Yamaha Audio MX12/4 User Manual
MIXING CONSOLE
Owner's Manual
OFF
PHANTOM +48V
INPUT INPUT INPUT INPUT INPUT INPUT INPUT INPUT
MIC
ON
MIC
MIC
MIC
MIC
MIC
MIC MIC
LINE LINELINE LINE LINE LINE LINE LINE
INS
INS
INS
I ⁄ O
I ⁄ O
12345678
GAIN
GAIN
+10
+10
-34
-16
-16
-60
PEAK
PEAK
HIGH
HIGH
+15
-15
-15
MID
MID
+15
-15
-15
LOW
LOW
+15
-15
-15
MONI 1
MONI 1
10
0
0
EFFECT
EFFECT
10
0
0
2
1
1
3
3
4
PAN
PAN
2413
10
10
5
5
0
0
5
5
10
10
15
15
20
20
30
30
40
40
00
00
1
INS
I ⁄ O
I ⁄ O
INSERT I/O
OUT IN
GAIN
GAIN
GAIN
GAIN
GAIN
+10
+10
+10
-34
-34
-34
-16
-60
PEAK
HIGH
+15
-15
MID
+15
-15
LOW
+15
-15
MONI 1
10
0
EFFECT
10
0
2
1
3
4
PAN
2413
10
5
0
5
10
15
20
30
40
00
2
-16
-16
-60
-60
PEAK
PEAK
HIGH
HIGH
+15
+15
-15
-15
MID
MID
+15
+15
-15
-15
LOW
LOW
+15
+15
-15
-15
MONI 1
MONI 1
10
10
0
0
EFFECT
EFFECT
10
10
0
0
2
2
1
1
3
3
4
4
PAN
PAN
2413
2413
10
10
5
5
0
0
5
5
10
10
15
15
20
20
30
30
40
40
00
00
4
3
+10
+10
-34
-34
-34
-16
-16
-60
-60
-60
PEAK
PEAK
HIGH
HIGH
+15
MID
+15
LOW
+15
MONI 1
10
EFFECT
10
2
4
PAN
2413
10
5
0
5
10
15
20
30
40
00
5
+15
+15
-15
-15
MID
+15
+15
-15
-15
LOW
+15
+15
-15
-15
MONI 1
10
10
0
0
EFFECT
10
10
0
0
2
2
1
1
3
3
4
4
PAN
2413
2413
10
5
0
5
10
15
20
30
40
00
7
6
GAIN
HIGH
MID
LOW
MONI 1
EFFECT
PAN
MONI
1
EFFECT MONI
L
(MONO)
R
+10
PEAK
-15
-15
-15
0
0
1
3
10
5
0
5
10
15
20
30
40
00
11
ST OUTPUT
2
L
R
1
3
C-R OUT
2
4
PHONES
GROUP
OUTPUTINPUT INPUT
-34
LR
TAPE IN
+15
TAPE IN
+15
ST
010
+15
DIGITAL
EFFECT
10
125
10
+12
2
6
0
4
6
-12
2413
10
5
0
5
10
15
20
30
40
00
GROUP 1
12
L
REC OUT
MONI
010
ST
010
L HALL S HALL
VOCAL
500
250
ST GRAPHIC EQUALIZER
10
5
0
5
10
15
20
30
40
00
GROUP 2
R
ST
1k
10
5
0
5
10
15
20
30
40
00
GROUP 3
PHANTOM POWER
RTN
010
010
ON
2k
SEND
MONI 1MONI
010
EFFECT ⁄ MONI 2
010
EFFECT
MONI2
8k4k
10
5
0
5
10
15
20
30
40
00
GROUP 4
+12
6
0
6
-12
MIXING CONSOLE
010
C-R•PHONES
METER
C-R•PHONES
MONI 1
L
PEAK
ST
GROUP
10
5
0
5
10
15
20
30
40
00
ST
TAPE IN
ST
EFFECT
⁄ MONI
EFFECT
/ MONI 2
R
+5
+3
+1
0
-1
-3
-5
-7
-10
-15
-20
4
3
RTN SEND
(MONO)
L
R
L
(MONO)
91011
R
12
GAIN
GAIN
+10
-34
-34
+10
-16
-60
PEAK
PEAK
-15
-15
-15
0
0
1
3
10
5
0
5
10
15
20
30
40
00
HIGH
HIGH
+15
+15
-15
MID
MID
+15
+15
-15
LOW
LOW
+15
+15
-15
MONI 1
MONI 1
10
10
0
EFFECT
EFFECT
10
10
0
2
1
2
3
4
4
BAL
BAL
2413
2413
10
5
0
5
10
15
20
30
40
00
9
8
10
E
Precautions
1. Avoid Excessive Heat, Humidity, Dust and Vibration
Keep the unit away from locations where it is likely to be
exposed to high temperatures or humidity — such as
near radiators, stoves, etc. Also avoid locations which
are subject to excessive dust accumulation or vibration
which could cause mechanical damage.
2. Ventilation
The unit has ventilation slots on the rear and bottom
panels. Do not block these vents.
3. Avoid Physical Shocks
Strong physical shocks to the unit can cause damage.
Handle it with care.
4. Do Not Open the Case or Attempt Repairs or Modifications Y ourself
This product contains no user-serviceable parts. Refer
all maintenance to qualified Yamaha service personnel.
Opening the case and/or tampering with the internal
circuitry voids the warranty.
5. Always power off before making connections
Always turn the power OFF before connecting or disconnecting cables. This is important to prevent damage
to the unit itself as well as other connected equipment.
6. Handle Cables Carefully
Always plug and unplug cables — including the AC
power cord — by gripping the connector, not the cord.
7. Clean With a Soft Dry Cloth
Never use solvents such as benzine or thinner to clean
the unit. Wipe clean with a soft, dry cloth.
8. Always Use the Correct Power Supply
Make sure that the power supply voltage specified on the
rear panel matches your local AC mains supply. Also
make sure that the AC mains supply can deliver more
than enough current to handle all equipment used in
your system.
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 coaxial 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, CA 90620
* This applies only to products distributed by YAMAHA
CORPORATION OF AMERICA.
IMPORTANT NOTICE FOR
THE UNITED KINGDOM
Connecting the Plug and Cord
WARNING: THIS APPARATUS MUST BE EARTHED
IMPORTANT: The wires in this mains lead are coloured in accordance with
the following code:
GREEN-AND-YELLOW : EARTH
BLUE : NEUTRAL
BROWN : LIVE
As the colours of the wires in the mains lead of this apparatus may not
correspond with the coloured markings identifying the terminals in your
plug, proceed as follows:
The wire which is coloured GREEN and YELLOW must be connected to
the terminal in the plug which is marked by the letter E or by the safety earth
symbol or coloured GREEN and YELLOW.
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.
* This applies only to products distributed by YAMAHA KEMBLE
MUSIC (U.K.) LTD.
MX12/4—Owner’s Manual
Thank you for purchasing the Yamaha MX12/4 mixing console. The
MX12/4 is a 12 in/4 group out mixer that provides an ideal balance of
operability, functionality, and simplicity.
In order to take full advantage of the MX12/4's functionality and to enjoy
long and trouble-free use, please read this owner’s manual before use, and
keep it for future reference.
MX12/4
1
Features
• The MX12/4 provides 12 input channels, and
mixes them to stereo or to four group outputs.
• A C-R OUT jack is provided for convenient connection to a sub amp for monitoring. You can
monitor the main stereo output, the TAPE IN
input, and the effect/monitor signals.
• A digital effect unit is built-in, allowing you to create a polished mix without the need for additional
equipment.
• Two SEND jacks are provided: the MONO 1 jack
(pre fader) and the EFFECT/MONO 2 jack (post/
pre fader). These can be used as sends for external
effects or a monitor system.
• Phantom power is provided, so that condenser
microphones requiring an external power supply
can be easily connected.
• INS I/O jacks are provided for input channels 1-4,
allowing individual effects to be inserted into each
channel.
• Input channels 1-8 provide both XLR type mic
inputs and TRS phone line inputs. Channels 9-12
provide stereo line inputs. The MX12/4 accommodates a wide range of sources, from microphones to
line level devices and stereo output synthesizers.
• TAPE IN jacks and REC OUT jacks make it easy to
connect tape decks for playback and recording.
Contents
Front panel.................................................2
Channel control section ..............................2
Master control section.................................4
Connector section....................................... 6
Rear panel..................................................8
Application Example...................................9
Specifications...........................................10
General specifications............................... 10
Input specifications ...................................11
Output specifications................................. 11
Dimensions ............................................... 12
Block and Level diagram........................... 13
MX12/4—Owner’s Manual
Front panel
2
Front panel
Channel control section
Channels 1~8
(monaural)
GAIN
+10
HIGH
-15
MID
-15
LOW
-15
MONI
EFFECT
PAN
10
5
0
5
-16
PEAK
0
0
1
3
-34
-60
+15
+15
+15
10
10
2
4
2413
Channels 9~12
1
2
3
4
5
6
7
(stereo)
GAIN
+10
PEAK
HIGH
-15
MID
-15
LOW
-15
MONI
0
EFFECT
0
1
3
BAL
10
5
0
5
1
GAIN control
Use this knob to adjust the sensitivity according to the input signal level, so that the input level is appropriate.
For the best balance of S/N ratio and dynamic range, adjust this
knob so that the peak indicator 2 lights occasionally.
-34
–60
–16
~ indicates the MIC input adjustment level, and –34~
+10 indicates the LINE input adjustment level.
2
+15
PEAK indicator
This detects the peak level post EQ.
The indicator will light red 3dB before clipping, warning that
+15
+15
clipping level is near.
3
Equalizer
This provides
±
15dB of control over the high, mid and low
ranges at the following center frequencies.
HIGH : 12kHz (shelving)
10
MID : 2.5kHz (peaking)
LOW : 80Hz (shelving)
10
2
4
2413
The frequency response will be flat when the knob is in the “▼”
position.
+20
+15
+10
+5
0
–5
Response [dB]
–10
–15
–20
Frequency [Hz]
10k1k100 20k20
10
15
20
30
40
00
1
MX12/4—Owner’s Manual
8
10
15
20
30
40
00
9
10
4
MONI (monitor) control
This knob controls the level of the signal that is sent from each
channel to the MONI bus.
Since this control is placed before the channel fader, it controls
the level independently from the channel fader setting.
EFFECT control
5
This knob controls the level of the signal that is sent from each
channel to the EFFECT bus.
Since this control is placed after the channel fader, the signal
level will be affected by the channel fader setting.
Channel control section
Group select switches
6
These switches send the signal of each channel to GROUP buses 1~4.
When the / switches are on (pressed in), the signal will be sent to the GROUP buses 1/2.
When the / switches are on (pressed in), the signal will be sent to the GROUP buses 3/4.
1 2
3 4
When both switches are on, the signal will be sent to GROUP buses 1/2 and 3/4.
7
PAN (panpot) control
BAL (balance) control
The PAN knobs (channels 1~8) set the stereo position of the signal that is sent to the GROUP
buses 1/2 or 3/4.
The BAL knobs (channels 9~12) set the balance between the left/right channels, and assign
the signals received at inputs 9 L (MONO) and 11 L (MONO) to the GROUP buses 1/3, and
the signals received at inputs 10 R and 12 R to the GROUP buses 2/4.
If signals are input monaurally to input 9 L (MONO) or 11 L (MONO), the same signal will
be sent to groups 1~4.
8
Channel fader
This controls the output level of the input channel signal, adjusting the volume balance
between channels. The faders of unused channels should be lowered.
3
INPUT
1-4
INPUT
5-8
INPUT
9/10
11/12
MIC
LINE
MIC
LINE
L(MONO)
R
PHANTOM
PHANTOM
MASTER
PAD
PAD
INS
I/O
HA
GAIN
HA
GAIN
HA EQ
GAIN
LOW
LOW
LOW
MID
EQ
EQ
EQHA
MID
MID
HIGH
HIGH
HIGH
PEAK
PEAK
PEAK
PAN
EFFECT
MONI
PAN
EFFECT
MONI
BAL
GROUP
4321
EFFECT
MONI
EFFECT
MONI
MX12/4—Owner’s Manual
4
0
9
4
Front panel
Master control section
5
LR
TAPE IN
TAPE IN
ST
010
DIGITAL
EFFECT
125
+12
6
0
6
-12
10
5
0
5
10
15
20
30
40
00
GROUP 1
MONI
ST
VOCAL
250
ST GRAPHIC EQUALIZER
10
5
0
5
10
15
20
30
40
00
GROUP 2
AB
PHANTOM POWER
R
RTN
010
ST
010
1k
10
5
0
5
10
15
20
30
40
00
GROUP 3
78
MONI 1MONI
010
EFFECT ⁄ MONI 2
010
ON
2k
10
5
0
5
10
15
20
30
40
00
GROUP 4
6
L
REC OUT
010
010
L HALL S HALL
500
SEND
EFFECT
MONI2
C-R•PHONES
METER
C-R•PHONES
MONI 1
8k4k
+12
6
0
6
-12
10
5
0
5
10
15
20
30
40
00
010
TAPE IN
ST
EFFECT
⁄ MONI
EFFECT
/ MONI 2
L
R
PEAK
+5
+3
+1
0
-1
-3
-5
-7
-10
-15
-20
ST
4
3
GROUP
ST
1
ST OUT output select switch
This switch selects the signal which is output via the ST
fader from the ST OUTPUT jacks.
ST position ( )
The ST OUTPUT jacks will output the ST bus signal
(the post-fader signals of groups 1~4, the input signals
from the RTN jacks, the return signal from the internal
digital effect, and the input signal from the TAPE IN
jacks).
GROUP position ( )
3 4
The ST OUTPUT jacks will output the pre-fader signals of groups 3/4.
When this position is selected, the input channel sig-
C
nals will be sent directly to the ST bus without passing
through the group buses 1~4. This setting lets you use
the MX12/4 as a simple 12 in-2 out mixer.
1
2
ST master fader
This fader adjusts the final combined level of all channels, and sends the signal to the ST OUTPUT jacks.
The meters allow you to view the L and R output levels.
3
GROUP 1~4 faders
These faders adjust the signal levels of groups 1~4, and
send their signals to GROUP OUTPUT 1~4 jacks
2
respectively and to the ST bus.
Groups 1 and 3 are sent to ST L, and groups 2 and 4 are
sent to ST R.
Stereo graphic EQ
4
This is a stereo 7-band graphic equalizer that adjust the
3
tonal quality of the signal output to the ST OUTPUT
jacks.
A
±
12dB boost or cut is provided at each of the fre-
quency bands 125, 250, 500, 1k, 2k, 4k, and 8kHz.
5
TAPE IN jacks
These are line level input jacks to which an external DAT recorder or CD player etc. can be
connected for monitoring. The signals which are input here are sent to the ST bus. The input
levels are adjusted by the TAPE IN ST control ( 9 ). Depending on the setting of the C-R•
PHONES select switch ( D ), the signal can also be monitored directly from the C-R OUT jack.
REC OUT jacks
6
These jacks allow an external DAT recorder or cassette recorder to be connected, to record the
same signal as the ST OUTPUT jacks.
The signals that are output from these jacks are not affected by the settings of the ST master
fader or the graphic EQ. Make recording level adjustments on the recording device.
7
PHANTOM indicator
This indicator will light when the PHANTOM switch (rear panel 2 ) is on.
8
POWER indicator
This indicator will light when the MX12/4's power is on.
MX12/4—Owner’s Manual
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