Owner's Manual
Page 2
...;ed Yamaha service personnel. WARNING Always follow the basic precautions listed below to be used for a long period of the connected devices, doing so may cause feedback and may generate noise. If this manual in a position where anyone could walk on it, or place it , immediately turn off the power for all devices, set all equalizer controls and faders to the internal components...
...;ed Yamaha service personnel. WARNING Always follow the basic precautions listed below to be used for a long period of the connected devices, doing so may cause feedback and may generate noise. If this manual in a position where anyone could walk on it, or place it , immediately turn off the power for all devices, set all equalizer controls and faders to the internal components...
Owner's Manual
Page 3
... in all installation instructions. Cable/s supplied with these corrective measures do not produce satisfactory results, please contact the local retailer authorized to distribute this product to use only high quality shielded cables. Copying of their respective companies. IMPORTANT NOTICE FOR THE UNITED KINGDOM Connecting the Plug and Cord IMPORTANT. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT! Insert TRS phone jacks are the...
... in all installation instructions. Cable/s supplied with these corrective measures do not produce satisfactory results, please contact the local retailer authorized to distribute this product to use only high quality shielded cables. Copying of their respective companies. IMPORTANT NOTICE FOR THE UNITED KINGDOM Connecting the Plug and Cord IMPORTANT. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT! Insert TRS phone jacks are the...
Owner's Manual
Page 4
... Rack Mounting 25 Appendix 26 Specifications 26 Dimensional Diagrams 28 Block Diagram and Level Diagram 29 Input Channels page 21 With up to six mic/line inputs or up to four stereo inputs, the MG12/4FX can use , so that can use the AUX SEND jack to feed the post-fader signal to connect an external effector. External Effects, Monitor Mixes, and Groups 12 5. Phantom power enables easy connection to a wide range of the YAMAHA MG12/4FX mixing console. The mixer combines ease of setups. 4 MG12...
... Rack Mounting 25 Appendix 26 Specifications 26 Dimensional Diagrams 28 Block Diagram and Level Diagram 29 Input Channels page 21 With up to six mic/line inputs or up to four stereo inputs, the MG12/4FX can use , so that can use the AUX SEND jack to feed the post-fader signal to connect an external effector. External Effects, Monitor Mixes, and Groups 12 5. Phantom power enables easy connection to a wide range of the YAMAHA MG12/4FX mixing console. The mixer combines ease of setups. 4 MG12...
Owner's Manual
Page 6
... type of my mixer?" RCA pin jacks are always unbalanced, and generally carry a line-level signal at them. A phone jack that is set up a system for the first time might want to read through this is the first time you've ever used on the back of signal it . Phone jacks can be unbalanced mono, unbalanced stereo, balanced mono, or an insert patch point.
... type of my mixer?" RCA pin jacks are always unbalanced, and generally carry a line-level signal at them. A phone jack that is set up a system for the first time might want to read through this is the first time you've ever used on the back of signal it . Phone jacks can be unbalanced mono, unbalanced stereo, balanced mono, or an insert patch point.
Owner's Manual
Page 7
... amplified to an alarming degree in the mixer's high-gain head amplifier. To summarize: Microphones: Short line-level runs: Long line-level runs: Use balanced lines. nothing. Reverse-phase signal. Female 1-2. The longer the wire, the more than a meter or two in a relatively noise-free environment. Another place balanced lines are almost always used is likely to pick up the random electromagnetic...
... amplified to an alarming degree in the mixer's high-gain head amplifier. To summarize: Microphones: Short line-level runs: Long line-level runs: Use balanced lines. nothing. Reverse-phase signal. Female 1-2. The longer the wire, the more than a meter or two in a relatively noise-free environment. Another place balanced lines are almost always used is likely to pick up the random electromagnetic...
Owner's Manual
Page 8
... home audio equipment) usually has line inputs and outputs with a nominal (average) level of -10 dB. ● Professional audio gear usually has line inputs and outputs with a nominal level of the line so that feature a "Gain" control-such as electronic signal levels. If you feed a +4 dB signal into a -10 dB input you don't need to be an expert to describe acoustic sound pressure levels as well as the mono-channel inputs on...
... home audio equipment) usually has line inputs and outputs with a nominal (average) level of -10 dB. ● Professional audio gear usually has line inputs and outputs with a nominal level of the line so that feature a "Gain" control-such as electronic signal levels. If you feed a +4 dB signal into a -10 dB input you don't need to be an expert to describe acoustic sound pressure levels as well as the mono-channel inputs on...
Owner's Manual
Page 9
... "summed" (mixed) together here. 5 Master Fader & Level Meter A stereo, mono, or bus master fader and the mixer's main output level meter. In reality, block diagrams are attenuated. 2 Equalizer Could be several master faders depending on the design of the source. the number of the mixer's input channels are assigned to cut than boost. 3 Channel Peak LED & Fader The channel peak LED is applied the EQ stage also has gain. It's usually better to this master output or "bus"). 1 2 3 4 5 ■ Input Channel 1 Head Amp The...
... "summed" (mixed) together here. 5 Master Fader & Level Meter A stereo, mono, or bus master fader and the mixer's main output level meter. In reality, block diagrams are attenuated. 2 Equalizer Could be several master faders depending on the design of the source. the number of the mixer's input channels are assigned to cut than boost. 3 Channel Peak LED & Fader The channel peak LED is applied the EQ stage also has gain. It's usually better to this master output or "bus"). 1 2 3 4 5 ■ Input Channel 1 Head Amp The...
Owner's Manual
Page 10
... the best overall system S/N ratio, amplify the input to analog mixers in the signal path. Here's why ... The Head Amplifier "Gain" Control Is the Key! Just remember that the bigger the desired signal, the smaller the added noise will overload our channel circuitry and cause clipping. 10 MG12/4FX Making the Most Of Your Mixer 3. In tech-speak this gives...
... the best overall system S/N ratio, amplify the input to analog mixers in the signal path. Here's why ... The Head Amplifier "Gain" Control Is the Key! Just remember that the bigger the desired signal, the smaller the added noise will overload our channel circuitry and cause clipping. 10 MG12/4FX Making the Most Of Your Mixer 3. In tech-speak this gives...
Owner's Manual
Page 11
... input gain control while the signal is to their minimum: master faders, group faders (if provided), channel faders, and input gain controls. But do it . If the output level meters are defeated or bypassed. 2 Apply the source signal to do, how do we have to each active channel. 3 Raise your program material. MG12/4FX 11 Repeat for each channel one at a time: have singers sing, players play, and playback devices play back at the mixer block diagram you use...
... input gain control while the signal is to their minimum: master faders, group faders (if provided), channel faders, and input gain controls. But do it . If the output level meters are defeated or bypassed. 2 Apply the source signal to do, how do we have to each active channel. 3 Raise your program material. MG12/4FX 11 Repeat for each channel one at a time: have singers sing, players play, and playback devices play back at the mixer block diagram you use...
Owner's Manual
Page 12
... the AUX Return jack and mixed back into the mix. Pre-fader send for pre- The send signal is fed to the external effect unit-a reverb unit, for example-and the output from the main mix, and 2) to "tap" the signal flowing through your mixer at the same time. The send signal is fed to provide monitor mixes. Larger mixing consoles can have 6, 8, or even more , can handle both the AUX send level control and the channel fader. AUX sends often feature a switch that...
... the AUX Return jack and mixed back into the mix. Pre-fader send for pre- The send signal is fed to the external effect unit-a reverb unit, for example-and the output from the main mix, and 2) to "tap" the signal flowing through your mixer at the same time. The send signal is fed to provide monitor mixes. Larger mixing consoles can have 6, 8, or even more , can handle both the AUX send level control and the channel fader. AUX sends often feature a switch that...
Owner's Manual
Page 13
... can be assigned to go. Channel faders Assigned to control multiple channels faders simultaneously. Simply assign the group to a group bus, and make sure that need to maintain the same relationship-a drum mix, for example-can send the group signal to be made as quickly as possible. Channel faders Assigned to Group (Controlled As a Group) Group Fader A group of the group using a single group fader, rather than having to attempt to Stereo (Controlled Individually) Stereo Master Fader MG12/4FX 13 Making the Most Of Your Mixer 4-2.
... can be assigned to go. Channel faders Assigned to control multiple channels faders simultaneously. Simply assign the group to a group bus, and make sure that need to maintain the same relationship-a drum mix, for example-can send the group signal to be made as quickly as possible. Channel faders Assigned to Group (Controlled As a Group) Group Fader A group of the group using a single group fader, rather than having to attempt to Stereo (Controlled Individually) Stereo Master Fader MG12/4FX 13 Making the Most Of Your Mixer 4-2.
Owner's Manual
Page 14
... To the output jack of the processor. Channel Fader When a plug is inserted into the channel insert jack, the internal signal path is interrupted and sent outside the box is to the input of the external processor, and the other carries the "return" signal from the output of the external processor 14 MG12/4FX One of the mono phone jacks carries the "send" signal to be fed to use the channel inserts. Channel Inserts for Channel-speci...
... To the output jack of the processor. Channel Fader When a plug is inserted into the channel insert jack, the internal signal path is interrupted and sent outside the box is to the input of the external processor, and the other carries the "return" signal from the output of the external processor 14 MG12/4FX One of the mono phone jacks carries the "send" signal to be fed to use the channel inserts. Channel Inserts for Channel-speci...
Owner's Manual
Page 16
.... 5-4. One of the biggest problems with the mix. ■ Reverb/Delay Time Different reverb/delay units offer different capabilities, but use of low-frequency roll-off the high end to create more "spacious," and instruments in Effects Your MG mixer features a high-performance internal effect system offers extraordinary sound-processing power and versatility without compromising clarity. ■ Reverb Level It's amazing how quickly your mix. You don't want the...
.... 5-4. One of the biggest problems with the mix. ■ Reverb/Delay Time Different reverb/delay units offer different capabilities, but use of low-frequency roll-off the high end to create more "spacious," and instruments in Effects Your MG mixer features a high-performance internal effect system offers extraordinary sound-processing power and versatility without compromising clarity. ■ Reverb Level It's amazing how quickly your mix. You don't want the...
Owner's Manual
Page 18
... to output the signal to the AUX bus, so that it lights up. Front & Rear Panels 6 PRE Switch Selects whether the pre-fader or the post-fader signal is not affected by pressing it in ( ). If you set the switch off ( ) the mixer sends the post-fader signal to the AUX bus. 7 EFFECT Controls Adjusts the level of the signal being input to the EFFECT bus. To set the fader sliders for monitoring. NOTE To reduce noise, set the switch on , the mixer outputs the channel's pre-fader signal to the AUX bus.
... to output the signal to the AUX bus, so that it lights up. Front & Rear Panels 6 PRE Switch Selects whether the pre-fader or the post-fader signal is not affected by pressing it in ( ). If you set the switch off ( ) the mixer sends the post-fader signal to the AUX bus. 7 EFFECT Controls Adjusts the level of the signal being input to the EFFECT bus. To set the fader sliders for monitoring. NOTE To reduce noise, set the switch on , the mixer outputs the channel's pre-fader signal to the AUX bus.
Owner's Manual
Page 19
... the Group 2 signal goes to Stereo R. 4 Master SEND • Master AUX Control Adjusts the signal level to the corresponding AUX SEND jack. • Master EFFECT Control Adjusts the level of the signal on or off amplifiers (or powered speakers) before operating the switch, to avoid risk of the signal sent from the 2TR IN jack to the Stereo bus. 7 PHANTOM +48 V Switch This switch toggles phantom power on , the mixer supplies power to all output controls (ST master fader, GROUP 1-2 fader, etc.) to minimum settings before turning this switch is output through the EFFECT jack. We...
... the Group 2 signal goes to Stereo R. 4 Master SEND • Master AUX Control Adjusts the signal level to the corresponding AUX SEND jack. • Master EFFECT Control Adjusts the level of the signal on or off amplifiers (or powered speakers) before operating the switch, to avoid risk of the signal sent from the 2TR IN jack to the Stereo bus. 7 PHANTOM +48 V Switch This switch toggles phantom power on , the mixer supplies power to all output controls (ST master fader, GROUP 1-2 fader, etc.) to minimum settings before turning this switch is output through the EFFECT jack. We...
Owner's Manual
Page 20
Front & Rear Panels 8 Level-Meter Signal Switches (ST-GROUP Toggle Switch and 2TR IN Switch) These level-meter switches, together with the channel PFL switches, select the signal that is ON. A POWER Indicator This indicator lights up and the internal effector becomes active. • PFL Switch Set this switch is a stereo phone-type output jack. You can use of the PARAMETER Control knob). NOTE The mixer saves the last value used with each effect type. With the (separately sold) YAMAHA FC5...
Front & Rear Panels 8 Level-Meter Signal Switches (ST-GROUP Toggle Switch and 2TR IN Switch) These level-meter switches, together with the channel PFL switches, select the signal that is ON. A POWER Indicator This indicator lights up and the internal effector becomes active. • PFL Switch Set this switch is a stereo phone-type output jack. You can use of the PARAMETER Control knob). NOTE The mixer saves the last value used with each effect type. With the (separately sold) YAMAHA FC5...
Owner's Manual
Page 21
... the Master Control section. • XLR jacks XLR-type balanced output jacks. • LINE jacks TRS phone-type balanced output jacks. Use these stereo phone-type output jacks to connect to devices such as illustrated below. To the INSERT I /O jack requires a special separately-sold insertion cable such as graphic equalizers, compressors, and noise filters. This will not be used to independently connect these jacks is selected by these channels to your main speakers. NOTE The signal monitored...
... the Master Control section. • XLR jacks XLR-type balanced output jacks. • LINE jacks TRS phone-type balanced output jacks. Use these stereo phone-type output jacks to connect to devices such as illustrated below. To the INSERT I /O jack requires a special separately-sold insertion cable such as graphic equalizers, compressors, and noise filters. This will not be used to independently connect these jacks is selected by these channels to your main speakers. NOTE The signal monitored...
Owner's Manual
Page 22
... ST OUT jacks NOTE The mixer's ST Master Fader has no affect on both L and R jacks 9 REC OUT (L, R) Jacks By connecting these jacks to unplug the adaptor from the EFFECT bus. This jack outputs the signals from an external effector (reverb, delay, etc.). With the foot switch connected, you connect to the L (MONO) jack only, the mixer will be unbalanced. 22 MG12/4FX Connector Polarities MIC INPUT, ST OUT LINE INPUT (monaural channels), GROUP OUT, ST OUT, C-R OUT AUX, EFFECT * INSERT I/O PHONES...
... ST OUT jacks NOTE The mixer's ST Master Fader has no affect on both L and R jacks 9 REC OUT (L, R) Jacks By connecting these jacks to unplug the adaptor from the EFFECT bus. This jack outputs the signals from an external effector (reverb, delay, etc.). With the foot switch connected, you connect to the L (MONO) jack only, the mixer will be unbalanced. 22 MG12/4FX Connector Polarities MIC INPUT, ST OUT LINE INPUT (monaural channels), GROUP OUT, ST OUT, C-R OUT AUX, EFFECT * INSERT I/O PHONES...
Owner's Manual
Page 23
... same time. Setting Up Setting Up Setup Procedure 1 Before connecting to microphones and instruments, be sure that all devices are set all of the mixer's channel faders and master control faders are turned off the power in the following order: Peripheral devices → mixer → power amps (or powered speakers). Setup Examples NOTE Where an input channel provides both a MIC INPUT jack and a LINE INPUT jack, you may use either one of the cable to the relevant microphone or instrument and connect the...
... same time. Setting Up Setting Up Setup Procedure 1 Before connecting to microphones and instruments, be sure that all devices are set all of the mixer's channel faders and master control faders are turned off the power in the following order: Peripheral devices → mixer → power amps (or powered speakers). Setup Examples NOTE Where an input channel provides both a MIC INPUT jack and a LINE INPUT jack, you may use either one of the cable to the relevant microphone or instrument and connect the...
Owner's Manual
Page 26
...) MID: 2.5 kHz (peaking) LOW: 100 Hz (shelving) 16 programs, Parameter control FOOT switch (ON/OFF) Supplied when Phantom +48 V switch is ON. (XLR-type input jacks) On each channel: red indicator lights if post-EQ signal (on ST channels, if either post-EQ signal or post-mic-amp signal) comes within 3 dB of shelving, 3 dB below maximum variable level Internal Digital Effect Phantom Power Monaural/Stereo Input PEAK Indicator Level Meters Included Accessories Options Power Consumption Dimensions (W × H ×...
...) MID: 2.5 kHz (peaking) LOW: 100 Hz (shelving) 16 programs, Parameter control FOOT switch (ON/OFF) Supplied when Phantom +48 V switch is ON. (XLR-type input jacks) On each channel: red indicator lights if post-EQ signal (on ST channels, if either post-EQ signal or post-mic-amp signal) comes within 3 dB of shelving, 3 dB below maximum variable level Internal Digital Effect Phantom Power Monaural/Stereo Input PEAK Indicator Level Meters Included Accessories Options Power Consumption Dimensions (W × H ×...