TOA Electronics DJ Equipment M 1264 M 1212E User Manual

OPERATING INSTRUCTIONS  
M-1264  
M-1212E  
STEREO MIXERS  
TOA 1000 series  
THE  
LIGHTNING  
FLASH  
WITH  
ARROWHEAD WITHIN A TRIANGLE IS  
INTENDED TO TELL THE USER THAT  
PARTS INSIDE THE PRODUCT ARE A  
CAUTION  
RISK  
OF  
ELECTRIC  
SHOCK  
TO  
TO REDUCE THE RISK OF ELECTRICAL  
SHOCK, DO NOT REMOVE COVER.  
NO USER SERVICEABLE PARTS INSIDE.  
PERSONS.  
THE EXCLAMATION POINT WITHIN A  
TRIANGLE IS INTENDED TO TELL THE  
USER THAT IMPORTANT OPERATING  
AND SERVICING INSTRUCTIONS ARE  
REFER  
SERVICING  
TO  
QUALIFIED  
SERVICE PERSONNEL  
IN  
THE  
PAPERS  
WITH  
THE  
APPLIANCE.  
Please follow the instructions in this manual to obtain the optimum results from this unit.  
We also recommend you to keep this manual handy for future reference.  
TOA Corporation  
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GENERAL DESCRIPTION  
The TOA M-1264 is a 19" rack-mountable stereo mixer with multiple inputs and outputs. Inputs can be expanded by  
using the M-1212E expansion unit.  
FEATURES  
Six monaural inputs (expandable using the M-1212E), four stereo inputs and one auxiliary stereo input.  
One each of output: stereo, group (L/R), stereo sum, monitor (L/R), AUX, and headphone.  
A compressor built in each monaural input minimizes signal distortion caused when there is an extremely large  
input. The activation of the compressor can be indicated by a compressor activation lamp.  
Motorized stereo/group output volume controls can be remotely adjusted from a control device. The adjusted  
control position is indicated on the control device.  
The M-1212E can function as a sub-mixer because it has mixing outputs (stereo L/R, group L/R, AUX, and cue).  
Phantom power (+24V DC) can be supplied to each monaural input.  
A channel switch with an "easy-to-see" indicator provided for each input improves the signal-to-noise ratio and  
simplifies operations.  
4-step stereo/group send selection switch (stereo to group/group to stereo bus/group to post-stereo output  
control/ OFF).  
A 3-step input level selection switch (LINE/MIC/MIC (HPF)) allows selection of either a line or microphone  
level input for each monaural input. The MIC (HPF) position cuts undesired frequencies using a highpass filter.  
Electronically-balanced monaural input can be changed to a transformer-balanced input using an optional input  
transformer.  
Security cover.  
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NOMENCLATURE [Front Panel]  
[M-1264] (Main unit)  
[M-1212E] (Expansion unit)  
L/C/R assign switch [L/C/R]  
Bus assign switch [ASSIGN]  
Aux assign switch [AUX]  
Cue switch [CUE]  
Input level control  
Channel switch/indicator  
Stereo output level control [STEREO]  
Adjusts the level to send out a mixed input signal from the stereo bus to the stereo output. This control can be  
remotely operated.  
Group output level control [GROUP]  
Adjusts the level to send out a mixed input signal from the group bus to the group output. This control can be  
remotely operated.  
Sum output level control [SUM]  
Adjusts the stereo sum output signal level.  
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Aux output level control [AUX]  
Adjusts the level of signals going to the AUX output.  
Monitor output level control [MONITOR]  
Adjusts the level to transmit a signal from the stereo bus or cue bus to the monitor output and headphone output.  
Cue indicator [CUE]  
Lights when any cue switch is pressed, indicating that the cue bus signal is being sent to both the monitor and  
headphone outputs. If the indicator is off, the stereo bus signals are sent to both outputs.  
Headphone jack [PHONES]  
Outputs the signal adjusted with the monitor output level control. Connect a headphone with 8 ohms or higher  
impedance.  
Power indicator [POWER]  
Power switch  
Turns on the power when this switch is pressed (the power indicator lights). To turn off the power, press this  
switch again (the indicator is extinguished).  
L/C/R assign switches [L/C/R]  
Assign each monaural input signal to L, R, or both L and R lines of the group or stereo bus selected with the bus  
assign switch _ .  
Bus assign switches [ASSIGN (ST/GR)]  
Assign the monaural input signal adjusted with the input level control  
to the stereo or group bus. (ON: group /  
OFF: stereo)  
Aux assign switches [AUX]  
Send the input signal to the AUX bus.  
Cue switches [CUE]  
Send the input signal to the cue bus regardless of the position of the channel switch , allowing monitoring of the  
signal at the headphone or monitor output.  
Input level controls  
Adjust each input signal level.  
Channel switches/indicators  
Send the input signal to the bus selected with both the L/C/R assign switch _ and bus assign switch © or with  
the AUX assign switch  
. At the same time, the corresponding channel indicator lights green for monaural input  
or yellow for stereo input. If the monaural channel indicator lights red, this indicates that the corresponding  
compressor is activated. In such cases, adjust the input level using the input level control, as required. (The  
compressor is activated when the signal level exceeds +17 dB.)  
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NOMENCLATURE [Rear Panel]  
[M-1264] (Main unit)  
[M-1212E] (Expansion unit)  
Input level selection switches [LINE/MIC/MIC (HPF) ]  
Set each monaural input level for Line, Mic or Mic with highpass filter.  
Monaural input XLR connectors [MONO INPUT 1~6 (M-1264) /1~12 (M-1212E) ]  
This electronically-balanced input can be changed to the transformer-balanced type using an optional input  
transformer. (Refer to the section "Input Transformer Mounting" on page 8.) Phantom power (+24V DC) can also  
be supplied to each input.  
Stereo input RCA jacks [STEREO INPUT 1~4 L/MONO, R]  
Unbalanced stereo input.  
Auxiliary stereo input phone jacks [ST BUSS IN L/MONO, R]  
Unbalanced stereo input to send signals to the stereo bus.  
Bus-link input terminal [BUSS LINK IN]  
Connects to the M-1212E's bus-link output for monaural input expansion. (For connection, use the cable supplied  
with the M-1212E.)  
Sum output XLR connector [SUM OUT]  
Electronically-balanced stereo sum output.  
AUX output phone jack [AUX OUT]  
Unbalanced AUX output.  
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Monitor output phone jacks [MONITOR OUT L, R]  
Unbalanced monitor output.  
Stereo output XLR connectors [STEREO OUT L, R]  
Electronically-balanced stereo output.  
Stereo/group send selection switch  
Four-step selection switch.  
• STEREO TO GROUP position: Sends the stereo bus signal to the group bus.  
• OFF  
• GROUP TO STEREO(PRE) position: Sends the group output signal to the stereo bus.  
• GROUP TO STEREO(POST) position: Sends the group output signal mixed with the stereo signal adjusted  
with the stereo output level control to the stereo output.  
Group output phone jacks [GROUP OUT L, R]  
Unbalanced group output.  
Remote terminals [REMOTE]  
Used for remotely operating the stereo output level control and group output level control. There are four  
following terminals:  
UP : While this terminal and COM terminal are shorted, the level control rotates clockwise.  
DOWN : While this terminal and COM terminal are shorted, the level control rotates counter-clockwise.  
COM : Common terminal  
POSI : The voltage of 0 to +5V DC is output between this terminal and COM terminal depending on the knob  
setting (0-10).  
Note : Do not leave the UP and DOWN terminals shorted for longer than necessary.  
Fuse and fuse holder  
When replacing, be sure to use the specified type and ratings of fuse to avoid the risk of fire. (1.5 A/250 V for  
120V AC version, and T315 mA/250 V for 220-240V AC version)  
AC power cord  
Ground loop break switch  
This switch, when set to "LIFT" position, breaks a hum-generating ground loop formed when the unit is connected  
to external components. Normally, set this switch to "NORM" position.  
Bus-link output terminal [BUSS LINK OUT]  
Connects to the M-1264's bus-link input terminal.  
Bus-link input terminal [BUSS LINK IN]  
Connects to other M-1212E's bus-link output terminal for monaural channel expansion. (For connection, use the  
cable supplied with the M-1212E.)  
Stereo mixing output phone jacks [STEREO MIX OUT L, R]  
Unbalanced stereo bus mixing output.  
Group mixing output phone jacks [GROUP MIX OUT L, R]  
Unbalanced group bus mixing output.  
AUX mixing output phone jack [AUX MIX OUT]  
Unbalanced AUX bus mixing output.  
Cue mixing output phone jack [CUE MIX OUT]  
Unbalanced cue bus mixing output.  
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INPUT TRANSFORMER MOUNTING  
CAUTION  
THESE SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY. TO AVOID ELECTRIC  
SHOCK, DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THE OPERATING  
INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO. REFER ALL SERVICING TO QUALIFIED SERVICE  
PERSONNEL  
The M-1264's (M-1212E's) monaural inputs are electronically balanced.  
They can be made transformer-balanced inputs using the optional input transformer LT-101 or LT-102.  
How to mount the input transformer  
Set the power switch to OFF and remove the power cord from a wall outlet.  
Remove the unit's case by loosening six side panel screws (three each on both sides) and two rear panel  
screws.  
Fix two sleeves to the bottom chassis using screws, then mount the transformer to the sleeves using other  
screws. (The sleeves and screws are supplied with the transformer.) When stacking two transformers due to the  
number or arrangement of channels, use the sleeves supplied with the M-1264 (M-1212E).  
When changing the inputs 1, 3, 5, etc. located in the upper section, detach connector  
from CN-104 connector,  
connect the detached connector to the transformer connector  
CN-104. When changing the inputs 2, 4, 6, etc. in the lower section, detach connector  
connect the detached connector to the transformer connector  
CN-105.  
, and connect the transformer lead to the  
from CN-105 connector,  
, and connect the transformer lead  
to the  
Replace the case.  
MONO INPUT  
CH-1 (CH-2)  
[Note] *1: For the upper inputs.  
*2: For the lower inputs.  
Sleeves supplied with  
the M-1264 (M-1212E)  
Bottom chassis  
Sleeves supplied  
with the optional  
transformer  
Side view  
Top view  
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Matching TransformerSpecifications  
Model  
LT-102  
600 :600  
LT-101  
Impedance  
10k :10k  
Frequency response  
Constant loss  
Distortion  
Within 0.15 dB (30 Hz~20 kHz)  
Within 1.5 dB (1 kHz)  
Within 0.15 dB (30 Hz~20 kHz)  
Within 1.5 dB (1 kHz)  
0.2 % or less (50 Hz / +5 dB*)  
0.2 % or less (50 Hz / +5 dB*)  
* 0 dB = 0.775 Vrms  
** Specifications are subject to change without notice.  
PHANTOM POWER SUPPLY  
CAUTION  
THESE SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY. TO AVOID ELECTRIC  
SHOCK, DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THE OPERATING  
INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO. REFER ALL SERVICING TO QUALIFIED SERVICE  
PERSONNEL.  
Phantom power (+24V DC) can be supplied to each monaural input using the internal phantom power switch.  
Set the power switch to OFF, and remove the power cord from a wall outlet.  
Remove the unit's case by loosening six side panel screws (three each on both sides) and two rear panel screws.  
Set the phantom power switch of the desired input to ON.  
Replace the case.  
[Precautions]:  
To avoid electric shocks, do not touch the unit's internal components except when installing the input transformer  
and setting the phantom power switch.  
Leave the phantom power switch in the OFF position for inputs not receiving the phantom power. (The unit is  
factory-preset as shown in the figure below.)  
Upper switch  
Lower switch  
Upper inputs (CH-1, 3, 5, ..)  
Lower inputs (CH-2, 4, 6, ..)  
M-1264 (M-1212E) rear panel  
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INPUT AND OUTOUT SPECIFICATIONS  
Connector  
Level  
Impedance  
Input/Output  
Line  
50 k  
1 k  
-10 dB  
-60 dB  
-60 dB  
-10 dB  
+4 dB  
XLR 3-pin connector  
Monaural Input Mic  
Mic (with HPF)  
1 k  
Stereo Input (L, R)  
50 k  
10 k  
RCA jack  
Auxiliary Stereo Input (L, R)  
Unbalanced phone jack  
or more  
(Matched load)  
600  
Stereo Output (L, R)  
Sum Output  
+4 dB  
+4 dB  
XLR 3-pin connector  
or more  
600  
(Matched load)  
Group Output (L, R)  
Monitor Output (L, R)  
AUX Output  
+4 dB  
+4 dB  
+4 dB  
+4 dB  
+4 dB  
+4 dB  
+4 dB  
1 k  
1 k  
1 k  
1 k  
1 k  
1 k  
1 k  
Unbalanced phone jack  
Stereo Mixing  
Group Mixing  
AUX Mixing  
Cue Mixing  
Mixing Output  
(M-1212E)  
Unbalanced phone jack  
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