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REFER SERVICING TO QUALIFIED SERVICE PERSONNEL THE LIGHTNING FLASH WITH ARROWHEAD WITHIN A TRIANGLE IS INTENDED TO TELL THE USER THAT 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. 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 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 ...