TOA Electronics M-1264, M-1212E User Manual

OPERATING INSTRUCTIONS

M-1264

STEREO MIXERS

TOA 1000 series

M-1212E

THE LIGHTNING FLASH WITH

ARROWHEAD WITHIN A TRIANGLE IS

INTENDED TO TELL THE USER THAT

CAUTION

TO REDUCE THE RISK OF ELECTRICAL

SHOCK, DO NOT REMOVE COVER.

NO USER SERVICEABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIED

SERVICE PERSONNEL

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.

PARTS INSIDE THE PRODUCT ARE A

RISK OF ELECTRIC SHOCK TO

PERSONS.

THE EXCLAMATION POINT WITHIN A

TRIANGLE IS INTENDED TO TELL THE

USER THAT IMPORTANT OPERATING

AND SERVICING INSTRUCTIONS ARE

IN THE PAPERS WITH THE

APPLIANCE.

TOA Corporation

CONTENTS

Handling Precautions

General Description

Features

Nomenclature (Front Panel)

Nomenclature (Rear Panel)

Input Transformer Mounting

Phantom Power Supply

Input and Output Specifications

Block Diagrams and Level Diagrams

Specifications

Accessories

Appearance

HANDLING PRECAUTIONS

Operating voltage is 120V AC ± 10% (120 V version) or 220-240V AC ± 10% (220-240 V version).

Avoid using the power voltage exceeding these ranges.

Do not expose the unit to corrosive chemicals or salt water. Also, keep your beverages away from the unit

because they may be spilt.

When there is a failure, refer the unit to qualified service personnel.

Observe the following polarity of the XLR connector:

Pin #1: Ground, Pin #2: Cold, Pin #3: Hot

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.

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.

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.)