Yamaha Mx124 Instruction Manual

MIXING CONSOLE
Owner’s Manual
Thank you for purchasing the YAMAHA MX12/6 or MX20/6 Mixing Con-
sole. Both the MX12/6 and MX20/6 mixers are designed to provide the user
with an ideal balance of operability, functionality, and simplicity.
In order to get the most out of your MX12/6 or MX20/6 mixer and its
functions, and to enjoy years of trouble-free use, please read this Owner’s
Manual thoroughly and keep it in a safe place for future reference.
Features
• The MX12/6 offers 12 input channels that can be...

MX12/6, 20/6 — Owner’s Manual
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...

MX12/6, 20/6 — Owner’s Manual
Important
Read the following before operating the MX12/6, 20/6
Important1
Warnings
• Do not place a container with liquid or small metal objects on top of this unit. Liquid or metal objects
inside this unit are a fire and electrical shock hazard.
• Do not allow water to enter this unit or allow the unit to become wet. Fire or electrical shock may result.
• Connect this unit’s power cord only to an AC outlet of the type stated in this Owner’s Manual or as
marked on the unit....

MX12/6, 20/6 — Owner’s Manual
2Front & Rear Panels
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o
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iit r r
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The MX12/6’s panel is used for all following
illustrations in this manual.
Channels
1-8 (MX12/6)
1-16 (MX20/6)
(Monaural)Channels
9-12 (MX12/6)
17-20 (MX20/6)
(Stereo)
Response [dB]
+5 +10 +15
–15 –10 –5 0
Frequency [Hz]10k 1k 100 20k 20 +20
–20
Front & Rear Panels
Channel Control Section
qGAIN Control
Adjusts the input level of the signal entering the mixer to an
optimum level.
To obtain an optimum balance between the S/N ratio...

MX12/6, 20/6 — Owner’s Manual
yEFFECT Control
Controls the level of the signal sent from each channel to the EFFECT bus.
This control is located after the channel fader so its level will also be affected by the channel fader
setting.
When a stereo channel is used, L and R channel signals are combined and sent to the EFFECT bus.
uPAN Control (MX12/6:CH1-8, MX20/6:CH1-16)
BAL Control (MX12/6:CH9-12, MX20/6:CH17-20)
The PAN control knobs set the position within the stereo field of each signal that is sent...

MX12/6, 20/6 — Owner’s Manual
4Front & Rear Panels
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!0
er
i
w
!1 !3!4
o
ty
uqST Master Fader
Controls the level of the signal that is sent to the ST
OUT jacks.
wMONO Control
Controls the level of the signal (the monaural signal
that is formed by combining the signals from the
STEREO bus) that is sent to the MONO OUT jack.
eGROUP 1-4 Faders
rTO ST Switch
Controls the level of the GROUP 1-4 signals, and
sends the signals to their respective GROUP
OUTPUT 1-4 jacks.
Also, when the TO ST switch is ON (>),...

MX12/6, 20/6 — Owner’s Manual
Front & Rear Panels5
uDIGITAL EFFECT
• PROGRAM Select Switch
Selects a program from the built-in digital effects.
VOCAL ECHO 1
VOCAL ECHO 2
VOCAL ECHO 3
VOCAL ECHO 4
VOCAL REVERB 1
VOCAL REVERB 2
VOCAL REVERB 3
VOCAL REVERB 4
• PARAMETER Control
Controls parameters (effect level, speed, etc.) of the selected effect program.
• ON Switch
Switches the built-in digital effect ON (>) or OFF (?). When set to OFF, the signal from the built-
in effect is not sent.
• AUX1, AUX2...

MX12/6, 20/6 — Owner’s Manual
6Front & Rear Panels
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qINPUT Jacks (MX12/6:CH1-8, MX20/6:CH1-16)
• MICBalanced XLR type microphone input jacks (1:Ground, 2:Hot, 3:Cold).
These input jacks are compatible with 50-600Ω microphones.
• LINEBalanced TRS phone type line input jacks (T:Hot, R:Cold, S:Ground).
These input jacks are compatible with 600Ω line level devices.
Unbalanced phone plugs can be connected but noise may enter the signal if the cables are
too long or if the location is susceptible to...

MX12/6, 20/6 — Owner’s Manual
Front & Rear Panels7
qINSERT I/O Jack (MX12/6:CH1-4, MX20/6:CH1-8)
These are input/output jacks that are positioned
between the equalizer and fader of the input
channel.
They have a nominal input/impedance of 0dB/
600Ω and a nominal output/impedance of 0dB/
10kΩ.
These jacks can be used to connect devices such
as a graphic equalizer, compressor, noise filter,
etc.
The TRS type phone jack allows bi-directional
connection with the INSERT I/O jack. Connect-
ing a device to...

MX12/6, 20/6 — Owner’s Manual
8Front & Rear Panels
• EFFECT
This is an impedance balanced phone type output jack with a nominal output/impedance of +4dB/
600Ω.
The EFFECT bus signal is sent from this jack. This jack is used to send the signal to an external
effector, etc.
rRETURN L (MONO), R Jacks
These are unbalanced phone type line input jacks with a nominal input/impedance of +4dB/600Ω.
The signal received by these jacks is sent to the STEREO bus, AUX1 and AUX2 buses.
These jacks are normally used to...