Yamaha Mg164 Owners Manual

							Front & Rear Panels
MG16/4, MG12/4
21
8Level-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 sent through the
C-R/PHONES control to the C-R OUT jacks, the PHONES
jack, and the level meter.
The following illustration shows how the switch settings corre-
spond to the signal selection. 
1If the input channel’s PFL switch is on ( ), then only the
channel’s PFL output it sent to the C-R OUT jacks, PHONES
jacks, and level meter.
2If the 2TR IN switch is ON ( ), the signal supplied to the 2TR
IN jack is sent to the C-R OUT jacks, PHONE jacks, and level
meter. If the 2TR IN switch is OFF, then the Group or Stereo
signal is sent instead (as determined by the ST-GROUP toggle
switch).
9C-R/PHONES Control
Controls the level of the signal output to the PHONES jack and
the C-R L and R jacks.
0Level Meter
This LED display shows the level of the signal selected by the
selection switches described in 
8 above (the level to the C-R
OUT and PHONES jacks). The “0” point corresponds to the
standard output level. The indicator lights up red when the out-
put hits the clipping level.
APOWER Indicator
This indicator lights up when the mixer’s power is ON.
BPHONES jack
Connector for headphones. This is a stereo phone-type output
jack.
The signal monitored by these jacks is selected by
the settings of the ST-GROUP toggle switch, the
2TR IN switch, and the PFL switches on the input
channels.
2TR IN
2TR IN
PFL
PFL
GROUP
ST-GROUP
STON
OFF
ON
ON
OFF
OFF
C-R OUT
&
PHONES
Switch
Signal12
NOTE
MG12-16_E.book  Page 21  Monday, May 26, 2003  1:14 PM 
						

							Front & Rear Panels
MG16/4, MG12/4
22
1Channel Input jacks
•MIC jacks (MG16/4: CHs 1 to 8, 9/10, 11/12. MG12/4:
CHs 1 to 4, 5/6, 7/8)
These are balanced XLR-type microphone input jacks
(1:Ground; 2:Hot; 3:Cold).
•LINE jacks (MG16/4: CHs 1 to 8. MG12/4: CHs 1 to 4)
These are balanced TRS phone-type line input jacks (T: Hot;
R: Cold; S: Ground).
You can connect either balanced or unbalanced phone plugs
to these jacks.
Where an input channel provides both a MIC INPUT
jack and a LINE INPUT jack, you may use either
one of these jacks but you may not use both at the
same time. Please connect to only one of these
jacks on each channel.
2INSERT I/O Jacks
Each of these jacks is positioned between the equalizer and
fader of the corresponding input channel (MG16/4: CHs 1 to 8;
MG12/4: CHs 1 to 4). These jacks can be used to indepen-
dently connect these channels to devices such as graphic equal-
izers, compressors, and noise filters. These are TRS (tip, ring,
sleeve) phone jacks that support bidirectional operation.
Connection to an INSERT I/O jack requires a spe-
cial separately-sold insertion cable such as illus-
trated below.
The signal output from the INSERT I/O jacks is
reverse-phased. This will not be a problem if con-
necting the jack to an effector. If using the jack to out-
put to an external device, however, please be aware
of possible phase conflicts with other signals.
3Channel Input jacks
These are unbalanced stereo line input jacks. Two jack types
are provided: phone type (MG16/4: CHs 9/10 to 15/16;
MG12/4: CHs 5/6 to 11/12) and RCA pin type (MG16/4: CHs
13/14, 15/16; MG12/4: CHs 9/10, 11/12).
Where a channel provides both a phone jack and an
RCA pin jack, you may use either one of these jacks
but you may not use both at the same time. Please
connect to only of these jacks on each channel.
4GROUP OUT (1, 2) Jacks
These are impedance-balanced phone-type output jacks that
output the Group 1-2 signals. Use these jacks to connect to the
input jacks of an MTR, external mixer, or other such device.
5ST OUT (L, R) Jacks
These jacks deliver stereo output of the mixed signal. You use
these jacks, for example, to connect to the power amplifier
driving your main speakers. You also use these jacks when you
wish to record the signal utilizing the level control applied by
the ST fader in the Master Control section.
•XLR jacks
XLR-type balanced output jacks.
•Line jacks
TRS phone-type balanced output jacks.
6C-R OUT Jacks
Use these stereo phone-type output jacks to connect to your
monitor system.
The signal monitored by these jacks is selected by
the settings of the ST-GROUP toggle switch, the
2TR IN switch, and the PFL switches on the input
channels.
7SEND Jacks
•AUX1, AUX2
These are impedance balanced phone-type output jacks.
These jacks output the signals from the AUX1 and AUX2,
respectively. Use these jacks to output these signals to an
effector or a cue box or other such monitor system.
Rear Input/Output Section 
415
6378
AB
902
NOTE
NOTE
To the INSERT I/O jackTo the input jack of the external processor
To the output jack of the external processor  Ring Sleeve
TipSleeve
Tip
NOTE
NOTE
MG12-16_E.book  Page 22  Monday, May 26, 2003  1:14 PM 
						

							Front & Rear Panels
MG16/4, MG12/4
23
8RETURN L (MONO), R Jacks
These are unbalanced phone-type line input jacks. The signal
received by these jacks is sent to the Stereo bus and the AUX1
and AUX2 buses. These jacks are typically used to receive a
return signal from an external effector (reverb, delay, etc.).
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
propagate the identical signal on both L and R
jacks.
9REC OUT (L, R) Jacks
By connecting these jacks to an external DAT recorder or cas-
sette recorder, you can record the same signal that is being out-
put from the ST OUT jacks.
The mixer’s ST Master Fader has no affect on the
signal output from these jacks. Be sure to make
appropriate level adjustments at the recording
device side.
02TR IN Jacks
These RCA pin jacks input a stereo sound source. Use these
jacks when you want to connect a CD or DAT directly to the
mixer for monitoring.
You can adjust the signal level using the 2TR IN
control in the Master Control section. 
APOWER Switch
Use this switch to set mixer power to ON or STANDBY.
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, be sure to
unplug the adaptor from the wall outlet. 
BAC ADAPTOR IN Connector
Connects to the included PA-20 power adaptor (see page 5).
Use only the PA-20 adaptor included with this mixer.
Use of a different adaptor may result in fire or electric
shock.
Connector Polarities
* These jacks will also accept connection to monaural phone plugs. If you use monaural plugs, the connection will be unbalanced.
NOTE
NOTE
NOTE
MIC INPUT, ST OUT
Pin 1: Ground
Pin 2: Hot (+)
Pin 3: Cold (–)
LINE INPUT (monaural channels),
GROUP OUT, ST OUT, C-R OUT
AUX1, AUX2 *Tip: Hot (+)
Ring: Cold (–)
Sleeve: Ground
INSERT I/OTip: Output
Ring: Input
Sleeve: Ground
PHONES
Tip: L
Ring: R
Sleeve: Ground
RETURN
LINE INPUT (stereo channels)Tip: Hot
Sleeve: Ground
INPUT OUTPUT
Ring
Sleeve Tip
Sleeve Tip
MG12-16_E.book  Page 23  Monday, May 26, 2003  1:14 PM 
						

							MG16/4, MG12/4
24
Setting Up
(1) Before connecting to microphones and instruments, be sure 
that all devices are turned off. Also be sure that all of the 
mixer’s channel faders and master control faders are set all the 
way down.
(2) For each connection, connect one end of the cable to the rele-
vant microphone or instrument and connect the other end to the 
appropriate LINE or MIC jack on the mixer. 
(LINE jacks on MG16/4: CHs 1 to 8; on MG12/4: 1 to 4. MIC 
jacks on MG16/4: CHs 1 to 8, 9/10, 11/12; on MG12/4: 1 to 4, 
5/6.)
Where an input channel provides both a MIC INPUT
jack and a LINE INPUT jack, you may use either
one of these jacks but you may not use both at the
same time. Please connect to only one of these
jacks on each channel.
(3) To avoid causing damage to speakers, power up the devices in 
the following order: Peripheral devices → mixer → power 
amps (or powered speakers).
When shutting the system down, turn off the power
in the opposite order: Power amps (powered speak-
ers) 
→ mixer → peripheral devices.
Home Recording
Setup ProcedureNOTE
NOTE
Setup Examples
Rhythm Machine 
Effector Effector 
Effector Synthesizer
MTR
Guitar
Powered Monitor 
Speakers
Master Recorder
(MD, CD-R, DAT, etc.)Sound Source (CD, MD, 
DAT, cassette, video, etc.)
MTRMicrophone
Headphones
Personal Computer
MG12-16_E.book  Page 24  Monday, May 26, 2003  1:14 PM 
						

							Setting Up
MG16/4, MG12/4
25
Sound Reinforcement for Live Performance
(      )
STAUX 1
(
PRE       )
ST
DI
DI
Microphones  Monitor Speakers
(Internal)
Power Amp
Effector
Synthesizer
EffectorBass
Guitar
CD, Cassette, or DAT 
Recorder
Microphones
HeadphonesGuitar
Main Speakers
(External)
Example of Speaker Arrangement 
Audience (External)Stage (Internal) Drums
CD Player
Power Amp
MG12-16_E.book  Page 25  Monday, May 26, 2003  1:14 PM 
						

							Setting Up
MG16/4, MG12/4
26
Mounting the MG16/4
(1) Two metal rack-mount supports are screwed onto the unit. Use
a screwdriver to remove these supports.
(2) Turn the supports over, and fasten them into place again using
the same screws.
(3) Mount the unit into the rack, and fasten it into place.
If you wish you may move the left support to the
right side and the right support to the left side, as
shown in the drawing.
Do not install the mixer near power amps or other
heat-generating devices.
Mounting the MG12/4
(1) Two metal rack-mount supports are screwed onto the unit. Use
a screwdriver to remove these supports.
(2) Turn the supports over, and fasten them into place again using
the same screws.
(3) Mount the unit into the rack, and fasten it into place.
Do not install the mixer near power amps or other
heat-generating devices.
Rack Mounting
NOTE
MG12-16_E.book  Page 26  Monday, May 26, 2003  1:14 PM 
						

							 
MG16/4, MG12/4 
27 
Appendix 
  
General Specifications 
Where 0 dBu = 0.775 V and 0 dBV = 1 V 
1
 
Measured with 12.7 kHz, –6 dB/oct. low pass filter (equivalent to 20 kHz, –  
∞  
 filter).
(CH MIC INPUT to ST, GROUP OUT/AUX, EFFECT SEND) 
2
 
Turning PAN/BAL to left or right. 
3
 
Shelving turnover/rolloff frequency: 3 dB before maximum cut or boost. 
 Specifications 
Frequency Characteristics (ST OUT) 20 Hz–20 kHz +1 dB, –3 dB @+4 dBu, 600  
Ω  
(with gain control at minimum level)
Total Harmonic Distortion (ST OUT)0.1 % (THD+N) @+14 dBu, 20 Hz–20 kHz, 600  
Ω 
 (with gain control at maximum level) 
(MG16/4 CH1-8, MG12/4 CH1-4)
Hum and Noise 
1
 
–128 dBuEquivalent input noise 150  
Ω  
(MG16/4: CHs 1 to 8, 
MG12/4: CHs 1 to 4)
–100 dBu Residual output noise (ST OUT)
–88 dBu (92 dB S/N)ST, GROUP Master fader at nominal level and all Ch 
assign SW’s off.
–81 dBu (85 dB S/N)AUX master control at nominal level; all channel mix 
controls at minimum level.
–64 dBu (68 dB S/N)ST, GROUP Master fader and one Ch fader at nominal 
level. (MG16/4 CH1–8, MG12/4 CH1–4)
Maximum Voltage Gain 
2
 
60 dB CH MIC INPUT  
→ 
 CH INSERT OUT
84 dB CH MIC INPUT  
→ 
 GROUP OUT/ST OUT (CH to ST)
94 dB CH MIC INPUT  
→ 
 ST OUT (GROUP to ST)
62.2 dB CH MIC INPUT  
→ 
 REC OUT (CH to ST)
76 dB CH MIC INPUT  
→  
AUX SEND (PRE)
86 dB CH MIC INPUT  
→ 
 AUX SEND (POST)
58 dB CH LINE INPUT  
→ 
 GROUP OUT/ST OUT (CH to ST)
84 dB ST CH MIC INPUT  
→ 
 GROUP OUT/ST OUT (CH to ST)
58 dB ST CH LINE INPUT  
→ 
 GROUP OUT/ST OUT (ST CH to ST)
47 dB ST CH LINE INPUT  
→ 
 AUX SEND (PRE)
57 dB ST CH LINE INPUT  
→ 
 AUX SEND (POST)
34 dB ST CH INPUT  
→ 
 GROUP OUT/ST OUT (ST CH to ST)
16 dB RETURN  
→ 
 ST OUT
9 dB RETURN  
→ 
 AUX SEND
27.8 dB 2TR INPUT  
→ 
 ST OUT
Monaural/Stereo Input Gain Control 44 dB variable
Monaural/Stereo High Pass Filter 80 Hz 12 dB/octave
Crosstalk (1 kHz)–70 dB between input channels
–70 dB between input/output channels (CH INPUT)
Monaural/Stereo Input Channel Equalization:
Max. Variation 
3
 
±15 dB
HIGH 10 kHz shelving
MID 2.5 kHz peaking
LOW 100 Hz shelving
Monaural/Stereo Input Peak IndicatorOn each channel: red indicator lights if post-EQ signal (on ST channels, if either post-EQ sig-
nal or post-mic-amp signal) comes within 3 dB of the clipping level.
Level MetersTwo 12-point LED meters
Peak point: red indicator
+5, +3, +1, and 0 points: yellow indicators
–1, –3, –5, –7, –10, –15, –20: green indicators
Phantom +48 VDC Power (Balanced input) Supplied when Phantom +48 V switch is ON.
Included Accessory Power adaptor (PA-20)
Power SupplyUSA and Canada: 120 V AC, 60 Hz
Europe: 230 V AC, 50 Hz
Australia: 240 V AC, 50 Hz
Korea: 220 V AC, 60 Hz
Power Consumption MG16/4: 36 W MG12/4: 29 W
Max. Dimensions (W  
×  
H  
×  
D) MG16/4: 423  
×  
108  
×  
416.6 mm MG12/4: 322  
×  
108 
 ×  
416.6 mm
Weight  MG16/4: 5.2 kg MG12/4: 5.0 kg  
MG12-16.fm  Page 27  Thursday, July 3, 2003  4:44 PM 
						

							Appendix
MG16/4, MG12/4
28
Input Specifications
Where 0 dBu = 0.775 V and 0 dBV= 1 V
* Input sensitivity: the lowest level that will produce the nominal output level when the unit is set to maximum gain.
Output Specifications
Where 0 dBu = 0.775 V and 0 dBV= 1 V
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.
For European Model
Purchaser/User Information specified in EN55103-1 and EN55103-2.
Inrush Current: 6A
Conformed Environment: E1, E2, E3 and E4
Input ConnectorGainInput 
ImpedanceAppropriate 
ImpedanceSensitivity*Rated LevelMax. Before 
ClippingConnector 
Specifications
MIC INPUT
(MG16/4: CHs 1 to 8)
(MG12/4: CHs 1 to 4)–60
3 kΩ50–600 Ω mic
–80 dBu 
(0.078 mV)–60 dBu 
(0.775 mV)–40 dBu 
(7.75 mV)
XLR-3-31 type (balanced)
–16–36 dBu 
(12.3 mV)–16 dBu 
(123 mV)+4 dBu 
(1.23 V)
LINE INPUT
(MG16/4: CHs 1 to 8)
(MG12/4: CHs 1 to 4)–34
10 kΩ600 Ω line
–54 dBu 
(1.55 mV)–34 dBu 
(15.5 mV)–14 dBu 
(155 mV)Phone jack (TRS) 
(balanced [T: hot; R: cold; 
S: ground])
+10–10 dBu 
(245 mV)+10 dBu 
(2.45 V)+30 dBu 
(24.5 V)
ST CH MIC INPUT
(MG16/4: CH9(L)/CH10(R),
CH11(L)/CH12(R))
(MG12/4: CH5(L)/CH6(R),
CH7(L)/CH8(R))–60
3 kΩ50–600 Ω mic
–80 dBu
(0.078 mV)–60 dBu 
(0.775 mV)–40 dBu 
(7.75 mV)
XLR-3-31 type (balanced)
–16–36 dBu 
(12.3 mV)–16 dBu 
(123 mV)–10 dBu 
(245 mV)
ST CH LINE INPUT
(MG16/4: CH9(L)/CH10(R),
CH11(L)/CH12(R))
(MG12/4: CH5(L)/CH6(R),
CH7(L)/CH8(R))–34
10 kΩ600 Ω line
–54 dBu 
(1.55 mV)–34 dBu 
(15.5 mV)–14 dBu 
(155 mV)
Phone jack (unbalanced)
+10–10 dBu
(245 mV)+10 dBu
(2.45 V)+30 dBu 
(24.5 V)
ST CH INPUT
(MG16/4: CH13(L)/CH14(R),
CH15(L)/CH16(R))
(MG12/4: CH9(L)/CH10(R),
CH11(L)/CH12(R))
10 kΩ600 Ω line–30 dBu 
(24.5 mV)–10 dBu 
(245 mV)+10 dBu 
(2.45 V)Phone jack (unbalanced);
RCA pin jack
CH INSERT IN 
(MG16/4: CHs 1 to 8)
(MG12/4: CHs 1 to 4)10 kΩ600 Ω line–20 dBu 
(77.5 mV)0 dBu 
(0.775 V)+20 dBu 
(7.75 V)Phone jack (TRS) 
(unbalanced [T: out; R: in; 
S: ground])
RETURN (L, R)10 kΩ600 Ω line–12 dBu 
(195 mV)+4 dBu 
(1.23 V)+24 dBu 
(12.3 V)Phone jack (TRS) (unbalanced 
[T: hot; S: ground])
2TR IN (L, R)10 kΩ600 Ω line–26 dBV 
(50.1 mV)–10 dBV 
(316 mV)+10 dBV 
(3.16 V)RCA pin jack
Output ConnectorsOutput 
ImpedanceAppropriate 
ImpedanceRated LevelMax. Before 
ClippingConnector Specifications 
ST OUT (L, R)150 Ω600 Ω line+4 dBu (1.23 V)+24 dBu (12.3 V)XLR-3-32 type (balanced)
Phone jack (TRS)
(balanced [T: hot; R: cold; S: ground])
GROUP OUT (1-2)
AUX SEND (1-2)150 Ω10 kΩ line+4 dBu (1.23 V)+20 dBu (7.75 V)Phone jack (TRS)
(impedance balanced [T: hot; R: cold; S: 
ground])
CH INSERT OUT
(MG16/4: CHs 1 to 8)
(MG12/4: CHs 1 to 4)150 Ω10 kΩ line0 dBu (0.775 V)+20 dBu (7.75 V)Phone jack (TRS) 
(unbalanced [T: out; R: in; S: ground])
REC OUT (L, R)600 Ω10 kΩ line–10 dBV (316 mV)+10 dBV (3.16 V)RCA pin jack
C-R OUT (L, R)150 Ω10 kΩ line+4 dBu (1.23 V)+20 dBu (7.75 V)Phone jack (TRS) 
(impedance balanced [T: hot; R: cold; S: 
ground])
PHONES 100 Ω40 Ω phone3 mW75 mWStereo phone jack
MG12-16_E.book  Page 28  Monday, May 26, 2003  1:14 PM 
						

							Appendix
MG16/4, MG12/4
29
MG16/4
MG12/4
Dimensional Diagrams
393
31.5
309.6 D 416.6
H 108
101.3 3
W 423
428
27.5
480
When mounted on rack
317.4
D 416.6
325.6
102.62 H 108W 322
480 322
When mounted on rack
MG12-16_E.book  Page 29  Monday, May 26, 2003  1:14 PM 
						

							Appendix
MG16/4, MG12/4
30
Block Diagram and Level Diagram
MG12-16_E.book  Page 30  Monday, May 26, 2003  1:14 PM