Yamaha GA24-12 User Manual
E
MIXING CONSOLE
Owner’s Manual
ii
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 top, 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 yourself
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.
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.
6. Handle cables carefully
Always plug and unplug cables — including the
AC power c or d — b y 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 po wer 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.
Contents
Introduction.......................................1
Features..................................................................1
Front Panel.........................................2
Monaural input channels......................................2
Stereo input channels............................................4
Master Section ...................................6
Variable/Fix select section.....................................6
Mix section............................................................6
ST (Stereo) section................................................9
AUX RETURN section........................................10
MATRIX section..................................................11
C-R MONI (Control room monitor) section
PHONES (headphones) section.........................12
TAPE IN section..................................................13
TALKBACK section............................................14
METER SELECT section.....................................15
Meter bridge........................................................15
Rear Panel ........................................16
GA Diversity Function ......................19
What is GA Diversity?.........................................19
Setting the GA Diversity function......................19
Specifications ...................................20
General specifications.........................................20
Input specifications.............................................21
Output specifications..........................................21
Dimensions..........................................................22
Block and Level diagram.....................................23
GA32/12, GA24/12—Owner’s Manual
Introduction
Thank you for choosing the Yamaha GA32/12 or GA24/12 mixing console. Please read
this manual thoroughly to take best advantage of the console and extend its useful life.
Notes:
This manual has been written on the assumption that you already understand the basic
operation and technical terminology of mixing consoles.
Descriptions of GA24/12 specifications appear in brackets ({}) if they differ from the
GA32/12.
Features
Introduction
1
• The GA32/12 provides 28 monaural and 2 stereo
input modules {the GA24/12 provides 20 monaural and 2 stereo input modules}. The output
channels comprise stereo outputs, 10 mix outputs, and two matrix outputs, and support a wide
range of applications, from SR (sound reinforcement) to facility acoustics.
• Each monaural input channel offers a 26 dB pad,
HPF, phase switch, 4-band EQ (HI-MID and LOMID frequencies are variable), and a 100 mmlong full-stroke fader. Also, phantom power can
be turned on and off for every group of four
inputs.
• Four stereo AUX returns and TAPE IN jacks are
provided as standard.
• The master section of the console is located in the
center area of the unit, facilitating operation.
• The master section provides output channels for
MIX buses 1–10, with EQs and 100 mm-long
faders.
• Each input channel and four stereo AUX returns
include a PFL switch, and stereo bus, MIX buses
1–10, and Matrix 1–2 has an AFL switch,
enabling you to monitor the input/output
sources quickly.
This routing can be used as a conv entional gr oup
bus. In this way, you can configure the bus for a
specific purpose.
• The console has two independent matrixes. You
can mix MIX buses 1–4 and the stereo bus individually at the levels you desire and output them
from the MATRIX OUT 1–2 jacks. This routing
can be used as a mix for the foldback or for individual speakers and amplifiers.
• The INSERT I/O jacks are provided for all monaural input channels, the stereo bus, and MIX
buses 1–4. You can insert an external effect processor, if necessary.
• Talkback signals can be sent to any of MIX buses
1–4, MIX buses 5–10, and the stereo bus.
• C-R monitor output enables you to select PFL/
AFL or TAPE IN as a monitoring source.
• The console’s sturdy finish and rugged design
assure its durability even under severe conditions
and rough on-site usage.
• Using the GA Diversity function enables you to
set MIX buses 1–4 to Variable mode or Fix mode
individually. In Variable mode, you can change
the level of the signals sent out from the input
channels. This routing can be used as a conventional AUX bus. In Fix mode, the level of the signals sent out from the input channels is fixed.
GA32/12, GA24/12—Owner’s Manual
2
Front Panel
Front Panel
1
26dB
5
8
0
C
GAIN
+10 –34
PEAK
HIGH
HI-MID
LO-MID
LOW
M1
M2
M3
M4
M5
M6
M7
M8
M9
M10
PAN
ST
100
100
100
100
100
PRE
100
100
PRE
100
100
PRE
100
PFL
2
–60–16
3
4
80
+15–15
8k400
+15–15
6
1.6k80
+15–15
+15–15
7
EQ
ON
ON
9
ON
ON
A
B
RL
D
ON
E
10
5
0
5
F
10
20
30
40
50
60
Monaural input channels
The GA32/12 {GA24/12} has 28 {20} monaural input channels. They are located on both
sides of the master section and feature the same specifications.
Pad switch
A
This switch is used to attenuate input signals by 26 dB. Press down the switch to turn the
pad on.
GAIN control
B
This control knob is used to adjust input sensitivity. The adjustable range is –16 dB to
–60 dB when the pad switch
turned on.
C
Ø (Phase) switch
This switch reverses the phase of input signals. Press down this switch to reverse the phase.
D
High pass filter switch
This high pass filter is used to cut the frequency range below 80 Hz with a slope of 12 dB/
oct. Press down the switch to turn the high pass filter on.
E
PEAK indicator
This indicator lights up when the level of signals that pass the EQ reaches 3 dB below the
clipping level.
EQ controls (HIGH/HI-MID/LO-MID/LOW)
F
This 4-band equalizer provides ± 15 dB of cut and boost over each range, with the center
frequencies and types shown in the following table. The frequencies for HI-MID and LOMID are variable.
G
EQ switch
This switch is used to turn equalization on and off. Press down the switch to turn
equalization on.
H
M1–M4 mix level controls
These controls are used to route the post fader signals from the input channel to MIX
buses 1–4.
Note: When you press down the M1–M4 switches to the FIX position in the Variable/
Fix select section (see page 6), the output level of the signals routed to the MIX buses will
be fixed and the corresponding M1–M4 mix level controls will be disabled.
1
is turned off, and +10 dB to –34 dB when the pad switch is
Band Center frequencies Type
HIGH 10 kHz shelving
HI-MID 400 Hz–8 kHz peaking (parametric)
LO-MID 80 Hz–1.6 kHz peaking (parametric)
LOW 100 Hz shelving
GA32/12, GA24/12—Owner’s Manual
Monaural input channels
ON switches
I
These switches are used to turn on and off the signals routed from the input channel to MIX
buses 1–4.
Note: When these switches are set to off, no signals will be sent from the input channel to
the corresponding MIX buses regardless of the setting of the switches in the Variable/Fix
select section (see page 6).
J
M5–M10 mix level controls
These controls route the input channel signals to MIX buses 5–10. Use the PRE switches
select pre- or post-fader.
PRE switches
K
These switches are used to select pre- or post-fader for signals sent from the input channel to
MIX buses 5–10. Each switch is effective for one pair of MIX buses: 5/6, 7/8, or 9/10. When y ou
turn these switches on, the pre-fader signals will be sent to the corresponding MIX bus pair.
PAN control
L
This control is used to set the stereo image of signals sent from the input channel to the ST
(stereo) buses.
K
3
to
INPUT A
1-12,
17-24/17-32
INPUT B
M
ST (Stereo) switch
When you turn this switch on, input channel signals are sent to the ST buses.
N
ON switch
This switch is used to turn on and off the corresponding input channel module. When this
switch is turned off, no signals are sent from the corresponding input c hannel t o the ST buses
and MIX buses 1–10. Ho wever, using the PFL switc h
O
will enable you to monitor the signals
via the C-R MONITOR OUT jacks or PHONES jack.
O
PFL (Pre-fader Listen) switch
When you turn this switch on, the pre-fader signals of the input channel are routed to the PFL
bus, and you are able to monitor the signals via the C-R MONITOR OUT jacks or PHONES
jack.
P
Channel fader
This fader is used to adjust the level of the input channel signals. This fader setting affects the
level of the signals routed to the ST buses, MIX buses 1–4, and MIX buses 5–8 (when the PRE
switches are turned off).
PHANTOM
PAD
26dB
+48V
HA
GAIN
HPF
INSERT I/O
MIX
PEAK
ON
ON
ON
ON
PRE
PRE
PRE
ST
80
ø
4-Stage EQ
fgf
HIGH
HI-MID
g
LOW
LO-MID
EQ
ON
(FIX)
M1
M2
M3
M4
M5
M6
M7
M8
M9
M10
PAN
4321
1234
MIX
(VARIABLE)
1098765
PFL
ST
RL
CTLRL
PFL
Signal flow of the monaural input channel
GA32/12, GA24/12—Owner’s Manual
4
2
Front Panel
GAIN
–34+10
PEAK
80
HIGH
+15–15
HI-MID
+15–15
LO-MID
+15–15
LOW
+15–15
Stereo input channels
The GA32/12 and GA24/12 provide two stereo input channel modules. Use the paired
1
3
4
INPUT 13/14 and 15/16 jacks (see page 17, rear panel
connect signals only to the 13L (MONO) jack or 15L (MONO) jack, the same signal will
be sent t the o M1–4 and ST buses.
GAIN control
A
This control is used to adjust input sensitivity. The adjustable range is +10 dB to –34 dB.
B
PEAK indicator
This indicator lights up when the level of signals that have been processed by the EQ
reaches 3 dB below the clipping level.
High pass filter switch
C
This high pass filter is used to cut the frequency range below 80 Hz with a slope of 12 dB/
oct.
) to input stereo signals. If you
5
6
8
A
M1
M2
M3
M4
M5
M6
M7
M8
M9
M10
BAL
5
EQ
EQ controls (HIGH/HI-MID/LO-MID/LOW)
D
This 4-band equalizer provides ± 15 dB of cut and boost over each range, with the center
100
ON
100
ON
7
100
ON
100
ON
100
PRE
100
100
9
PRE
100
100
PRE
100
0
RL
ST
B
ON
frequencies and types shown in the following table.
Band Center frequencies Type
HIGH 10 kHz shelving
HI-MID 3 kHz peaking
LO-MID 800 Hz peaking
LOW 100 Hz shelving
E
EQ switch
This switch is used to turn the equalization on and off.
F
M1–M4 mix level controls
These controls are used to route the post fader signals from the stereo input channel to
MIX buses 1–4. When stereo signals are input, the L channel signal will be sent to MIX
buses 1, 3, and the R channel signal will be sent to MIX buses 2 and 4.
Note: When you press down the M1–M4 switches to the FIX position in the Variable/
Fix select section (see page 6), the output level of signals sent to the MIX buses will be
fixed and the corresponding M1–M4 mix level controls will be disabled.
ON switches (M1–M4)
G
These switches are used to turn on and off the signals routed from the stereo input channel
to MIX buses 1–4.
PFL
C
10
5
0
5
D
10
20
30
40
50
60
GA32/12, GA24/12—Owner’s Manual
Note: When these switches are set to off, no signals are sent from the stereo input
channel to the corresponding MIX buses regardless of the setting of the switches in the
Variable/Fix select section (see page 6).
H
M5–M10 mix level controls
These control knobs route the ster eo input channel signals to MIX buses 5–10. Stereo
input signals are mixed into a monaural signal and sent to MIX buses 5–10. Use the PRE
switches
9
to select pre- or post-fader.
Stereo input channels 5
I PRE (Pre-fader) switches
These switches are used to select pre- or post-fader for signals sent from the stereo input
channel to MIX buses 5–10. Each switch is effecti v e for one pair of MIX buses:5/6, 7/8, or 9/10.
When you turn these switches on, the pre-fader signals are sent to the corresponding MIX bus
pair.
J BAL (Balance) control
This control is used to adjust the left and right balance of signals sent from the stereo input
channel to the ST bus.
K ST (Stereo) switch
When you turn this switch on, the ster eo input channel signals will be sent to the ST bus. If you
connect monaural signals to the 13L (MONO) jack or 15L (MONO) jack (see page 17, rear
panel
5), the same signals will be sent to both L and R channels.
L ON switch
This switch is used to turn on and off the corresponding stereo input channel. When this switch
is turned off, no signals are sent to the ST bus and MIX buses 1–10. However, using the PFL
switch
PHONEs jack.
M will enable you to monitor the signals via the C-R MONITOR OUT jacks or
13L(MONO),
15L(MONO)
14/13,
16/15
M PFL (Pre-fader listen) switch
When you turn this switch on, the pre-fader signals of the stereo input channel are rout ed to
the PFL bus, and you can monitor the signals via the C-R MONITOR OUT jacks or P HONES
jack.
N Channel fader
This fader is used to adjust the level of the stereo input channel signals. This fader setting affects
the level of the signals routed to the ST bus, MIX buses 1–4, and MIX buses 5–8 (when the PRE
switches are turned off).
HA
14R,
16R
PAD
PAD
HPF
GAIN
HA
80
HPF
4-Stage EQ
HIGH
HI-MID
4-Stage EQ
LOW
LO-MID
MIX
PRE
PRE
PRE
(FIX)
M1
M2
M3
M4
M5
M6
M7
M8
M9
M10
BAL
PFL
ON
EQ
PEAK
ON
ON
ON
ON
ST
MIX
(VARIABLE)
ST
PFL
109876512344321
RL
CTL
RL
PFL
Signal flow of the stereo input channel
GA32/12, GA24/12—Owner’s Manual
6 Master Section
Master Section
Variable/Fix select section
The GA32/12 and GA24/12 feature a GA (Group/A ux) di versity function, which enables y ou t o
use the MIX bus 1–4 signals as group bus signals or A UX bus signals. This section of the console
allows you to select whether you wish to use MIX buses 1–4 as group buses or AUX buses.
A M1–M4 switches
These switches are used to select whether the level of signals sent from the input channels to
MIX buses 1–4 will be fixed (FIX) or variable (VARIABLE).
■ When FIX is on:
The selected MIX bus(es) function as a group bus. The
level of the signal from each input channel will be fixed,
VARIABLE / FIX
FIX
and the M1–M4 mix level controls of the input channels
that correspond to the MIX buses will be disabled.
FIX
1
■ When FIX is off:
The selected MIX bus(es) function as an AUX bus. Signals
that pass through the M1–M4 mix level controls of each
input channel (see page 2, monaural input channel
page 4, stereo input channel
6) are sent to the
corresponding MIX buses.
8, and
FIX
FIX
Mix section
This section consists of the output channels that handle MIX bus 1–10 signals individually.
Signals that pass these output channels are output from MIX OUT 1–10 jacks (see page 17, rear
panel
6), and also routed t o the AFL bus. MIX bus 1–4 signals are also routed to the ST bus
and Matrixes 1/2.
1
HIGH
MID
HIGH
+15–15
MID
6k300
HIGH
+15–15
MID
6k300
HIGH
+15–15
MID
6k300
HIGH
+15–15
MID
6k300
HIGH
+15–15
MID
6k300
HIGH
+15–15
MID
6k300
HIGH
+15–15
MID
6k300
HIGH
+15–15
MID
6k300
HIGH
+15–15
6k300
+15–15
MID
M1
M2
M3
M4
1
6k300
LOW
2
PAN
3
4
TO ST
5
6
GA32/12, GA24/12—Owner’s Manual
+15–15
+15–15
EQ EQ EQ EQEQ
RL
AFL
10
5
0
5
10
20
30
40
50
60
M1 M2
LOW
PAN
TO ST
+15–15
+15–15
RL
AFL
10
5
0
5
10
20
30
40
50
60
+15–15
LOW
+15–15
PAN
RL
TO ST
AFL
10
5
0
5
10
20
30
40
50
60
M3 M4
LOW
PAN
TO ST
+15–15
+15–15
RL
AFL
LOW
+15–15
+15–15
AFL
LOW
+15–15
+15–15
EQ
AFL
LOW
+15–15
+15–15
EQ
AFL
LOW
+15–15
+15–15
EQ
AFL
LOW
+15–15
+15–15
EQ
AFL
LOW
+15–15
+15–15
2
EQ
AFL
5
10
5
0
5
10
20
30
40
50
60
10
5
0
5
10
20
30
40
50
60
M5
M6
10
5
0
5
10
20
30
40
50
60
M7
10
5
0
5
10
20
30
40
50
60
M8
10
5
0
5
10
20
30
40
50
60
M9
10
5
0
5
10
20
30
40
50
60
10
5
0
5
6
10
20
30
40
50
60
M10
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