2
MB
R0540T1G
C61
1/50v
C60
22/16v
D41
MB
R0540T1G
GN
D
EC
N 114570
RI TO
SM
T CO
NV
ER
SIO
N
D51
1SM
B15C
AT3
D50
GN
D
D53
1SM
B15C
AT3
D52
GN
D
WARRANTY
FACTORY AUTHORIZED SERVICEYour unit may be serviced by the Rane Factory or any Authorized Rane Service Center. To find a Service Center near you, please call the Rane factory, or check the Rane website. Please do not return your unit to Rane without prior authorization.
Rane Corporation
To obtain service or a Return Authorization, please phone 425-355-6000
or Fax 425-347-7757
The current list of U.S. Rane Authorized Service Centers is found on our website: www.rane.com/service.html
LIMITED DOMESTIC WARRANTY
RANE CORPORATION WARRANTS ALL RANE PRODUCTS (EXCEPT THOSE ITEMS CLASSIFIED AS WEAR PARTS, AND LISTED ON THE MANUAL-1 PAGE OF EACH OPERATORS MANUAL) PURCHASED IN THE USA AGAINST DEFECTS IN MATERIAL OR WORKMANSHIP FOR A PERIOD OF TWO (2) YEARS. WEAR PARTS ARE LIMITED TO A PERIOD OF NINETY (90) DAYS FROM THE INITIAL DATE OF RETAIL PURCHASE FROM AN AUTHORIZED RANE DEALER—WEAR PARTS REQUIRE PROOF OF PURCHASE DATE. This limited warranty extends to all purchasers or owners of the product during the warranty period beginning with the original retail purchase. Rane Corporation does not, however, warrant its products against any and all defects: 1) arising out of material or workmanship not provided or furnished by Rane, or 2) resulting from abnormal use of the product or use in violation of instructions, or 3) in products repaired or serviced by other than authorized Rane repair facilities, or 4) in products with removed or defaced serial numbers, or 5) in components or parts or products expressly warranted by another manufacturer. Rane agrees to supply all parts and labor to repair or replace defects covered by this limited warranty with parts or products of original or improved design, at its option in each respect, if the defective product is shipped prior to the end of the warranty period to any Rane authorized warranty repair facility in the U.S. or to the Rane factory in the original packaging or a replacement supplied by Rane, with all transportation costs and full insurance paid each way by the purchaser or owner.
LIMITED WARRANTY OUTSIDE THE U.S.A.RANE PRODUCTS ARE WARRANTED ONLY IN THE COUNTRY WHERE PURCHASED, THROUGH THE AUTHORIZED RANE DISTRIBUTOR IN THAT COUNTRY, AGAINST DEFECTS IN MATERIAL OR WORKMANSHIP, THE SPECIFIC PERIOD OF THIS LIMITED WARRANTY SHALL BE THAT WHICH IS DESCRIBED TO THE ORIGINAL RETAIL PURCHASER BY THE AUTHORIZED RANE DEALER OR DISTRIBUTOR AT THE TIME OF PURCHASE. Rane Corporation does not, however, warrant its products against any and all defects: 1) arising out of materials or workmanship not provided or furnished by Rane, or 2) resulting from abnormal use of the product or use in violation of instructions, or 3) in products repaired or serviced by other than authorized Rane repair facilities, or 4) in products with removed or defaced serial numbers, or 5) in components or parts or products expressly warranted by another manufacturer. Rane agrees, through the applicable authorized distributor, to repair or replace defects covered by this limited warranty with parts or products of original or improved design, at its option in each respect, if the defective product is shipped prior to the end of the warranty period to the designated authorized Rane warranty repair facility in the country where purchased, or to the Rane factory in the U.S., in the original packaging or a replacement supplied by Rane, with all transportation costs and full insurance paid each way by the purchaser or owner.
ALL REMEDIES AND THE MEASURE OF DAMAGES ARE LIMITED TO THE ABOVE SERVICES, IT IS POSSIBLE THAT ECONOMIC LOSS OR INJURY TO PERSON OR PROPERTY MAY RESULT FROM THE FAILURE OF THE PRODUCT; HOWEVER, EVEN IF RANE HAS BEEN ADVISED OF THIS POSSIBILITY, THIS LIMITED WARRANTY DOES NOT COVER ANY SUCH CONSEQUENTIAL OR INCIDENTAL DAMAGES. SOME STATES OR COUNTRIES DO NOT ALLOW THE LIMITATIONS OR EXCLUSION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, ARISING BY LAW, COURSE OF DEALING, COURSE OF PERFORMANCE, USAGE OF TRADE, OR OTHERWISE, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED TO A PERIOD OF TWO (2) YEARS FROM EITHER THE DATE OF ORIGINAL RETAIL PURCHASE OR, IN THE EVENT NO PROOF OF PURCHASE DATE IS AVAILABLE, THE DATE OF MANUFACTURE, SOME STATES OR COUNTRIES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU. THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE, COUNTRY TO COUNTRY.
Warranty-1
WARRANTY PROCEDURE - Only Valid in the USA
NOTICE! You must complete and return the warranty card or register your product online to extend the Warranty from 2 years to 3 years!
TO VALIDATE YOUR EXTENDED WARRANTY: Use the postcard that came in the box with your unit, or go to www.rane.com and click on New Product Registration. Fill out the warranty completely, being sure to include the model and serial number of the unit since this is how warranties are tracked. If your Rane product was purchased in the USA, mail the completed card or register online with to Rane Corporation within 10 days from the date of purchase. If you purchased the product outside the USA you must file your warranty registration with the Rane Distributor in that country. It is advised that you keep your bill of sale as proof of purchase, should any difficulties arise concerning the registration of the warranty card. NOTICE: IT IS NOT NECESSARY TO REGISTER IN ORDER TO RECEIVE RANE CORPORATION’S STANDARD TWO YEAR LIMITED WARRANTY.
WARRANTY REGISTRATION is made and tracked by model and serial numbers only, not by the purchaser’s or owner’s name. Therefore any warranty correspondence or inquires must include the model and serial number of the product in question. Be sure to fill in the model and serial number in the space provided below and keep this in a safe place for future reference.
WARRANTY SERVICE MUST BE PERFORMED ONLY BY AN AUTHORIZED RANE SERVICE FACILITY LOCATED IN THE COUNTRY WHERE THE UNIT WAS PURCHASED, OR (if product was purchased in the USA) AT THE RANE FACTORY IN THE USA. If the product is being sent to Rane for repair, please call the factory for a Return Authorization number. We recommend advance notice be given to the repair facility to avoid possible needless shipment in case the problem can be solved over the phone. UNAUTHORIZED SERVICE PERFORMED ON ANY RANE PRODUCT WILL VOID ITS EXISTING FACTORY WARRANTY.
FACTORY SERVICEIf you wish your Rane product to be serviced at the factory, it must be shipped fully insured, in the original packing box or equivalent. This warranty will not cover repairs on products damaged through improper packaging. If possible, avoid sending products through the mail. Be sure to include in the package:
1. Complete return street shipping address (P.O. Box numbers are not acceptable).
2. A detailed description of any problems experienced, including the make and model numbers of any other system equipment.
3. Remote power supply, if applicable.
Repaired products purchased in the U.S. will be returned prepaid freight via the same method they were sent to Rane. Products purchased in the USA, but sent to the factory from outside the USA must include return freight funds, and the sender is fully responsible for all customs procedures, duties, tariffs and deposits.
In order to qualify for Rane’s one year extended warranty (for a total of 3 years parts and labor), the warranty must be completely filled out and sent to
us immediately. Valid in USA only.
We recommend you write your serial number here in your owners manual and on your sales receipt for your records.
SERIAL NUMBER:______________________________________PURCHASE DATE:__________________________________
©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5000 TEL 425-355-6000 FAX 425-347-7757 WEB www.rane.com
Warranty-2 108360
EU Declaration of Conformity
Product Model: MLM82S Serial Numbers: 900000 – 999999Product Type: Professional Audio Signal Processing
Manufacturer: Rane CorporationAddress: 10802 47th Avenue West, Mukilteo WA 98275-5000 USA
This declaration is issued under the sole responsibility of Rane Corporation.
The object of the declaration described above is in conformity with the relevant Union harmonisation legislation:2014/35/EU The Low Voltage Directive2014/30/EU The Electromagnetic Compatibility Directive2012/19/EU The Waste Electrical and Electronic Equipment Directive2011/65/EU The Restriction of Hazardous Substances Directive2001/95/EC The General Product Safety Directive
References to the relevant harmonised standards used in relation to which conformity is declared:EN60065:2002/A1:2006/A11:2008/A2:2010/A12:2011 Safety for audio, video and similar electronic apparatus.EN55103-1:2009/AM1:2012 Compatibility of professional electronic A/V apparatus emissions.EN55103-2:2009 Compatibility of professional electronic A/V apparatus immunity.EN50581:2012 Technical documentation for RoHS assessment of electronic products.
Additional Information:Environment E2CE mark first affixed in 2007
In order for the customer to maintain compliance with these regulations, high quality shielded cable must be used for interconnection to other equipment. No changes or modification of the equipment, other than that expressly outlined by the manufacturer, are allowed. The user of this equipment shall accept full responsibility for compliance with Union harmonisation legislation in the event that the equipment is modified without written consent of the manufacturer.
EN55103-2 Immunity Results: THD+N: 4 dBu, 400 Hz, BW 20 Hz - 20 kHzTest Description Measurement ConditionsRF Electromagnetic Fields Immunity
80 MHz - 1000 MHz, 1 kHz AM, 80% depth, 3V/m <-68 dB 80 MHz - 200 MHz<-30 dB 200 MHz - 1000 MHz
Conducted RF Disturbances Immunity150 kHz - 80 MHz, 1 kHz AM, 80% depth, 3V rms <-80 dB Power Lines
<-79 dB Signal LinesMagnetic Fields Immunity
50 Hz - 10 kHz, 4.0 - 0.4 A/m <-53 dB
Signed for and on behalf of: Rane CorporationPlace of issue: Mukilteo WA USA Date of issue: May 23, 2007Name: Michaël Rollins Function: Compliance Engineer Signature:
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