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MIXING MIXING CONSOLE CONSOLE Owner’s Manual Bedienungsanleitung Mode d’emploi Manual de instrucciones Features Caractéristiques Input Channels..............................................................page 12 With up to six mic/line inputs or up to four stereo inputs, the MG mixer can simultaneously connect to a wide range of devices: microphones, line-level devices, stereo synthesizers, and more. Compression.................................................................page 10 Compression increases the overall level without introducing distortion by compressing excessive peaks in the signals from microphones and guitars. AUX Sends and Stereo AUX Return............................page 14 You can use the AUX SEND jack to feed the signal sent to an external signal processor, and then return the processed stereo signal through the RETURN jack. High-quality digital effects (MG124CX).................page 16, 17 With digital effects built in, the MG124CX can deliver a wide range of sound variations all by itself. Canaux d’entrée...............................................................page 44 Avec six entrées micro/ligne ou quatre entrées stéréo maximum, la console de mixage MG peut connecter simultanément une grande variété d’appareils : micros, appareils de ligne, synthétiseurs stéréo, etc. Compression....................................................................page 42 La compression augmente le niveau général sans engendrer de distorsion en comprimant les pics excessifs des signaux des micros et des guitares. Envois AUX et retour AUX stéréo...................................page 46 Vous pouvez utiliser la prise jack AUX SEND pour envoyer le signal vers une unité de traitement de signaux externes, puis pour renvoyer le signal stéréo traité via la prise jack RETURN. Effets numériques de qualité supérieure (MG124CX)....page 48, 49 Grâce aux effets numériques intégrés, la console MG124CX peut proposer de nombreuses variations de sons. Funktionen Características Eingangskanäle............................................................Seite 28 Mit bis zu sechs Mikrofon-/Line-Eingängen oder bis zu vier Stereoeingängen können viele Geräte gleichzeitig am MGMischpult angeschlossen werden: Mikrofone, Geräte mit Leitungspegel, Stereo-Synthesizer uvm. Kompression................................................................Seite 26 Kompression erhöht den Durchschnittspegel, ohne Verzerrung hinzuzufügen, indem übermäßige Pegelspitzen der Signale von Mikrofonen oder Gitarren komprimiert werden. AUX Sends und Stereo AUX Return...........................Seite 30 Von der AUX SEND-Buchse können Sie das Signal einzeln an einen externen Signalprozessor führen, und das verarbeitete Stereosignal über die RETURN-Buchse zurück in das Pult führen. Hochwertige Digitaleffekte (MG124CX)................Seite 32, 33 Mit den eingebauten digitalen Effekten kann das MG124CX aus sich heraus eine Reihe von Klangvariationen liefern. Canales de entrada.......................................................página 60 Con un máximo de seis entradas de micrófono/línea o cuatro entradas estereofónicas, la mezcladora MG puede conectarse simultáneamente con una gran variedad de dispositivos: micrófonos, dispositivos de nivel de línea, sintetizadores estereofónicos, etc. Compresión...................................................................página 58 La compresión aumenta el nivel general sin causar distorsión, mediante la compresión del exceso de picos en las señales de los micrófonos y guitarras. Envíos AUX y retorno AUX estereofónico..................página 62 Puede utilizar la toma AUX SEND para introducir la señal enviada en un procesador de señales externo y luego devolver la señal estereofónica procesada a través de la toma RETURN (retorno). Efectos digitales de alta calidad (MG124CX)...........page 64, 65 Gracias a sus efectos digitales incorporados, la mezcladora MG124CX puede producir por sí misma una amplia gama de variaciones de sonido. EN DE FR ES  IMPORTANT NOTICE FOR THE UNITED KINGDOM Connecting the Plug and Cord IMPORTANT. The wires in this mains lead are coloured in accordance with the following code: BLUE : NEUTRAL BROWN : LIVE As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured makings identifying the terminals in your plug proceed as follows: The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK. The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED. Making sure that neither core is connected to the earth terminal of the three pin plug. • This applies only to products distributed by Yamaha-Kemble Music (U.K.) Ltd. (2 wires) FCC INFORMATION (U.S.A.) 1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT! This product, when installed as indicated in the instructions contained in this manual, meets FCC requirements. Modifications not expressly approved by Yamaha may void your authority, granted by the FCC, to use the product. 2. IMPORTANT: When connecting this product to accessories and/ or another product use only high quality shielded cables. Cable/s supplied with this product MUST be used. Follow all installation instructions. Failure to follow instructions could void your FCC authorization to use this product in the USA. 3. NOTE: This product has been tested and found to comply with the requirements listed in FCC Regulations, Part 15 for Class “B” digital devices. Compliance with these requirements provides a reasonable level of assurance that your use of this product in a residential environment will not result in harmful interference with other electronic devices. This equipment generates/uses radio frequencies and, if not installed and used according to the instructions found in the users manual, may cause interference harmful to the operation of other electronic devices. Compliance with FCC regulations does not guarantee that interference will not occur in all installations. If this product is found to be the source of interference, which can be determined by turning the unit “OFF” and “ON”, please try to eliminate the problem by using one of the following measures: Relocate either this product or the device that is being affected by the interference. Utilize power outlets that are on different branch (circuit breaker or fuse) circuits or install AC line filter/s. In the case of radio or TV interference, relocate/reorient the antenna. If the antenna lead-in is 300 ohm ribbon lead, change the lead-in to co-axial type cable. If these corrective measures do not produce satisfactory results, please contact the local retailer authorized to distribute this type of product. If you can not locate the appropriate retailer, please contact Yamaha Corporation of America, Electronic Service Division, 6600 Orangethorpe Ave, Buena Park, CA90620 The above statements apply ONLY to those products distributed by Yamaha Corporation of America or its subsidiaries. * This applies only to the MG124CX distributed by YAMAHA CORPORATION OF AMERICA, not the MG124C. 2 MG124CX/MG124C Owner’s Manual (class B)  PRECAUTIONS PLEASE READ CAREFULLY BEFORE PROCEEDING * Please keep this manual in a safe place for future reference. WARNING Always follow the basic precautions listed below to avoid the possibility of serious injury or even death from electrical shock, short-circuiting, damages, fire or other hazards. These precautions include, but are not limited to, the following: Power supply/Power cord Water warning • Only use the voltage specified as correct for the device. The required voltage is printed on the name plate of the device. • Do not expose the device to rain, use it near water or in damp or wet conditions, or place containers on it containing liquids which might spill into any openings. • Use only the specified AC power adaptor (PA-20) or an equivalent recommended by Yamaha). If you intend to use the device in an area other than in the one you purchased, the included power cord may not be compatible. Please check with your Yamaha dealer. • Never insert or remove an electric plug with wet hands. If you notice any abnormality • If the power cord or plug becomes frayed or damaged, or if there is a sudden loss of sound during use of the device, or if any unusual smells or smoke should appear to be caused by it, immediately turn off the power switch, disconnect the electric plug from the outlet, and have the device inspected by qualified Yamaha service personnel. • Do not place the power cord near heat sources such as heaters or radiators, and do not excessively bend or otherwise damage the cord, place heavy objects on it, or place it in a position where anyone could walk on, trip over, or roll anything over it. • If this device or the AC power adaptor should be dropped or damaged, immediately turn off the power switch, disconnect the electric plug from the outlet, and have the device inspected by qualified Yamaha service personnel. Do not open • Do not open the device or attempt to disassemble the internal parts or modify them in any way. The device contains no user-serviceable parts. If it should appear to be malfunctioning, discontinue use immediately and have it inspected by qualified Yamaha service personnel. CAUTION Always follow the basic precautions listed below to avoid the possibility of physical injury to you or others, or damage to the device or other property. These precautions include, but are not limited to, the following: • Do not use the device in the vicinity of a TV, radio, stereo equipment, mobile phone, or other electric devices. Doing so may result in noise, both in the device itself and in the TV or radio next to it. Power supply/Power cord • Remove the electric plug from the outlet when the device is not to be used for extended periods of time, or during electrical storms. • When removing the electric plug from the device or an outlet, always hold the plug itself and not the cord. Pulling by the cord can damage it. Connections • Before connecting the device to other devices, turn off the power for all devices. Before turning the power on or off for all devices, set all volume levels to minimum. • To avoid generating unwanted noise, make sure there is 50cm or more between the AC power adaptor and the device. • Do not cover or wrap the AC power adaptor with a cloth or blanket. Handling caution Location • When turning on the AC power in your audio system, always turn on the power amplifier LAST, to avoid speaker damage. When turning the power off, the power amplifier should be turned off FIRST for the same reason. • Before moving the device, remove all connected cables. • When setting up the device, make sure that the AC outlet you are using is easily accessible. If some trouble or malfunction occurs, immediately turn off the power switch and disconnect the plug from the outlet. • Do not insert your fingers or hands in any gaps or openings on the device. • Avoid setting all equalizer controls and faders to their maximum. Depending on the condition of the connected devices, doing so may cause feedback and may damage the speakers. • Avoid inserting or dropping foreign objects (paper, plastic, metal, etc.) into any gaps or openings on the device If this happens, turn off the power immediately and unplug the power cord from the AC outlet. Then have the device inspected by qualified Yamaha service personnel. • Do not expose the device to excessive dust or vibrations, or extreme cold or heat (such as in direct sunlight, near a heater, or in a car during the day) to prevent the possibility of panel disfiguration or damage to the internal components. • Do not use the device or headphones for a long period of time at a high or uncomfortable volume level, since this can cause permanent hearing loss. If you experience any hearing loss or ringing in the ears, consult a physician. • Do not place the device in an unstable position where it might accidentally fall over. • Do not rest your weight on the device or place heavy objects on it, and avoid use excessive force on the buttons, switches or connectors. (5)-4 MG124CX/MG124C Owner’s Manual 3  XLR-type connectors are wired as follows (IEC60268 standard): pin 1: ground, pin 2: hot (+), and pin 3: cold (-). Insert TRS phone jacks are wired as follows: sleeve: ground, tip: send, and ring: return. Yamaha cannot be held responsible for damage caused by improper use or modifications to the device, or data that is lost or destroyed. Always turn the power off when the device is not in use. Even when the power switch is in the “STANDBY” position, electricity is still flowing to the device at the minimum level. When you are not using the device for a long time, make sure you unplug the power cord from the wall AC outlet. The performance of components with moving contacts, such as switches, volume controls, and connectors, deteriorates over time. Consult qualified Yamaha service personnel about replacing defective components. The MG mixer may heat up by as much as 15 to 20°C while the power is on. This is normal. Please note that the panel temperature may exceed 50°C in ambient temperatures higher than 30°C, and use caution to prevent burns. * This Owner’s Manual applies to both the MG124CX and MG124C. The main difference between the two models is that the MG124CX includes digital effects while the MG124C has no internal effects. * In this manual the term “MG mixsers” refers to both the MG124CX and MG124C. In cases where different features need to be described for each model, the MG124CX feature will be described first, followed by the MG124C feature in brackets: MG124CX (MG124C). * Illustrations herein are for explanatory purposes only, and may not match actual appearance during operation. * Company names and product names herein are trademarks or registered trademarks of their respective companies. Copying of commercially available music or other audio data for purposes other than personal use is strictly prohibited by copyright law. Please respect all copyrights, and consult with a copyright specialist if you are in doubt about permissible use. Specifications and descriptions in this owner’s manual are for information purposes only. Yamaha Corp. reserves the right to change or modify products or specifications at any time without prior notice. Since specifications, equipment or options may not be the same in every locale, please check with your Yamaha dealer. 4 MG124CX/MG124C Owner’s Manual  Introduction Thank you for your purchase of the YAMAHA MG124CX/MG124C mixing console. The MG124CX/ MG124C feature input channels suitable for a wide range of usage environments. And the MG124CX includes high-quality built-in digital effects that can provide some very serious sound. The mixer combines ease of operation with support for multiple usage environments. Please read through this manual carefully before beginning use, so that you will be able to take full advantage of this mixer’s superlative features and enjoy trouble-free operation for years to come. Contents Introduction .......................................... 5 Contents ................................................................. 5 Before Turning on the Mixer ................................... 5 Turning the Power On............................................. 5 Before Turning on the Mixer 1 Be sure that the mixer’s power switch is in the STANDBY position. CAUTION ■ Mixer Basics Quick Guide.......................................... 6 Making the Most of Your Mixer........... 8 2 Use only the PA-20 adaptor included with this mixer. Use of a different adaptor may result in equipment damage, overheating, or fire. Connect the power adaptor to the AC ADAPTOR IN connector (1) on the rear of the mixer, and then turn the fastening ring clockwise (2) to secure the connection. Balanced, Unbalanced—What’s the Difference?.... 8 Signal Levels and the Decibel ................................ 8 To EQ or Not to EQ ................................................ 9 Ambience.............................................................. 10 The Modulation Effects: ........................................ 10 Phasing, Chorus, and Flanging ............................ 10 Compression......................................................... 10 2 1 ■ Reference Setup ................................................... 11 Front & Rear Panels........................... 12 Channel Control Section....................................... 12 Master Control Section ......................................... 14 DIGITAL EFFECT................................................. 16 Rear Input/Output Section .................................... 16 Digital Effect Program List .................................... 17 Jack List................................................................ 17 Troubleshooting................................. 18 Specifications..................................... 67 Accessories Owner’s Manual AC power adaptor (PA-20)* * May not be included depending on your particular area. Please check with your Yamaha dealer. 3 Plug the power adaptor into a standard household power outlet. • Be sure to unplug the adaptor from the outlet when CAUTION not using the mixer, or when there are lightning storms in the area. • To avoid generating unwanted noise, make sure there is 50 cm or more between the power adaptor and the mixer. Turning the Power On Press the mixer’s power switch to the ON position. When you are ready to turn the power off, press the power switch to the STANDBY position. CAUTION Note that trace current continues to flow while the switch is in the STANDBY position. If you do not plan to use the mixer again for a long while, please be sure to unplug the adaptor from the wall outlet. MG124CX/MG124C Owner’s Manual 5  Mixer Basics Quick Guide Mixer Basics Getting Sound to the Speakers We begin by connecting a pair of speakers and generating some stereo output. Note that operations and procedures will vary somewhat according to the input devices you are using. 2 Microphones, instruments Speakers 2 Power Amp 2, 4 Monitor Speakers Headphones 1, 4 2, 4 GAIN controls 4 3 PHANTOM switch PEAK indicators Equalizer 4, 7 Level meter PAN 5 4 5 ON switches ON ON ON ON ON ON ON ON ON PFL switches ST switches 1, 6, 7 STEREO OUT Master fader 1, 7 Channel faders 1, 3 POWER switch 6 MG124CX/MG124C Owner’s Manual 1 GROUP 1-2 fader  Mixer Basics Quick Guide 1 Be sure that your mixer is turned off and that all level* controls are turned all the way down. * STEREO OUT Master Fader, Channel Fader, GROUP 1-2 Fader, Gain Control, etc. NOTE Set the equalizer and the pan controls to their t positions. 2 Turn off any other external devices, then connect microphones, instruments, and speakers. NOTE * For information on connecting external devices see the Connection Example on page 11. * Connect electric guitars and basses through an intermediary device such as a direct box, preamp, or amp simulator. Connecting these instruments directly to the MG mixer may result in degraded sound and noise. 3 5 Turn on the ON and ST switches for each channel you are using. 6 Set the STEREO OUT Master fader to the “0” position. 7 Set the Channel faders to create the desired initial balance, then adjust the overall volume using the STEREO OUT Master fader. NOTE * To use the LEVEL meter to view the level being applied to the STEREO L/R buses, set the PFL switch off ( ) and the MONITOR switch to STEREO ( ). * If the PEAK indicator lights frequently, lower the Channel faders a little to avoid distortion. To avoid damage to your speakers, power up the devices in the following order: Peripheral devices → MG mixer → power amps (or powered speakers). Reverse this order when turning power off. NOTE If you are using microphones that require phantom power, turn the MG mixer’s phantom power switch on before turning on the power to the power amp or powered speakers. See page 15 for more detail. 4 Adjust the channel GAIN controls so that the corresponding peak indicators flash briefly on the highest peak levels. NOTE To use the LEVEL meter to get an accurate reading of the incoming signal level, turn the channel PFL switch on. Adjust the GAIN controls so that the LEVEL meter indication occasionally rises above the “t” (0) level. Note that the PHONES jack outputs the pre-fader signal from all channels on which the PFL switch is ON so that those signals can be monitored via the headphones. MG124CX/MG124C Owner’s Manual 7  Mixer Basics Making the Most of Your Mixer You’ve got yourself a mixer and now you’re ready to use it. Just plug everything in, twiddle the controls, and away you go … right? Well, if you’ve done this before you won’t have any problems, but if this is the first time you’ve ever used a mixer you might want to read through this little tutorial and pick up a few basics that will help you get better performance and make better mixes. Balanced, Unbalanced—What’s the Difference? In a word: “noise.” The whole point of balanced lines is noise rejection, and it’s something they’re very good at. Any length of wire will act as an antenna to pick up the random electromagnetic radiation we’re constantly surrounded by: radio and TV signals as well as spurious electromagnetic noise generated by power lines, motors, electric appliances, computer monitors, and a variety of other sources. The longer the wire, the more noise it is likely to pick up. That’s why balanced lines are the best choice for long cable runs. If your “studio” is basically confined to your desktop and all connections are no more than a meter or two in length, then unbalanced lines are fine—unless you’re surrounded by extremely high levels of electromagnetic noise. Another place balanced lines are almost always used is in microphone cables. The reason for this is that the output signal from most microphones is very small, so even a tiny amount of noise will be relatively large, and will be amplified to an alarming degree in the mixer’s high-gain head amplifier. To summarize Balanced noise cancellation Noise Hot (+) Cold (–) Phase inversion Source Ground Cable Phase inversion Noise cancelled Receiving device Noise-free signal Microphones: Use balanced lines. Short line-level runs: Unbalanced lines are fine if you’re in a relatively noise-free environment. Long line-level runs: The ambient electromagnetic noise level will be the ultimate deciding factor, but balanced is best. Signal Levels and the Decibel Let’s take a look at one of the most commonly used units in Most professional mixers, power amplifiers, and other audio: the decibel (dB). If the smallest sound that can be heard types of equipment have by the human ear is given an arbitrary value of 1, then the + 20 dBu inputs and outputs with a loudest sound that can be heard is approximately 1,000,000 nominal level of +4 dBu. (one million) times louder. That’s too many digits to deal with 0.775 V The inputs and outputs on 0 dBu for practical calculations, and so the more appropriate “decibel” (dB) unit was created for sound-related home-use audio gear measurements. In this system the difference between the usually have a nominal level -20 dBu of –10 dBu. softest and loudest sounds that can be heard is 120 dB. This is a non-linear scale, and a difference of 3 dB actually results Microphone signal levels in a doubling or halving of the loudness. vary over a wide range -40 dBu You might encounter a number of different varieties of the dB: depending on the type of microphone and the source. dBu, dBV, dBM and others, but the dBu is the basic decibel Average speech is about unit. In the case of dBu, “0 dBu” is specified as a signal level of -60 dBu –30 dBu, but the twittering 0.775 volts. For example, if a microphone’s output level is –40 of a bird might be lower than dBu (0.00775 V), then to raise that level to 0 dBu (0.775 V) in –50 dBu while a solid bass the mixer’s preamp stage requires that the signal be amplified drum beat might produce a level as high as 0 dBu. by 100 times. A mixer may be required to handle signals at a wide range of levels, and it is necessary match input and output levels as closely as possible. In most cases the “nominal” level for a mixer’s input and outputs is marked on the panel or listed in the owner’s manual. 8 MG124CX/MG124C Owner’s Manual  Mixer Basics Making the Most of Your Mixer To EQ or Not to EQ In general: less is better. There are many situations in which you’ll need to cut certain frequency ranges, but use boost sparingly, and with caution. Proper use of EQ can eliminate interference between instruments in a mix and give the overall sound better definition. Bad EQ—and most commonly bad boost—just sounds terrible. Cut for a Cleaner Mix For example: cymbals have a lot of energy in the mid and low frequency ranges that you don’t really perceive as musical sound, but which can interfere with the clarity of other instruments in these ranges. You can basically turn the low EQ on cymbal channels all the way down without changing the way they sound in the mix. You’ll hear the difference, however, in the way the mix sounds more “spacious,” and instruments in the lower ranges will have better definition. Surprisingly enough, piano also has an incredibly powerful low end that can benefit from a bit of low-frequency roll-off to let other instruments— notably drums and bass—do their jobs more effectively. Naturally you won’t want to do this if the piano is playing solo. The reverse applies to kick drums and bass guitars: you can often roll off the high end to create more space in the mix without compromising the character of the instruments. You’ll have to use your ears, though, because each instrument is different and sometimes you’ll want the “snap” of a bass guitar, for example, to come through. The fundamental and harmonic musical instruments. frequency ranges of some Cymbal Piano Bass Drum Snare Drum Bass Guitar Trombone Trumpet 20 50 100 200 500 1k 2k 5k 10 k 20 k (Hz) Fundamental: The frequency that determines the basic musical pitch. Harmonics: Multiples of the fundamental frequency that play a role in determining the timbre of the instrument. Some Frequency Facts The lowest and highest frequencies than can be heard by the human ear are generally considered to be around 20 Hz and 20,000 Hz, respectively. Average conversation occurs in the range from about 300 Hz to about 3,000 Hz. The frequency of a standard pitchfork used to tune guitars and other instruments is 440 Hz (this corresponds to the “A3” key on a piano tuned to concert pitch). Double this frequency to 880 Hz and you have a pitch one octave higher (i.e. “A4” on the piano keyboard). In the same way you can halve the frequency to 220 Hz to produce “A2” an octave lower. Boost with Caution MID Boost Signal Level (dB) If you’re trying to create special or unusual effects, go ahead and boost away as much as you like. But if you’re just trying to achieve a goodsounding mix, boost only in very small increments. A tiny boost in the midrange can give vocals more presence, or a touch of high boost can give certain instruments more “air.” Listen, and if things don’t sound clear and clean try using cut to remove frequencies that are cluttering up the mix rather than trying to boost the mix into clarity. One of the biggest problems with too much boost is that it adds gain to the signal, increasing noise and potentially overloading the subsequent circuitry. MID Flat LOW Boost HIGH Boost LOW Flat HIGH Flat LOW Cut HIGH Cut MID Cut Frequency (Hz) MG124CX/MG124C Owner’s Manual 9  Mixer Basics Making the Most of Your Mixer Ambience Your mixes can be further refined by adding ambience effects such as reverb or delay. The MG’s internal effects can be used to add reverb or delay to individual channels in the same way as external effects processors. (Refer to page 16). Reverb and Delay Time The optimum reverb time for a piece of music will depend on the music’s tempo and density, but as a general rule longer reverb times are good for ballads, while shorter reverb times are more suited to up-tempo tunes. Delay times can be adjusted to create a wide variety of “grooves”. When adding delay to a vocal, for example, try setting the delay time to dotted eighth notes corresponding to the tune’s tempo. Reverb Tone Different reverb programs will have different “reverb tone” due to differences in the reverb time of the high or low frequencies. Too much reverb, particularly in the high frequencies, can result in unnatural sound and interfere with the high frequencies in other parts of the mix. It’s always a good idea to choose a reverb program that gives you the depth you want without detracting from the clarity of the mix. Reverb Level It’s amazing how quickly your ears can lose perspective and fool you into believing that a totally washed-out mix sounds perfectly fine. To avoid falling into this trap start with reverb level all the way down, then gradually bring the reverb into the mix until you can just hear the difference. Any more than this normally becomes a “special effect.” For chorus and flanging the signal is delayed by several milliseconds, with the delay time modulated by an LFO, and recombined with the direct signal. In addition to the phasing effect described above, the delay modulation causes a perceived pitch shift which, when mixed with the direct signal, results in a harmonically rich swirling or swishing sound. The difference between chorus and flanging effects is primarily in the amount of delay time and feedback used—flanging uses longer delay times than chorus, whereas chorus generally uses a more complex delay structure. Chorus is most often used to thicken the sound of an instrument, while flanging is usually used as an outright “special effect” to produce otherworldly sonic swoops. Compression One form of compression known as “limiting” can, when properly used, produce a smooth, unified sound with no excessive peaks or distortion. A common example of the use of compression is to “tame” a vocal that has a wide dynamic range in order to tighten up the mix. With the right amount of compression you’ll be able to clearly hear whispered passages while passionate shouts are still well balanced in the mix. Compression can also be valuable on bass guitar. Too much compression can be a cause of feedback, however, so use it sparingly. Most compressors require several critical parameters to be set properly to achieve the desired sound. The MG compressor makes achieving great sound much easier: all you need to do is set a single “compression” control and all of the pertinent parameters are automatically adjusted for you. OUTPUT The Modulation Effects: Phasing, Chorus, and Flanging All of these effects work on basically the same principle: a portion of the audio signal is “timeshifted” and then mixed back with the direct signal. The amount of time shift is controlled, or “modulated”, by an LFO (Low-frequency Oscillator). For phasing effects the shift is very small. The phase difference between the modulated and direct signals causes cancellation at some frequencies and reinforces the signal at others and this causes the shimmering sound we hear. 10 MG124CX/MG124C Owner’s Manual (Min) (Max) INPUT  Reference Setup Reference Guitar Powered Speakers Synthesizer Foot Switch (YAMAHA FC5) Bass Recorder Microphone CD Player DI Effect Processor (exciter) Effect Processor Headphones Powered Monitor Speaker Powered Monitor Speakers MG124CX MG124CX/MG124C Owner’s Manual 11  Reference Front & Rear Panels The following applies to both the MG124CX and MG124C. In cases where different features need to be described for each model, the MG124CX feature will be described first, followed by the MG124C feature in brackets: MG124CX (MG124C). Channel Control Section 1 MIC Input Jacks (CHs 1 to 4, 5/6, 7/8) Channels 1 to 4 (Monaural) 1 Channels 5/6 and 7/8 (Stereo) 1 Channels 9/10 and 11/12 (Stereo) These are balanced XLR-type microphone input jacks (1:Ground; 2:Hot; 3:Cold). 2 LINE Input Jacks (CHs 1 to 4) These are balanced TRS phone-jack line inputs (T:Hot; R:Cold; S:Ground). You can connect either balanced or unbalanced phone plugs to these jacks. 4 3 LINE Input Jacks (CHs 5/6 to 11/12) 2 3 These are unbalanced phone-jack stereo line inputs. 3 4 LINE Input Jacks (CHs 9/10, 11/12) 5 These are unbalanced stereo RCA pin jacks. NOTE 6 6 7 7 Where an input channel provides both a MIC input jack and a LINE input jack, or a LINE input jack and an RCA pin jack, you can use either jack but not both at the same time. Please connect to only one jack on each channel. 5 INSERT Jacks (CHs 1 to 4) 8 9 9 0 0 Each of these jacks provides an insert point between the equalizer and fader of the corresponding input channel (CHs 1 to 4). The INSERT jacks can be used to independently connect devices such as graphic equalizers, compressors, or noise filters into the corresponding channels. These are TRS (tip, ring, sleeve) phone jacks that carry both the send and return signal (tip = send/out; ring = return/in; sleeve = ground). 0 NOTE A A A B C B C B C D D D Patching external devices via an INSERT jack requires a special insert cable such as illustrated below (insert cable sold separately). To the input jack of the external processor To the INSERT I/O jack E ON E ON E F F F G G G H H H ON Sleeve Sleeve(Ground) (Ground) Ring: IN Tip: OUT Tip: OUT Tip: IN To the output jack of the external processor CAUTION The signal output from the INSERT jacks is reverse-phased. This should not be a problem when connecting to an effect unit, but please be aware of the possibility of phase conflict when connecting to other types of device. 6 GAIN Control I I I MG124CX 12 MG124CX/MG124C Owner’s Manual Adjusts the input signal level. To achieve the best balance between S/N ratio and dynamic range, adjust the level so that the PEAK indicator 9 lights only occasionally and briefly on the highest input transients. The –60 to –16 scale is the MIC input adjustment range. The –34 to +10 scale is the LINE input adjustment range.  Reference Front & Rear Panels 7 C EFFECT (AUX2) Controls Switch (High Pass Filter) This switch toggles the HPF on or off. To turn the HPF on, press the switch in ( ). The HPF cuts frequencies below 80 Hz (the HPF does not apply to the line inputs of stereo input channels 34). 8 COMP Control Adjusts the amount of compression applied to the channel. As the knob is turned to the right the compression ratio increases while the output gain is automatically adjusted accordingly. The result is smoother, more even dynamics because louder signals are attenuated while the overall level is boosted. NOTE Avoid setting the compression too high, as the the higher average output level that results may lead to feedback. 9 PEAK Indicator The peak level of the post-EQ signal is detected, and the PEAK indicator lights red when the level reaches 3 dB below clipping. For XLR-equipped stereo input channels (5/6 and 7/8), both the post-EQ and post-mic-amp peak levels are detected, and the indicator lights red if either of these levels reaches 3 dB below clipping. Adjusts the level of the signal sent from the channel to the EFFECT (AUX2) bus. Note that the signal level sent to the bus is also affected by the Channel fader. On stereo channels (5/6, 7/8, 9/10, or 11/12), the signals from the L (odd) and R (even) channels are mixed and then sent to the EFFECT (AUX2) bus. D PAN Control (1 to 4) PAN/BAL Control (5/6 and 7/8) BAL Control (9/10 and 11/12) The PAN control determines the stereo positioning of the channel signal on the Group 1 and 2 buses or on the Stereo L and R buses. The BAL control knob sets the balance between left and right channels. Signals input to the L input (odd channel) go to the Group 1 bus or to the Stereo L bus; signals input to the R input (even channel) go to the Group 2 bus or the Stereo R bus. NOTE 0 Equalizer (HIGH, MID, and LOW) This three-band equalizer adjusts the channel’s high, mid, and low frequency bands. Channels 9/10 and 11/12 have two bands: high and low. Setting the knob to the t position produces a flat response in the corresponding band. Turning the knob to the right boosts the corresponding frequency band, while turning to the left attenuates the band. The following table shows the EQ type, frequency, and maximum cut/boost for each of the three bands. Band Type Frequency HIGH Shelving 10 kHz MID Peaking 2.5 kHz LOW Shelving 100 Hz Maximum Cut/Boost ±15 dB E ON Switch Turn this switch on to send the signal to the buses. The switch lights orange when on. F PFL (Pre-Fader Listen) Switch This switch lets you monitor the channel’s pre-fader signal. Press the switch in ( ) so that it lights to turn it on. When the switch is on the channel pre-fader signal is output to the PHONES and MONITOR OUT I jacks for monitoring. G 1-2 Switch This switch assigns the channel’s signal to the Group 1 and 2 buses. NOTE A AUX (AUX1) Control Adjusts the level of the signal sent from the channel to the AUX (AUX1) bus. The knob should generally be set close to the t position. On stereo channels, the signals from the L (odd) and R (even) channels are mixed and sent to the AUX (AUX1) bus. NOTE To send the signal to the buses set the ON switch to on ( ). B AUX PRE Switch Selects whether the pre-fader or the post-fader signal is fed to the AUX (AUX1) bus. If the switch is on ( ), the mixer sends the pre-fader signal (the signal immediately prior to the Channel fader I) to the AUX (AUX1) bus, so that AUX (AUX1) output is not affected by the fader. If the switch is off ( ) the mixer sends the post-fader signal to the AUX (AUX1) bus. On channels where this knob provides both PAN and BAL control (channels 5/6 and 7/8), the knob operates as a PAN control when input is received via the MIC jack or L (MONO) input only, and as a BAL control when input is received via both L and R inputs. To send the signal to the Group buses engage the ON switch ( ). H ST Switch This switch assigns the channel’s signal to the Stereo L and R buses. NOTE To send the signal to the Stereo buses engage the ON switch ( ). I Channel Fader Adjusts the level of the channel signal. Use these faders to adjust the balance between the various channels. NOTE Set the fader sliders for unused channels all the way down to minimize noise. MG124CX/MG124C Owner’s Manual 13  Reference Front & Rear Panels Master Control Section 2 1 2TR IN Jacks These RCA pin jacks can be used to input a stereo sound source. Use these jacks when you want to connect a CD player directly to the mixer. NOTE 1 5 3 2 REC OUT (L, R) Jacks These RCA pin jacks can be connected to an external recorder such as an MD recorder in order to record the same signal that is being output via the STEREO OUT jacks. NOTE 7 4 6 8 You can adjust the signal level using the 2TR IN control in the Master Control section. The mixer’s STEREO OUT Master Fader has no affect on the signal output via these jacks. Be sure to make appropriate level adjustments at the recording device. 3 RETURN L (MONO), R Jacks These are unbalanced phone-jack type line inputs. The signal received by these jacks is sent to the STEREO L/R buses and the AUX (AUX1) bus. These jacks are typically used to receive the signal returned from an external effect device (reverb, delay, etc.). NOTE B 9 These jacks can also be used as an auxiliary stereo input. If you connect to the L (MONO) jack only, the mixer will recognize the signal as monaural and will send the identical signal to both the L and R jacks. 4 SEND Jacks • AUX (AUX1) 0 C This is an impedance balanced* phone-jack type output. This jack outputs the signals from AUX (AUX1) bus. You can use this jack, for example, to connect to an effect unit, cue box, or other monitoring system. • EFFECT (AUX2) A This is an impedance balanced* phone-jack type output that outputs the signal from the EFFECT (AUX2) bus. You can use this jack, for example, to connect to an external effect unit. D 5 STEREO OUT (L, R) Jacks These jacks deliver the mixer’s stereo output. You can use these jacks, for example, to connect to the power amplifier driving your main speakers. You can also connect these jacks to a recording device when you wish to record mixer’s stereo output while using the STEREO OUT Master fader for level control. E G • XLR jacks XLR-type balanced output jacks. • LINE jacks TRS phone-jack type balanced outputs. 6 GROUP OUT (1, 2) Jacks F H These impedance-balanced* phone jacks output the Group 1/2 signals. Use these jacks to connect to the inputs of a multi-track recorder, external mixer, or other such device. 7 MONITOR OUT Jacks MG124CX * impedance balanced Since the hot and cold terminals of impedance balanced output jacks have the same impedance, these output jacks are less affected by induced noise. 14 MG124CX/MG124C Owner’s Manual Connect these stereo phone-jack outputs to your monitor system. NOTE The signal output by these jacks is determined by the MONITOR switch, the 2TR IN switch, and the PFL switches on the input channels.  Reference Front & Rear Panels 8 PHONES Jack D MONITOR/PHONES Connect a pair of headphones to this stereo phone jack. The PHONES jack outputs the same signal as the MONITOR OUT jacks. • MONITOR Switch If this switch is set to GROUP ( ), the Group 1/2 bus signals are sent to the MONITOR OUT jacks, the PHONES jack, and the level meter. If it is set to STEREO ( ), the STEREO L/R bus signals are sent to these jacks and the level meter. 9 PHANTOM +48 V Switch This switch toggles phantom power on and off. When the switch is on the mixer supplies +48V phantom power to all channels that have XLR mic input jacks (CHs 1–4, 5/6, 7/8). Turn this switch on when using one or more phantom-powered condenser microphones. NOTE When this switch is on the mixer supplies DC +48 V power to pins 2 and 3 of all XLR-type MIC INPUT jacks. • CAUTION • • • MONITOR Control Controls the level of the signal output to the PHONES jack and the MONITOR OUT jacks. E 2TR IN • 2TR IN Switch If this switch is set to TO MONITOR ( ), the signals input via the 2TR IN jacks are sent to the MONITOR OUT jacks, the PHONES jack, and the level meter. If it is set to TO STEREO ( ), the signals are sent to the STEREO L/R buses. Be sure to leave this switch off ( ) if you do not need phantom power. When tuning the switch on ( ), be sure that only condenser mics are connected to the XLR input jacks (CHs: 1 to 7/8). Devices other than condenser mics may be damaged if connected to the phantom power supply. Note, however, that the switch may be left on when connecting to balanced dynamic microphones. To avoid damage to speakers, be sure to turn off amplifiers (or powered speakers) before turning this switch on or off. We also recommend that you turn all output controls (STEREO OUT Master Fader, GROUP 1-2 Fader, etc.) to their minimum settings before operating the switch to avoid the risk of loud noises that could cause hearing loss or device damage. • 2TR IN control Adjusts the level of the signal sent from the 2TR IN jacks to the STEREO L/R buses. The following illustration shows how the switch settings correspond to the signal selection. Switches MONITOR/ PHONES PFL ON — — Adjusts the level at which the signal received at the RETURN jacks (L (MONO) and R) is sent to the STEREO L/R buses. NOTE If you supply a signal to the RETURN L (MONO) jack only, the mixer sends the same signal to both the L and R Stereo buses. A Master SEND • Master AUX (AUX1) Control PFL STEREO (+ 2TR IN) STEREO TO MONITOR STEREO + 2TR IN * OFF TO STEREO • AUX (AUX1) Control • STEREO Control 2TR IN TO STEREO 0 RETURN Adjusts the level at which the L/R signal received at the RETURN jacks (L (MONO) and R) is sent to the AUX (AUX2) bus. Signals output via the MONITOR/PHONES jacks GROUP GROUP TO MONITOR GROUP (+ 2TR IN) * : When overdubbing, you can adjust the levels of the monitor playback signal and the signal being recorded separately. MONITOR MIX Signal Flow 2TR IN Playback signal 2TR IN Control MONITOR/PHONES Controls STEREO buses Recording signal MONITOR/ PHONES jacks STEREO OUT Master Fader Adjusts the signal level sent to the AUX (AUX1) SEND jack. REC OUT • Master EFFECT (AUX2) Control Adjusts the level of the signal sent to the EFFECT (AUX2) bus. NOTE If you are using the MG124CX, the Master EFFECT control does not affect the level of the signal sent from the EFFECT bus to the internal digital effect processor. B POWER Indicator This indicator lights when the mixer’s power is ON. C Level Meter This LED meter displays the level of the signal selected by the MONITOR switch D, 2TR IN switch E and PFL switch. The “0” segment corresponds to the nominal output level. The PEAK segment lights red when the output reaches the clipping level. NOTE If the input channel PFL switch is on ( ), then only the PFL output from that channel is sent to the C-R OUT jacks, PHONES jacks, and level meter. F GROUP 1-2 Fader Adjusts the signal level sent to the GROUP OUT jacks. G ST Switch If this switch is on ( ), the signals are sent to the STEREO L/R buses via the GROUP 1-2 fader F. The Group 1 signal goes to Stereo L and the Group 2 signal goes to Stereo R. H STEREO OUT Master Fader Adjusts the signal level sent to the STEREO OUT jacks. MG124CX/MG124C Owner’s Manual 15  Reference Front & Rear Panels DIGITAL EFFECT *Only the MG124CX has digital effects. 1 FOOT SWITCH Jack A YAMAHA FC5 foot switch (sold separately) can be connected to this jack and used to toggle the digital effects ON and OFF. 1 2 2 PROGRAM Dial 3 3 PARAMETER Control Selects one of the 16 internal effects. See page 17 for details about the internal effects. Adjusts the parameter (depth, speed, etc.) for the selected effect. The last value used with each effect type is saved. 4 NOTE When you change to a different effect type, the mixer automatically restores the value that was previously used with the newly selected effect (regardless of the current position of the PARAMETER Control knob). These parameter values are reset when the power is turned off. 4 AUX Control Adjusts the level of the signal sent from the internal digital effect unit to the AUX bus. 5 ON 5 ON Switch 6 Switches the internal effect on or off. The internal effect is applied only if this switch is turned on. The switch lights orange when on. An optional YAMAHA FC5 foot switch (sold separately) can be used to toggle the digital effects ON and OFF. NOTE The ON switch lights and the internal effect unit is active by default when the power is initially turned on. 6 PFL Switch Turn this switch on to send the effect signal to the PFL bus. 7 EFFECT RTN Fader Adjusts the signal level sent from the internal digital effect unit to the STEREO bus. 7 MG124CX Rear Input/Output Section 1 POWER Switch Use this switch to turn the mixer’s power ON or to STANDBY mode. CAUTION Note that a small current continues to flow while the switch is in the STANDBY position. If you do not plan to use the mixer for a while, be sure to unplug the AC adaptor from the wall outlet. 2 AC ADAPTOR IN Connector Connect the supplied PA-20 power adaptor to this connector (see page 5). 1 16 MG124CX/MG124C Owner’s Manual 2 Use only the PA-20 adaptor included with this mixer. Use of a different adaptor may result in fire or electric shock. CAUTION  Reference Front & Rear Panels Digital Effect Program List No Program Parameter Description 1 REVERB HALL 1 REVERB TIME 2 REVERB HALL 2 REVERB TIME 3 REVERB ROOM 1 REVERB TIME 4 REVERB ROOM 2 REVERB TIME 5 REVERB STAGE 1 REVERB TIME 6 REVERB STAGE 2 REVERB TIME 7 REVERB PLATE REVERB TIME Simulation of a metal-plate reverb unit, producing a more hard-edged sound. 8 DRUM AMBIENCE REVERB TIME A short reverb that is ideal for use with kick drum. Reverb simulating a large space such as a concert hall. Reverb simulating the acoustics of a small space (room). Reverb simulating a large stage. 9 KARAOKE ECHO DELAY TIME Echo designed for karaoke (sing-along) applications. 10 VOCAL ECHO DELAY TIME Echo suitable for vocals. 11 CHORUS 1 LFO Frequency 12 CHORUS 2 LFO Frequency Creates a thick sound by modulating the delay time. The PARAMETER control adjusts the frequency of the LFO* that modulates the delay time. 13 FLANGER LFO Frequency A sweeping pitched effect. The PARAMETER control adjusts the frequency of the LFO* that modulates the delay time. 14 PHASER LFO Frequency Phase modulation produces a cyclical phasing effect. The PARAMETER control adjusts the frequency of the LFO* that modulates the delay time. 15 AUTO WAH LFO Frequency A wah-wah effect with cyclical filter modulation. The PARAMETER control adjusts the frequency of the LFO* that modulates the delay time. 16 DISTORTION DRIVE Adds a sharp-edged distortion to the sound. * “LFO” stands for Low Frequency Oscillator. An LFO is normally used to modulate another signal, determining the modulation speed and waveform shape. Jack List Input and Output Jacks MIC INPUT, STEREO OUT Polarities Pin 1: Ground Pin 2: Hot (+) Pin 3: Cold (–) LINE INPUT(CH1 to 4) GROUP OUT, STEREO OUT, MONITOR OUT, AUX (AUX1), EFFECT (AUX2)* Tip: Hot (+) Ring: Cold (–) Sleeve: Ground INSERT Tip: Output Ring: Input Sleeve: Ground PHONES Tip: L Ring: R Sleeve: Ground RETURN LINE INPUT (CH5/6 to 11/12) Tip: Hot Sleeve: Ground Configurations INPUT OUTPUT Ring Sleeve Tip Sleeve Tip * These jacks will also accept connection to monaural phone plugs. If you use monaural plugs, the connection will be unbalanced. MG124CX/MG124C Owner’s Manual 17  Reference Troubleshooting ■ Power doesn’t come on. ❑ Is the supplied power adaptor properly plugged into an appropriate AC wall outlet? ❑ Is the supplied power adaptor properly plugged into the mixer? ■ No sound. ❑ Are microphones, external devices, and speakers connected correctly? ❑ Are the ON switch and ST switch of the channels you are using turned ON? ❑ Are the channel GAIN controls, Channel fader, STEREO OUT master fader and GROUP 1-2 fader set to appropriate levels? ❑ Are the MONITOR switch and 2TR IN switch set properly? ❑ Are your speaker cables connected properly, or are they shorted? ❑ If the above checks do not identify the problem, call Yamaha for service. (Refer to the page 71 for a list of service centers.) ■ Sound is faint, dis- ❑ Are the channel GAIN controls, Channel fader, STEREO OUT master fader and GROUP 1-2 fader set to appropriate levels? ❑ Are two different instruments connected to the XLR-type and phone jacks, or to the phone and RCA pin jacks on one channel? Please connect to only one of these jacks on each channel. ❑ Is the input signal from the connected device set to an appropriate level? ❑ Are you applying the effects at an appropriate level? ❑ Are microphones connected to the MIC input jacks on channels 1 to 7/8? ❑ If you are using condenser microphones, is the PHANTOM +48 V switch turned ON? torted, or noisy. ■ No effect is applied. (If you are using MG124CX) ■ I want spoken words to be heard more clearly. ■ I want to output a monitor signal through speakers. ❑ Check that the EFFECT control on each channel is correctly adjusted. ❑ Be sure that the internal effect unit’s ON switch is turned ON. ❑ Be sure that the EFFECT PARAMETER control and EFFECT RTN fader are correctly adjusted. ❑ Be sure that the switches are ON. ❑ Adjust the equalizers (HIGH, MID and LOW) on each channel. ❑ Connect a powered speaker to the AUX (AUX1) jack* and turn the PRE switch on each channel ON. Then adjust the output signal by using the AUX (AUX1) controls on each channel and the Master SEND control. * The MG124CX feature is described first, followed by the MG124C feature in brackets: MG124CX (MG124C). 18 MG124CX/MG124C Owner’s Manual  Reference Specifications ■ Electrical Specifications Frequency Response Total Harmonic Distortion (THD + N) Hum & Noise Hum & Noise are measured with a 6 dB/octave filter @ 12.7 kHz; equivalent to a 20 kHz filter with infinite dB/octave attenuation. Crosstalk (1 kHz) Maximum voltage gain (1 kHz) All faders and controls are maximum when measured. PAN/BAL: panned hard left or hard right STEREO OUT GROUP OUT EFFECT/AUX (AUX1, 2*) SEND MONITOR OUT, REC OUT STEREO OUT GAIN: min (CHs 1-7/8) 20 Hz-20 kHz Nominal output level @1 kHz Input: CHs 1 to 11/12, RETURN, 2TR IN MIN TYP MAX UNIT –3.0 0.0 1.0 dB 0.1 % +14 dBu @ 20 Hz-20 kHz, Input GAIN Control at minimum CH INPUT 1-4 MIC EIN (Equivalent Input Noise): Rs = 150 Ω, GAIN: maximum STEREO OUT STEREO OUT, GROUP Master fader at nominal GROUP OUT level and all channels’ ST and 1-2 switches off. EFFECT/AUX Master EFFECT/AUX (AUX1, 2) control at nominal level (AUX1, 2*) SEND and all CH EFFECT/AUX (AUX1, 2) controls at minimum. STEREO OUT STEREO OUT, GROUP Master fader and one CH GROUP OUT fader at nominal level. STEREO OUT Adjacent Input Input to Output Rs = 150 Ω INPUT GAIN: maximum Residual Output Noise CHs 1-4 STEREO L/R, CHs 1-4, PAN: panned hard left or right MIC to CH INSERT OUT MIC to STEREO OUT MIC to GROUP OUT MIC to GROUP to ST MIC to REC OUT MIC to MONITOR OUT, ST TO MONITOR MIC to PHONES OUT MIC to AUX (AUX1*) SEND PRE MIC to AUX (AUX1*) SEND POST, EFFECT (AUX2*) SEND CH 5/6, 7/8 LINE to STEREO OUT CH 5/6, 7/8 LINE to GROUP OUT CH 5/6, 7/8 AUX (AUX1*) SEND PRE CH 5/6, 7/8 LINE to AUX (AUX1*) SEND POST, EFFECT (AUX2*) SEND CH 9/10, 11/12 to STEREO OUT CH 9/10, 11/12 to GROUP OUT Rs = 150 Ω RETURN to STEREO OUT RETURN to EFFECT (AUX2*) SEND Rs = 600 Ω 2TR IN to STEREO OUT MIC no load Phantom Voltage –128 –88 –81 dBu –64 –98 –70 –70 dB 60 84 94 62.2 94 83 76 86 dB 58 47 57 34 16 9 27.8 48 V ■ General Specifications Input HPF Input equalization ±15 dB maximum Turn over/roll-off frequency of shelving: 3 dB blow maximum variable level. PEAK Indicator Internal Digital Effect* LED Level Meter Power Supply Adaptor Power Consumption Dimensions (W x H x D) Net Weight CHs 1-7/8, 80 Hz, 12 dB/oct CHs 1-7/8 HIGH: 10 kHz (shelving) MID: 2.5 kHz (peaking) LOW: 100 Hz (shelving) CH 9/10-11/12 HIGH: 10 kHz (shelving) LOW: 100 Hz (shelving) Red LED turns on when post EQ signal (either post MIC HA or post EQ signal for CHs 5/6, 7/8) reaches –3 dB below clipping (+17 dBu). 16 PROGRAM, PARAMETER control Foot Switch (Digital Effect On/Off) Pre MONITOR Level 2x12 points LED meter (PEAK, +10, +6, +3, 0, –3, –6, –10, –15, –20, –25, –30 dB) PEAK lights if the signal level reaches 3 dB below the clipping level. PA-20 AC 35 VCT, 0.94 A, Cable Length = 3.6 m 30 W 346.2 mm x 86.1 mm x 436.6 mm 3.2 kg (MG124CX), 3 kg (MG124C) All faders are nominal if not specified. Output impedance of signal generator: 150 ohms * The MG124CX feature is described first, followed by the MG124C feature in brackets: MG124CX (MG124C) MG124CX/MG124C Owner’s Manual 67  Reference Specifications ■ Input Specifications Input Connectors CH INPUT MIC (CHs 1-4) Gain Input Impedance Appropriate Impedance 3kΩ 50–600Ω Mics –60 dB –16 dB –34 dB CH INPUT LINE (CHs 1-4) ST CH MIC INPUT (CHs 5/6, 7/8) ST CH LINE INPUT (CHs 5/6, 7/8) +10 dB 10kΩ 600Ω Lines 3kΩ 50–600Ω Mics –60 dB –16 dB –34 dB +10 dB 10kΩ 600Ω Lines Sensitivity * Nominal Level –80 dBu (0.078 mV) –60 dBu (0.775 mV) Max. before Clipping –40 dBu (7.75 mV) –36 dBu (12.3 mV) –16 dBu (123 mV) +4 dBu (1.23 V) –54 dBu (1.55 mV) –34 dBu (15.5 mV) –14 dBu (155 mV) –10 dBu (245 mV) +10 dBu (2.45 V) +30 dBu (24.5 V) –80 dBu (0.078 mV) –60 dBu (0.775 mV) –40 dBu (7.75 mV) –36 dBu (12.3 mV) –16 dBu (123 mV) –6 dBu (389 mV) –54 dBu (1.55 mV) –34 dBu (15.5 mV) –14 dBu (155 mV) –10 dBu (245 mV) +10 dBu (2.45 V) +30 dBu (24.5 V) ST CH INPUT (CHs 9/10, 11/12) — 10kΩ 600Ω Lines –30 dBu (24.5 mV) –10 dBu (245 mV) +10 dBu (2.45 V) CH INSERT IN (CHs 1-4) — 10kΩ 600Ω Lines –20 dBu (77.5 mV) 0 dBu (0.775 V) +20 dBu (7.75 V) Connector Specifications XLR-3-31 type (balanced [1 = GND, 2 = HOT, 3 = COLD]) TRS phone jack (balanced [Tip = HOT, Ring = COLD, Sleeve = GND]) XLR-3-31 type (balanced [1 = GND, 2 = HOT, 3 = COLD]) Phone jack (unbalanced) Phone jack (unbalanced) RCA pin jack TRS phone Jack (unbalanced [Tip = Out, Ring = In, Sleeve = GND]) Phone jack (unbalanced) 600Ω –12 dBu (195 mV) +4 dBu (1.23 V) +24 dBu (12.3 V) Lines 600Ω 2TR IN (L, R) — 10kΩ –26 dBV (50.1 mV) –10dBV (0.316V) +10dBV (3.16 V) RCA pin jack Lines Where 0 dBu = 0.775 Vrms and 0 dBV= 1 Vrms * Sensitivity : The lowest level that will produce an output of +4 dB (1.23 V), or the nominal output level when the unit is set to the maximum level. (All faders and level controls are at their maximum position.) RETURN (L, R) — 10kΩ ■ Output Specifications Output Connectors Output Impedance Appropriate Impedance Nominal Level Max. before clipping STEREO OUT (L, R) 75Ω 600Ω Lines +4dBu (1.23 V) +24 dBu (12.3 V) GROUP OUT (1, 2) 150Ω 10kΩ Lines +4dBu (1.23 V) +20 dBu (7.75 V) EFFECT/AUX (AUX1, 2*) SEND 150Ω 10kΩ Lines +4dBu (1.23 V) +20 dBu (7.75 V) CH INSERT OUT (CHs 1-4) REC OUT (L, R) 75Ω 10kΩ Lines 0 dBu (0.775 V) +20 dBu (7.75 V) 600Ω 10kΩ Lines –10 dBV (0.316 V) +10 dBV (3.16 V) MONITOR OUT (L, R) 150Ω 10kΩ Lines +4 dBu (1.23 V) +20 dBu (7.75 V) PHONES OUT 100Ω 40Ω Phones 3 mW 75 mW Connector Specifications XLR-3-32 type (balanced [1 = GND, 2 = HOT, 3 = COLD]) Phone Jack (balanced [Tip = HOT, Ring = COLD, Sleeve = GND]) Phone jack (impedance balanced [Tip = HOT, Ring = COLD, Sleeve = GND]) Phone jack (impedance balanced [Tip = HOT, Ring = COLD, Sleeve = GND]) Phone jack (unbalanced [Tip = Out, Ring = In, Sleeve = GND]) RCA pin jack Phone jack (impedance balanced [Tip = HOT, Ring = COLD, Sleeve = GND]) Stereo phone jack Where 0 dBu = 0.775 Vrms and 0 dBV= 1 Vrms * The MG124CX feature is described first, followed by the MG124C feature in brackets: MG124CX (MG124C) 68 MG124CX/MG124C Owner’s Manual  Reference Specifications ■ Dimensional Diagrams 86.1 79.6 346.2 433.9 436.6 2 Unit: mm MG124CX/MG124C Owner’s Manual 69  LINE –60dBu –50dBu –40dBu –30dBu –20dBu –10dBu 0dBu +10dBu +20dBu +30dBu HA LINE R ST CH INPUT R R L R FOOT SW EFFECT ON/OFF [–10dBV] [–7.8dBu] 2TR IN [+4dBu] RETURN L/MONO (CH9/10, 11/12) [–10dBu] L [–34 to +10dBu] CH IN MIC Gain:Max [–60dBu] CH IN LINE Gain:Max [–34dBu] CH IN MIC Gain:Min [–16dBu] HPF [6 to 50dB] GAIN Trim INV INV INV INV HA HA HA HA ST CH IN MIC Gain:Max [–60dBu] ST CH IN LINE Gain:Max [–34dBu] ST CH IN MIC Gain:Min [–16dBu] ST CH IN [–10dBu] Clip Level [0dBu] [0dBu] [0dBu] [0dBu] TH+GAIN COMP ST CH IN LINE Gain:Min [+10dBu] Clip Level HPF HPF [–34 to +10dBu] [16 to 60dB] GAIN Trim [–34 to +10dBu] LINE L/MONO CH IN LINE Gain:Min [+10dBu] (CH5/6, 7/8) ST CH INPUT [–60 to –16dBu] MIC [0dBu] INSERT I/O (CH1 to 4) [–34 to +10dBu] CH INPUT [–60 to –16dBu] HA +48V 3-Stage EQ [0dBu] 3-Stage EQ LOW 2-Stage EQ 3-Stage EQ LOW MIC MID MID HPF YE YE ON ON 2TR IN [–10dBV] CH Level [–7.8dBu] ST CH Level [Nominal:–10dB] RETURN [+4dBu] Clip Level IN RO +15V [–6dBu] PFL [–14dBu] [–6dBu] [–14dBu] EFFECT *1 [–14dBu] AUX *1 [0dBu] [0dBu] [–14dBu] G1-2 ST PFL EFFECT *1 [–14dBu] [0dBu] [0dBu] [–6dBu] AUX *1 G1-2 ST PFL AUX *1 BA AUX RETURN 2TR IN [Nominal:–6dB] [–14dBu] [0dBu] TO STEREO/TO MONITOR BA CH AUX *1 [Nominal:–6dB] PFL [–10dBu] EFFECT RETURN [0dBu] G1-2 [0dBu] ST AUX *1 ST [–6dBu] +15V PRE +15V PRE +15V 2TR IN [0dBu] BAL [0dBu] BAL/PAN PRE EFFECT *1 [0dBu] PAN EFFECT RETURN [Nominal:–10dB] ST CH AUX *1 DSP AUX [Nominal:–6dB] DIGITAL EFFECT (DSP) BA BA BA BA BA LO [–10dBu] CH Fader [–10dBu] CH Fader [-10dBu] CH Fader [0dBu] [0dBu] YE ON only MG124CX ON PARAMETER PROGRAM (1-16) Clip Level 2-Stage EQ [0dBu] YE [0dBu] PEAK RE PEAK RE PHANTOM HIGH HIGH [0dBu] LOW MG124CX/MG124C Owner’s Manual HIGH AUX *1 EFFECT *1 STEREO L STEREO R GROUP 1 GROUP 2 PFL L PFL R PFL CTRL [–6dBu] 70 RE [0dBu] INV SUM SUM BA AUX Clip Level AUX1 STEREO Master [Nominal:–10dB] GROUP OUT [+4dBu] Clip Level MG124C INV INV REC OUT [–7.8dBu] R L R L 2 1 PHONES [+4dBu] PHONES [3mW @ 40ohms] –30dBu –20dBu –10dBu 0dBu +10dBu +20dBu +30dBu [+4dBu] EFFECT SEND *1 [+4dBu] AUX SEND *1 [3mW @ 40ohms] R MONITOR OUT L [–10dBV] [–7.8dBu] REC OUT [+4dBu] ST OUT [+4dBu] GROUP OUT MONITOR OUT [+4dBu] Clip Level MONITOR/PHONES [Nominal:–16dB] STEREO OUT [+4dBu] AUX2 EFFECT FUNCTION NAME LED METER MODEL BA BA DR [–16dBu] MONITOR/PHONES LED METER [0dBu] MG124CX [–6dBu] EFFECT SEND *1 *1 DR [0dBu] [–6dBu] AUX SEND *1 GROUP Fader [Nominal:–10dB] AUX SEND *1 [+4dBu] BA TO ST BA BA STEREO Fader [–10dBu] INV MONITOR MIX [0dBu] [0dBu] SUM SUM [0dBu] [–10dBu] GROUP Fader [0dBu] [0dBu] STEREO/GROUP Clip Level SUM SUM [0dBu] AUX SEND *1 [Nominal:–6dB] SUM SUM SUM SUM Reference Specifications ■ Block Diagram and Level Diagram  For details of products, please contact your nearest Yamaha representative or the authorized distributor listed below. 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