interm mx 2236 ex operation manual english

MX-1436/1836/2236(EX) Stereo Mixing Console

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ContentsContentsWelcome

Warning.........................................................................................................................................1Unpacking ......................................................................................................................................2Short Form Instructions.....................................................................................................................2

InstallationEnvironment....................................................................................................................................3Important Safety Instructions.............................................................................................................3

Description.......................................................................................................................................4

Features............................................................................................................................................4Accessories.....................................................................................................................................4

Front Panel ......................................................................................................................................5

Rear Panel .....................................................................................................................................12

Connections ...................................................................................................................................14

Operation ......................................................................................................................................15

Applications ..................................................................................................................................20

Block Diagram ..............................................................................................................................21

Specifications ................................................................................................................................22

ServiceProcedures....................................................................................................................................25Schematic .....................................................................................................................................25Parts List .......................................................................................................................................25

Variations and Options ...............................................................................................................25

Warranty .......................................................................................................................................25

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*Do not install this equipment in a confined space such as a book case or similar unit.*The apparatus shall not be exposed to dripping or splashing and no objects filled with liquids, such vases, shall be placed on the apparatus.*Worded: “WARNING FOR YOUR PROTECTION PLEASE READ THE FOLLOWING-WATER AND MOISTURE: Unit should not be usednear water(e.g. near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be takenso than objects do not fall and liquids are not spilled into the enclosure through openings.”

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STEREO MIXING CONSOLE

WelcomeWelcomeA personal welcome to you from the management and employees of Inter-M

All of the co-workers here at Inter-M are dedicated to providing excellent products with inherently good value,and we are delighted you have purchased one of our products.

We sincerely trust this product will provide years of satisfactory service, but if anything is not to your completesatisfaction, we will endeavor to make things right.

Welcome to Inter-M, and thank you for becoming part of our worldwide extended family!

RISK OF ELECTRIC SHOCKDO NOT OPEN

CAUTION

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK.

DO NOT REMOVE COVER (OR BACK).

NO USER-SERVICEABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

WARNING

To prevent fire or shock hazard, do notexpose the unit to rain or moisture.

This symbol is intended to alert the user to thepresence of uninsulated “dangerous voltage” withinthe product’s enclosure that may be of suf-ficientmagnitude to constitute a risk of electric shock topersons.

This symbol is intended to alert the user to thepresence of important operation and mainte-nance(servicing) instructions in the literature accompanyingthe appliance.

Caution: To prevent electric shock do not use this (polarized) plug withan extension cord, receptacle or other outlet unless the bladescan be fully inserted to prevent blade expo-sure.

Attentions: Pour prévenir les chocs électriques ne pas utiliser cettefiche polarisée avec un prolongateur, une prise de couranton une autre sortie de courant, sauf si les lames peuventétre insérées à fond sans en laisser aucune partie àdécouvert.

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UnpackingPlease take a few minutes to read this manual to familiarize yourself with the important information regardinginstallation, product features, and operation.

As with most electronic devices, ORIGINAL PACKAGING (OR EQUAL) IS REQUIRED in the unlikely event thatthe product needs to be returned for servicing.

Short Form InstructionsUse only stereo headphones with the headphone out jack! When a mono 1/4” connector is plugged into thestereo connector, it connects one output from the headphone amplifier to ground. In any professional audiosystem, accidents can happen, so there are protection circuits to help assure that momentary shorts will not causefailure, but this caution should be observed.

1. Do not connect the unit to the AC mains until some preliminary settings are completed. AC mains should onlybe switched on later in this procedure. Ensure that the AC power and phantom power switches are in the OFFposition.

2. Move all faders down to the “∞” (minimum gain) position. Turn all level control knobs for TRIM, AUX1, AUX2,EFX, including those marked AUX SEND, AUX RTN, MONO, TAPE IN, and CONTROL ROOM/PHONES tothe full counter-clockwise or “∞” position. All equalizer controls should be set to the “V” or “0” position.

3. Connect the appropriate OUTPUTS to the inputs of the device that follow the mixing console, or integrate itwith the complete sound/recording system.

4. Connect the INPUT of the mixing console channels to the source devices using the appropriate input channelconnectors (MIC, LINE, STEREO, TAPE).

5. Connect the AC mains to the mixing console and apply AC power by switching the console AC POWERswitch to the ON position. You may also switch on the PHANTOM POWER if you are using condensermicrophones that require phantom power.

6. After ensuring that the various signal sources are activated and providing normal signal levels, adjust theinput channel TRIM controls to prevent the PEAK indicators from steadily glowing.

7. Depress the L/R switch on one of the input channels having signal. SLOWLY increase the Main L R faderposition and the input channel fader until the desired level is reached. The fader position should rarely needto be adjusted to a position higher than the “0” marking. Obviously, if there is distortion or feedback, reducethe input signal level, or lower the position of the faders.

8. If step 7 was successful, depress the L/R button and SLOWLY increase the position of the faders of theremaining input channels being used. Remember, unused channel faders should always be OFF (at “∞”). Ifthere was a problem at step 7 then some troubleshooting should occur before proceeding any further.

9. Incorporate the console’s remaining capabilities as desired.

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InstallationInstallationEnvironmentNever place this product in an environment which could alter its performance or reduce its service life. Suchenvironments usually include high levels of heat, dust, moisture, and vibration.

Important Safety Instructions1. Please read and follow these instructions.2. Do not use this product near water.3. Clean only with a damp cloth.4. Do not block any of the ventilation openings.5. Never place this product in an environment of high levels of heat, dust, moisture, or vibration.6. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and

the point where they exit from the product.7. Unplug this product during lightning storms or when unused for long periods of time.8. Refer all servicing to qualified service personnel. Servicing is required when the

product has been damaged in any way, such as power supply cord or plug isdamaged, liquid has been spilled or objects have fallen into the product, the producthas been exposed to rain or moisture, does not operate normally, or has beendropped.

- AVOID EXCESSIVE HEAT, HUMIDITY, DUST AND VIBRATIONKeep the unit away from locations where it is likely to be exposed to high temperatures or humidity-such asnear radiators, stoves, etc. Also avoid locations which are subject to excessive dust accumulation, or tovibration that could cause mechanical damage.

- AVOID PHYSICAL SHOCKSStrong physical shocks to the unit may cause damage. Handle the unit with care.

- DO NOT OPEN THE CASE OR ATTEMPT REPAIRS OR MODIFICATIONS YOURSELFThis product contains no user-serviceable parts. Refer all maintenance to qualified Inter-M service personnel.Opening the case and/or tampering with internal circuitry voids the warranty.

- ALWAYS POWER OFF BEFORE MAKING CONNECTIONSAlways turn the AC mains OFF before connecting or disconnecting cables. This is important to preventdamage to the unit itself as well as other connected equipment.

- HANDLE CABLES CAREFULLYAlways plug and unplug cables (including the AC mains power cord) by gripping the connector, not the cord.

- CLEAN WITH A SOFT DRY CLOTHNever use solvents such as benzine or paint thinner to clean the unit. Wipe clean with a soft, dry cloth.

S3125A

S3125A

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DescriptionDescription- MX-1436/1436EXThis product is a 14 input (6 mono, 4 stereo) mixer with 3 auxes, 4 sub groups, and separate Left/Right outputs.The product is supplied with detachable Rack Ears.

- MX-1836/1836EXThis product is an 18 input (10 mono, 4 stereo) mixer with 3 auxes, 4 sub groups, and separate Left/Rightoutputs.

- MX-2236/2236EXThis product is a 22 input (14 mono, 4 stereo) mixer with 3 auxes, 4 sub groups, and separate Left/Rightoutputs.

FeaturesFeatures- Mono and stereo input channels (6, 10, or 14 mono inputs, all with 4 stereo inputs).- 2 AUX Sends, 1 EFX Send.- 4 Sub Groups output.- Separate Left/Right Master faders.- 3 band equalizer on each mono input channel.- 4 band equalizer on each stereo input channel.- SOLO/PFL function on each input channel.- 9 Band Graphic Equalizer (Only MX-1436EX/1836EX/2236EX) - 24 bit Digital Effects (Only MX-1436EX/1836EX/2236EX)- +48V Phantom Power- Detachable rack ears for mounting in a standard 19” rack enclosure (MX-1436(EX) model only)

AccessoriesDetachable Rack Ears and mounting screws are included in the packing carton (MX-1436(EX) model only).

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Front PanelFront Panel1. MONO INPUT SECTION

1. MIC INPUTBalanced low impedance microphone input via a 3-conductorXLR-type connector.

2. LINE INPUTBalanced or unbalanced line level input via a 1/4" TRS (Tip,Ring, Sleeve) connector.

3. 80Hz HIGH PASSDepressing this button will reduce the level of the input sourcebelow 80Hz. This is used with microphones to reduce lowfrequency noise.

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4. TRIM CONTROLThe Trim (or Input Gain) control knob is used to adjust the level of the input signal. The best balance of S/Nand dynamic range will be achieved if you adjust the TRIM control so that the PEAK indicator rarelyilluminates.

5. PEAK INDICATORThe Peak indicator illuminates when the input signal reaches 3dB below the clipping point of the channels.See TRIM CONTROL .

6. HIGH, MID, FREQ, and LOW CONTROLSThese knobs control the equalizer on each mono input. Each range (high, mid, or low) may be adjustedindependently. Mid frequencies are selected by turning the FREQ knob to the desired frequency. The center“v” is the normal position (no boost or cut).

7. AUX 1, AUX 2, EFX CONTROLSEach of these knobs determines the level of the signal sent to the corresponding buses. The AUX 1 signal isPre fader, AUX 2 is selectable Pre or Post fader, and EFX is Post fader.

8. PRE/POST SWITCHThis button determines whether the AUX 2 signal is Pre or Post fader. Pre means not affected by the positionof the channel fader. Post means is affected by the position of the channel fader.

9. PAN CONTROLThe PAN control adjusts signal levels between the Left and Right and the odd and even groups. The “v”position means that equal signal levels are available to all of the busses.

10. L/R, 1/2, 3/4 SWITCHESDepressing each switch will enable the signal to be sent to the selected busses. L/R to the Left and Rightbusses, 1/2 to groups 1 and 2, and 3/4 to groups 3 and 4. The PAN control adjusts the signal levelsbetween Left, 1, 3 and Right, 2, 4.

11. CHANNEL FADERThis fader adjusts the signal level that is sent from the input channel to the various mixing busses.

12. SOLO SWITCHThis switch allows the input channel signal to be heard in the headphone and “Control Room” outputs asSOLO (post-fader) or PFL (pre-fader).

CONTROL

HIGH

MID

LOW

MAX. BOOST/CUT

±15dB

±12dB

±15dB

FREQUENCY

12kHz

100~8kHz

80Hz

TYPE

Shelving

Peaking

Shelving

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2. STEREO INPUT SECTION

1. AUX RETURN 1, AUX RETURN 2 JACKSThese input connectors are for the signal returned from aneffect unit. If a plug is inserted only in L/MONO, the samesignal will be sent to both the L and R busses.

2. STEREO INPUT JACKSUnbalanced Stereo input via two 1/4” type connectors. If aconnector is inserted only in L/MONO, the same signal will besent to both the L and R buses.

3. TRIM CONTROLThe Trim (or Gain) control knob is used to adjust the level ofthe input signal. Adjust the TRIM control so that the PEAKindicator flashes only occasionally.

4. PEAK INDICATORThe Peak indicator illuminates when the input signal reaches3dB below the clipping point of the channels. See TRIMCONTROL .

5. HIGH, HI-MID, LOW-MID, and LOW CONTROLSThese knobs control the equalizer on each stereo input. Eachrange may be adjusted independently. The center “v” is thenormal position (no boost or cut).

6. AUX 1, AUX 2, EFX CONTROLSEach of these knobs determines the level of the signal sent tothe corresponding buses. The AUX 1 signal is Pre fader, AUX2 is selectable Pre or Post fader, and EFX is Post fader.

7. PRE/POST SWITCHThis button determines whether the AUX 2 signal is Pre or Postfader. Pre means the level is not affected by the position of thechannel fader. Post means the level is affected by the positionof the channel fader.

8. BAL CONTROLThe BAL adjusts the signal levels between Left and Right andthe odd and even groups. The “v” position means that equalsignal levels are available to all of the busses.

9. L/R, 1/2, 3/4 SWITCHESDepressing each switch will enable the signal to be sent to theselected busses. L/R to the Left and Right busses, 1/2 togroups 1 and 2, and 3/4 to groups 3 and 4. The PAN controlwill divide the signal between Left, 1, 3 and Right, 2, 4.

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10. CHANNEL FADERThis determines the level of the signal that is sent from the input channel to the various mixing busses.

11. SOLO SWITCHThis allows the input channel to be heard in the headphone and “Control Room” outputs as SOLO (post-fader)or PFL (pre-fader).

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3. MASTER SECTION

1. MAIN OUT CONNECTORSThese connectors are the Main Left and Rightoutputs. Their level is controlled by the MAIN MIXLeft/Right faders. They provide signal to the inputsof various electronic devices such as recorders,amplifiers, or signal processing.

2. INSERT L/R JACKSThese are used to insert electronic devices such aseffects or equalizers into the signal path of theMAIN L R signal. INSERT jacks are special con-nectors that function as both an output and an inputat the same time. Special Insert cables allow thesignal to leave (send) from the mixer, go intoanother product, and come back (return) into themixer using the same jack.

3. CONTROL ROOM L/R JACKSThese Unbalanced 1/4” phone jacks have the samesignal and level as the MAIN L/R OUTPUTS. Theyare usually used to provide line level signal to anamplified speaker system so the sound operator canhear the main output of the mixer. They may beused instead as recording outputs.

4. AUX 1 and AUX 2 RETURN CONTROLSThese controls adjust the levels of the AUX 1 RTN(Return) and AUX 2 RTN inputs which feed theMAIN L R busses. The normal use is to send signalfrom an AUX SEND to an effects device, and returnthe signal to the console via an AUX RTN. SeparateLeft and Right jacks are provided for each AUXRTN. If only the L/MONO jack is used the signalwill be sent to both Left and Right channels.

5. AUX 1, AUX 2, EFX SEND CONTROLSThese controls adjust the signal level of the AUX 1SEND, AUX 2 SEND, and the EFX outputs.

6. TO MIX SWITCHESThis switches the signal of each GROUP 1/2 andGROUP 3/4 to the MIX L/R busses.

7. GROUP 1-4 FADERSThese determine the level of each of the Groupoutputs.

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No. 8~12 are applied only to MX-1436EX/ 1836EX/2236EX.8. GRAPHIC EQUALIZER

The MX-1436EX/1836EX/2236EX Series internal stereo graphic equalizer (GEQ) allows the fine responseshaping of the main program output.This section has nine linear controls, corresponding to center frequencies of 63Hz, 125Hz, 250Hz, 500Hz,1kHz, 2kHz, 4kHz, 8kHz, 16kHz. Each control permits a maximum boost or cut of 12dB. When a control is set to the center or 0 position, theresponse in the corresponding band is unaffected.

9. GRAPHIC EQ OUTPUT ON/OFF SWITCH This switch turns the graphic equalizer on and off.

10. DSP ON/OFF SWITCH This switch turns the internal digital effect on/off.

11. DSP PROGRAM SELECTION SWITCH This is used to select internal digital effect types.1. CHORUS-ROOM 1: ROOM 1 + Slow flange. Good for guitars, synthesizers, and pianos.2. CHORUS-ROOM 2: Small ROOM 2 + Slow flange3. VOCAL CANCEL4. ROTARY SPEAKER: Provides speaker-rotating effects. Good for guitars, vocals, keyboard, and other

musical instruments.5. HALL1: Provides Medium Concert Hall reverberation effects. Good for vocals and musical instruments6. HALL2: Large Concert Hall reverberation effects. Good for drums, pianos, and other musical instruments.7. DELAY1: Provides echo effect. Good for vocals and rhythm guitars8. DELAY2: Good for SOLO musical instruments that do not need long reverberation (291 to 381ms)9. CHORUS: Also called as Chorus/Doubler. Provides 6 mixed ensembles of short delay10. FLANGE: Classic stereo flange (suitable for electric guitars)11. ROOM1: Medium-sized hall reverberation. Good for vocals, drums, lead guitars and other musical

instruments12. ROOM2: Medium-large sized hall reverberation. Good for drums percussion instruments, electric guitars

and other musical instruments.13. ROOM3 Large-sized hall reverberation. Good for acoustic instruments14. PLATE1: Soft plate reverb15. PLATE2: Light plate effect16. PLATE3: Short plate effect

12. DSP OUTPUT CONTROLSThese controls adjusts the level of the return signal which is sent from the internal digital effect to the mix L/Rbus or aux1/aux2 bus.

13. MONO CONTROLThis knob determines the signal level of the MONO output jack. The MONO signal is derived by combiningthe Left and Right signals together.

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14. TAPE IN CONTROLThis adjusts the signal levels of the TAPE IN inputs which feed the MAIN L R busses. This is commonly used asan extra input for a stereo source if all of the Stereo Inputs are in use.

15. CONTROL ROOM and HEADPHONES CONTROLThis adjusts the signal level of the CONTROL ROOM and the HEADPHONE outputs which are fed by theTAPE IN, SOLO, PFL, GROUPS 1 through 4, or the MAIN MIX L R busses.

16. POWER INDICATORThis indicator illuminates when the Power switch is turned on.

17. TAPE IN, MAIN, GROUP 1[2]/3[4] SELECTORThese switches determine the source (TAPE IN, MAIN MIX L/R,or GROUP 1[2]/3[4]) that will provide signals to the PHONESjack, CONTROL ROOM jacks, and the OUTPUT LEVEL meters.

18. HEADPHONES OUTPUT JACK (1/4” TRS STEREO JACK)This stereo headphone output jack can be used with stereoheadphones or headphone distribution system to monitor theTAPE IN, SOLO, PFL, GROUPS 1 through 4, or the MAIN MIXL R busses. Use only stereo headphones! Use of monoheadphones may cause damage!

19. PHANTOM INDICATORThis indicator illuminates when the Phantom Power switch isturned on.

20. OUTPUT LEVEL METERTwo vertical rows of LED indicators show the output levels ofthe TAPE IN, GROUPS 1 through 4, or the MAIN MIX L Rbusses as determined by the selector switches directly belowthe meter. The “0” LED represents an output level of +4dB(rated output level).

21. SOLO/PFL INDICATORThese indicators illuminate to confirm whether SOLO or PFLhas been selected using the select button below the indicators.SOLO is selected when the indicator is Red. PFL is selectedwhen the indicator is Orange.

22. MAIN MIX L/R FADERThis fader adjusts the output signal levels of the MAIN MIX L/Routputs.

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Rear PanelRear Panel

1. POWER SWITCHThis switch turns the AC mains ON/OFF. When in the ON position, the power indicator will illuminate.

2. PHANTOM POWER SWITCHWhen this switch is in the ON position, +48V DC phantom power will be provided between pin 2 and pin 3of the MIC INPUT XLR-type jack. If you do not use microphones that require phantom power, be sure thisswitch is in the OFF position. When in the ON position, the Phantom Power indicator will illuminate. It isrecommended to turn the Phantom Power “on” with all faders in the “off” position.

3. MONO OUTPUTThis 3-conductor balanced XLR connector is the output for the MONO signal. The MONO signal is derived bycombining the Left and Right signals together.

4. GROUP 1-4 OUTPUT JACKSThese 2-conductor unbalanced 1/4” jacks are the outputs for each of the four groups.

5. AUX 1 SEND, AUX 2 SEND AND EFX SEND JACKSThese 3-conductor unbalanced “1/4” jacks are the AUX 1 and AUX 2 buss outputs. Especially the EFX Send buss output is prepared for connecting with external effects.

6. REC OUT JACKSThese stereo output jacks send the MAIN MIX L/R buss signal to a tape deck or other recording device. Thissignal is not affected by the MAIN MIX L/R faders.

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7. TAPE IN JACKSThis is an extra stereo input for a stereo source such as a tape deck or CD player. The signal is sent to theMAIN MIX L/R buss and the level is determined by the TAPE IN knob located on the Master Section.

8. CHANNEL INSERT JACKSThese Jacks are used to add other electronic devices such as effects or equalizers to the corresponding inputchannel. INSERT jacks are special connectors that function as both an output and an input at the same time.Special Insert cables are required with INSERT jacks which allow the signal to leave (send) from the mixer, goto the input of another product, and come back (return) into the mixer using the same jack.

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OperationOperationThe following explanation will instruct the user on how to operate the controls and make adjustments. Experienceand patience are required in most cases to get the system to sound good and to fully appreciate the capabilitiesof the mixing console.

Begin by reading the “Short Form” instructions. The short form section is provided for operators that do notrequire extensive instructions. Novices will benefit from reading the Short Form instructions but will find theOperation information most helpful. The Operation information provides the foundation for building operatingskills and techniques that can result in proficient console operation.

These instructions are written in operational order and do not necessarily follow the physical layout of theconsole.

SWITCH THE AC MAINS POWER OFF

Connecting the Main outputsThe MAIN MIX L/R output connectors are used to connect the console (as a source) to an input of anotherdevice. Your application (recording or live) and system configuration will determine the device the mixer isconnected to. Referring to the “Applications” section of this manual may be helpful in identifying yourapplication and configuration.

In a Live application (like the mono church system described later in the PAN explanation), the Left and Rightoutputs (or just the Left) may feed an external equalizer. The Left output of the equalizer would then feed acrossover or amplifier and then the amplified signal would feed the Main speaker. The Right output may beconnected to a tape recorder with a “y” cable to feed both the Left and Right inputs of the recorder. An equalizeris not required between the console and the tape recorder. Other external electronic devices (such asCompressor/Limiters) may also be added to this signal path. These should be connected according to theirinstructions to the circuit between the console and the equalizer.

Connecting the source to the input of a channel:One Mono source (or one output channel of a stereo source) may be connected to the appropriate inputconnector of a Mono input channel. The 3-conductor XLR connector is labeled MIC but may be used for a Mic orLine level input. The same is true for the 2-conductor 1/4” jack, but most microphones featuring 1/4” connectorsare non-professional and should be avoided. Some electronic sources have a selectable Mic/Line output, eitheris acceptable. Connect a source to either connector on one of the input channels. Stereo inputs have two 1/4”jack connectors, one for Left and one for Right. Connecting a Mono source to the Left (L/MONO) input willapply the signal to both the Left and the Right channel however it will not be true stereo.

Lower the slide faders all the way down to the minimum position and switch the AC mains power ON.

Set the input gain using the TRIM control:Make sure the various sources are providing signals (if the signal is from a microphone, have someone speak orsing into it; if the signal is from a tape deck or CD player, make sure a tape or CD is playing). Turn the TRIMknob (left or right) so that the PEAK indicator is not illuminated (or flashes only on occasion). What you have just

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done by adjusting the TRIM control, is to adapt the signal strength of your source to the mixing console inputnormal signal level capability. Remember that condenser microphones require Phantom Power voltage tooperate. The console can provide this voltage by switching ON the Phantom Power switch located on the rear ofthe console.

PAN (BAL on stereo inputs)This knob will determine the signal level of the source in the Main Mix L R and Group outputs. To position thesource in the Left, Group 1, and Group 3 outputs only turn the knob completely counter-clockwise. To positionthe source in the Right Group 2, and Group 4 outputs only turn the knob completely clockwise. To have equalamounts of the source in the outputs adjust the knob so that it is centered between the Left and Right position. Insome live applications, like many church systems, the Main outputs drive mono systems. In this case, the Leftchannel may be used to feed the speaker (L for loudspeaker) while the Right channel feeds the mono recording(R for record). In this way the PAN offers separate signal level control for the main speaker system and therecording device. For example: in a small room the volume coming directly from a piano can be heard by thecongregation without the assistance of the sound system. However, without the sound system the signal from thepiano has no way of being included in the recording. Place a microphone in or near the piano and turn thePAN to R (for record). Now the microphone signal from the piano is in the recording but not the main speaker. Ifyou decide that a little sound from the piano in the main speaker is appropriate you may turn the PAN a little tothe Left (for loudspeaker) without affecting the recording (unless you turn it more than half way). If you are notsure how this should be set for your system, turn it to the center so equal amounts are sent to the left and rightoutputs.

FADERAll the way down is off, all the way up is too much signal, and the “0” position is optimum during normaloperation. Depress the L/R select button located next to a channel fader that has an input signal (a tape deck orCD player is more appropriate than a microphone for initial setup). Then increase the level of the Main Mix L Rfaders to the “0” position (no sound will be heard yet). Slowly increase the input channel. Stop increasing whenyou have attained the desired level. Slowly repeat this process for the remaining input channel faders that havesignal. Faders for unused input channels should remain all the way down. By positioning each input channelfader relative to the other input channel faders you are mixing the signals. Most applications require differentlevels on each input. Adjust the faders so that the mixed signal sounds good (not so the position of the faderslook good). This would be a good time to go back and check the TRIM settings. Any channels that have thefaders near maximum (above “0”) could probably benefit from having the TRIM control adjusted slightly toreduce the signal level. Make sure that the PEAK indicator does not illuminate excessively in this new position. Ifthe fader seems too sensitive and the operating position is near the bottom, try adjusting the TRIM control toincrease the fader’s range of motion. Keep in mind that adjusting the TRIM will affect all (pre and post) sendsignals leaving the channel. Adjustments to the fader will only affect Post-fader sends.

Input channel faders determine the level of each input relative to other inputs. The Main Mix L R faders determinethe system level.

Your mixing console is operational at this point. Take some time to familiarize yourself with the basics that youhave just learned or continue reading if you are ready to learn more.

Control RoomThis is most useful when the operator cannot hear the output of the mixer such as in a recording or broadcast

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application. Use these output connectors to feed powered monitor speakers (or an amplifier and speakers)positioned near the operator. After making the connections set the levels using the CONTROL ROOM/HEADPHONES knob so that the volume from the speakers (or in the headphones) represents the system level. The fourswitches below the OUTPUT LEVEL METERS determine the source of the CONTROL ROOM outputs and theHEAD PHONE jack. The CONTROL ROOM feature normally is not used in a live application where the operatorcan hear the main speaker system directly. Headphones may be used in either Live or Recording applicationsbut are more common in Live.

SOLO/PFLDepressing this button (located on the channel) sends the channel signal to the CONTROL ROOM andHEADPHONES outputs as well as the meters without interrupting any other setting or signal path. This is aconvenient way to isolate to a particular input from a mixed signal. More than one input can be in theSOLO/PFL buss at one time. Remember, having everything in SOLO/PFL defeats the purpose of the SOLO/PFLfeature. The PFL/SOLO button (located near the meters) determines whether the signal is being monitored SOLO(post-fader) or PFL (pre-fader) through the headphone outputs and “Control Room” outputs.

TAPE IN CONTROLThe TAPE IN input signal is routed directly to the MAIN MIX L R busses and the CONTROL ROOM outputwithout the option of Equalization, PAN, or routing to an AUX buss. This allows the Stereo and Mono inputchannels to be reserved for inputs which can benefit from the features those channels provide.

Using Digital EffectsMusical and theatrical performances can often benefit from adding some form of special effects. If donecorrectly, a small amount of special effects may make music vocals sound more professional or create theperception of being in a larger environment (with room reverberation). Adding special effects on speech is notrecommended because it reduces speech intelligibility (the ability for words to be understood clearly).

How to add external digital effects.By this time you will have your input sources (microphones, tape decks, etc.) connected to input channels.Identify which of these channels that you would like to add effects to (beyond that which the console can provide)such as equalization, effects, or compression. Route the source(s) to the EFX buss by turning the EFX knob to theright on that channel. The EFX buss (signal) will exit the console via the EFX SEND connector. Remember that theEFX level is controlled by the position of the EFX SEND control knob. An external device (such as effects) willhave its inputs connected to the EFX SEND (output) and its outputs connected to either AUX RTN (input). The levelof the returning signal will be controlled by the AUX RTN and sent directly to the MAIN MIX L R busses to jointhe rest of the main mix.

EqualizationIf it is determined that adjustments to an Equalizer are necessary, remember two important items: properequalization is achieved with minimal equalization; and it is better to cut than to boost (cut excessive frequenciesrather than boost weak frequencies).

Adjusting the Channel EqualizerMono inputs have a 3-band Equalizer while Stereo inputs have a 4-band equalizer. The primary function of thechannel Equalizer is to improve the tonal quality of the signal for the individual input channels. It’s best to leavethese at the “v” or center position during initial setup. After the entire system is operational you may make

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adjustments (if needed). Adjustments made on a stereo input channel will affect both the Left and Right channelsof the source.

AUX buss #1AUX 1 is one of several busses of the console. The output of this buss can be used for a variety of differentapplications including a performer’s stage monitor. This AUX buss is Pre-fader so changes to the main channelfader position will not affect the level of this AUX.

AUX buss #2AUX 2 is one of several busses of the console. The output of this buss can be used for a variety of differentapplications including sending a signal to special effects devices. This AUX buss is selectable to either Pre-faderor Post-fader for maximum flexibility. Some performers will object to the subsequent changes in their stagemonitor loudspeaker signal level resulting from a Post-fader signal so the Pre-fader setting is preferred by mostperformers.

EFX bussEFX is actually another AUX buss and is one of several busses of the console. The output of this buss isparticularly suited for use with effects devices. The EFX buss is Post-fader so changes to the main channel faderposition will also affect the level of the EFX output. The EFX output signal will typically leave the console and besent an external effects device. The output of the effects device will usually return to the console via on the AUX 1or AUX 2 RTN (return) or possibly an unused input channel.

Inserts“Insert” is a term used to describe a method of adding an external electronic device to the system. Insertingrefers to having a signal leave the console to go into the input of an external device, then out of that device andreturning back to the console that it originated from.

Proper use of an insert requires skill. An insert may require special cables and a clear understanding of signalflow and system design. Using inserts incorrectly will result in the console having no output signal, or perhapsdistortion. If you are not familiar with the use of inserts or find signal flow and system design a little confusing,you should avoid using Inserts until your system is working correctly. This will make troubleshooting Insert relatedproblems easier if you are confident that the system worked correctly before the Inserts were connected.

Inserting a device using SEND and RTN (return) connectors.The output for each AUX buss is referred to as an AUX SEND. When the outputs are used to insert an externaldevice, the AUX SEND (output) will send signal to the device. The Output connector(s) of the same externaldevice will be connected to the AUX RTN input(s) that will route the signal directly to the Main Mix L R busses. Besure to SEND and RETURN using the same aux buss number to maintain Aux buss integrity. AUX and EFX termsmay be used interchangeably in the text above except that the EFX buss does not offer a RTN. EFX will frequentlyreturn on an unused AUX RTN or an unused input channel.

Inserting a device using INSERT JACKS.“Insert Jack” is the term used to describe a single 1/4” TRS connector that is wired to function as both the outputconnector and the input connector for the purpose of inserting an external device. The objective is to accomplishthe same result as the separate SEND and RETURN function described earlier, with the only difference that theboth the SEND and RETURN connections are done within the same connector, the INSERT JACK. Although

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INSERT JACKS use a standard 3-conductor (TRS) 1/4” connector the connector itself is wired in a manner thatonly works for use as an INSERT JACK. Cables must either be custom made or purchased especially for thisapplication. The special cables will be in a “Y” configuration (not all “Y” cables are insert cables) having a totalof three connectors. One connector will be labeled “Insert” and is intended for connection to the INSERT JACKon the console. Another connector will be labeled “Insert” which will be connected to the input of the externaldevice. The remaining connector will be labeled “Insert” which will be connected to the output of the externaldevice. The console and the external device both have level controls that will provide signal level adjustments. Itmay take some experimentation to make the adjustments necessary to achieve the desired effect.

Again, it is best to avoid using Inserts until the entire system is properly connected and operating normally.

Glossary

The word “Insert” has several meanings. In one meaning, it refers to the Input Connector (the point where anexternal source enters the console). In another meaning it refers the Input Channel, the entire set of controlsaffecting the routing, level, and EQ of a single input (or both inputs in the event of a stereo input channel).

The word “Source” refers to the external device (such as a microphone) that provides a signal to the mixingconsole input. Items such as microphones, tape decks, electronic instruments, etc. are all potential sources.Various types of sources (such as Mic level or Line level devices) will have differing electrical characteristics, aswell as different characteristics (such as Mono or Stereo). Consulting the owner’s manual of the device will helpdetermine each product’s electrical and output characteristics.

The word “Pre” means “before.” In a mixing console, it refers to a signal that is before an action or effectoccurs. For example, Aux 1 is a Pre-fader signal (the AUX 1 signal precedes the input channel fader, so achange in the channel fader position does not change the signal level from the AUX 1 control). Therefore,adjustments to a channel fader have no affect on the AUX 1 signal. An EQ can also be “Pre.” If a particularsignal (or output) is Pre-EQ, adjustments to the EQ will have no effect on that signal.

The word “Post” means “after.” In a mixing console, it refers to a signal that follows an action or effect. Forexample, the Aux 2 signal is Post-fader (the AUX 2 signal follows the input channel fader, so a change in thechannel fader position changes the signal level from the AUX 2 control). Therefore, adjustments to a channelfader will adjust the level of the AUX 2 signal.

The word “Buss” refers to the section of the circuit within the console where various source signals combinetogether. Aux 1, 2, 3, 4 and Main Left, Right are all busses where various input channel signals will combinetogether.

The word “Channel” typically means Input Channel, the entire set of controls affecting the path, level, and EQ ofa single input (or both inputs of a stereo input channel). Channel may also refer to the Left or Right portion (orchannel) of a stereo signal.

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ConnectionsConnectionsInter-M products are wired to reflect accepted wiring practices used throughout the world.

Balanced XLR connectors are wired as described:Pin #1 ShieldPin #2 PositivePin #3 Negative

Balanced 1/4” TRS connectors are wired as described:Tip is PositiveRing is NegativeSleeve is Shield

Insert Points

Line Input

Headphones

UnbalancedInput/Output

AUX Send

Ring

Ring

TipTip

Sleeve

Sleeve

Send

ReturnScreen

Hot (positive)Cold (negative)

Screen

Left SignalRight Signal

Ground

Signal

Ground

3 Pole (Stereo) Jack

2 Pole (Mono) Jack

Ring TipSleeve

TipSeeve

2

1

3

Balanced Input

Hot (positive)

Hot (positive)

Sleeve

Screen

Cold (negative)

Cold (negative)

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ApplicationsApplications

Stereo Live Sound

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Block DiagramBlock Diagram

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SpecificationsSpecifications..............................................................0dB=0.775Vrms

- ELECTRICAL

Maximum Output Level(0.5% T.H.D at 1kHz)

Total Harmonic Distortion(T.H.D)

Frequency Features

Hum & Noise(Average, Rs=150Ω)

Maximum Voltage Gain

Interference(Crosstalk) at 1kHz

Mono Input Channel Gain

Stereo Input Channel Gain

Input Channel EQ

Level Meter

Peak Indicator

Graphic Equalizer

Internal Digital Effect

Phantom Power

+24dB(MIX L/R, MONO, GROUP 1~4) @600Ω+20dB(AUX SEND 1~2, EFX) @600Ω+20dB(INSERT) @10kΩ+20dB(CTRL ROOM) @600ΩOver 100mW(Headphone) @40Ω

<0.1% @+14dB 20Hz~20kHz(MIX L/R, MONO, GROUP 1~4, AUX SEND 1~2, EFX, CTRL ROOM) @600Ω

20Hz~20kHz, +1/-2dB(MIX L/R, MONO, GROUP 1~4, AUX SEND 1~2, EFX, CTRL ROOM) @600Ω

-127dB equivalent input noise-95dB residual noise(MIX L/R, MONO, GROUP 1~4, AUX SEND 1~2, EFX, CTRL ROOM) -88dB(MIX L/R, MONO, GROUP 1~4, AUX SEND 1~2, EFX, CTRL ROOM)* Master fader at nominal level and all channel assign switch OFF.

84dB MIC IN TO MIX L/R, GROUP 1~4 80dB MIC IN TO MONO 76dB MIC IN TO AUX 1 86dB MIC IN TO AUX 2(POST), EFX 90dB MIC IN TO CONTROL ROOM L/R62.2dB MIC IN TO REC L/R 54dB LINE IN TO MIX L/R, GROUP1-4 50dB LINE IN TO MONO 46dB LINE IN TO AUX 1 56dB LINE IN TO AUX 2(POST), EFX60dB LINE IN TO CONTROL ROOM L/R44dB ST IN TO MIX L/R, GROUP 1~4 40dB ST IN TO MONO 16dB AUX RETURN IN TO MIX L/R27.8dB TAPE IN TO MIX L/R

-70dB between input channels-70dB between output channels

44dB variable(-60dB ~ -16dB), (-30dB ~ +14dB)

34dB variable(-20dB ~ +14dB)

HIGH : 12kHz shelvingMID : 100~8kHz(EQ for frequency variable) peakingLOW : 80Hz shelving* Turnover/roll-off frequency: located at 3dB below the maximum amplification andattenuation point

10-segment LED x 2(+4dB output at 0dB)MIX L/R, GROUP 1~4, AUX SEND 1~2, EFX, CTRL ROOM

Input channel: turned on to 3dB before pre-fader signal clipping

9 bands (63, 125, 250, 500, 1k, 2k, 4k, 8k, 16kHz)±12dB Maximum

16 programs

+48V DC

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- GENERAL

- INPUT

Power Source

Power Consumption

Weight

Dimensions

110V–120VAC or 220–240VAC: 50/60Hz(Supplied AC mains transformer depends on country requirements)

50W

MX-1436/1436EX : 7kg MX-1836/1836EX : 8kgMX-2236/2236EX : 10kg

MX-1436/1436EX : 482(W) x 90(H) x 354(D)mm / 19(W) x 3.5(H) x 13.9(D)in MX-1836/1836EX : 556(W) x 90(H) x 354(D)mm / 21.9(W) x 3.5(H) x 13.9(D)inMX-2236/2236EX : 672(W) x 90(H) x 354(D)mm / 19(W) x 3.5(H) x 13.9(D)in

Input Connector Input Nominal Rated Input Connector TypeImpedance Impedance Level

Channel Microphone 4kΩ 50∼600Ω -60dB XLR 3-31 TypeBalanced

Channel Line 10kΩ 600Ω -20dB Phone Jack (TRS)T = Hot

R = ColdS = GND

Stereo Input 5kΩ 600Ω -20dB UnbalancedPhone Jack

Auxiliary Input(AUX Return) 10kΩ 600Ω +4dB UnbalancedPhone Jack

Mono Channel Insert Input 10kΩ 600Ω 0dB Phone Jack (TRS)T = OutR = In

S = GNDMain Stereo Insert Input 10kΩ 600Ω 0dB Phone Jack (TRS)

T = OutR = In

S = GNDTape Input(Tape In) 10kΩ 600Ω -10dBV RCA Pin Jack

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- OUTPUT

* Specifications and design subject to change without notice.

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Output Connector Output Nominal Rated Input Connector TypeImpedance Impedance Level

MIX Out L/R, MONO 150Ω 600Ω +4dB XLR 3-32 TypeGROUP 1~4 150Ω 600Ω +4dB Unbalanced

Phone JackCTRL Room Out 75Ω 600Ω +4dB Unbalanced

Phone JackAUX Output (AUX Send) 75Ω 600Ω +4dB Unbalanced

Phone JackMono Input Insert Output 600Ω 10kΩ 0dB Phone Jack (TRS)

T = OutR = In

S = GNDMain Stereo Insert Output 10kΩ 600Ω 0dB Phone Jack (TRS)

T = OutR = In

S = GNDRecord Output L/R(REC Out) 600Ω 10kΩ -10dBV RCA Pin JackHeadphone Output 100Ω 40Ω 3mW Stereo Phone Jack

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ServiceService

ProceduresEnsure the problem is not related to operator error, or system devices that are external to this unit. Informationprovided in the troubleshooting portion of this manual may help with this process. Once it is certain that theproblem is related to the product contact your warranty provider as described in the warranty section of thismanual.

SchematicA Schematic is available by contacting your warranty provider.

Parts ListA Parts List is available by contacting your warranty provider.

Variations and OptionsVariations and Options

VariationsEX models have Digital Effects and a Graphic Equalizer not found on non-EX models.

Options No optional items are available for this product. Rack mount adapters are included with the 14-input modelsonly.

WarrantyWarranty

Warranty terms and conditions vary by country and may not be the same for all products. Terms and conditionsof warranty for a given product may be determined first by locating the appropriate country which the productwas purchased in, then by locating the product type.

To obtain specific warranty information and available service locations contact Inter-M directly(in Korea or theUSA) or the authorized Inter-M Distributor for your specific country or region.

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MADE IN CHINADecember 2005 9007300230 A

Inter-M, Ltd. (Korea) began operations in 1983.

Since then, Inter-M has grown to become one of the largest manufacturers of professional audio and commercial sound electronics equipment in the world.

Inter-M has gained worldwide recognition for its own branded products, as well as private label manufacturing of electronics sold under other names (OEM).

The company is no longer just a Korean company, but rather a global company that is truly international in scope, with factories and offices in Korea and China, and sales and marketing operations located in Japan, Europe, and the U.S.A.

With more than 850 employees around the globe,Inter-M is well-poised for further growth and expansion.

INTER-M AMERICAS, INC. 1 EAST BEACON LIGHT LANE CHESTER, PA USA 19013-4409TEL : 1-610-874-8870, FAX : 1-610-874-8890Home Page : http://www.inter-m.net, E-mail : [email protected]

INTER-M CorporationSEOUL OFFICE:653-5 BANGHAK-DONG, DOBONG-KU, SEOUL, KOREA TEL : 82-2-2289-8140~8, FAX : 82-2-2289-8149Home Page : http://www.inter-m.com, E-mail : [email protected]

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interm mx 2236 ex operation manual english

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