TOA M-633D CU Users Manual

OPERATING INSTRUCTIONS
DIGITAL STEREO MIXER M-633D
Thank you for purchasing TOA's Digital Stereo Mixer. Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.
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TABLE OF CONTENTS
1. IMPORTANT SAFETY INSTRUCTIONS ........................................................... 3
3. GENERAL DESCRIPTION .................................................................................... 6
4. FEATURES ................................................................................................................. 6
5. HANDLING PRECAUTIONS ................................................................................. 6
6. NOMENCLATURE AND FUNCTIONS
Front ................................................................................................................................ 7
Rear ................................................................................................................................ 8
7. ASSIGNMENT SETTINGS ..................................................................................... 9
8. USING THE SUMMING OUTPUT KEYS.......................................................... 10
9. SETTING THE ARC FUNCTION
9.1. What is the Automatic Resonance Control (ARC) Function? ................................. 11
9.2. Outline of the ARC Function Settings .................................................................... 11
9.3. Enabling the ARC Function .................................................................................... 13
9.4. Making Fine Acoustic Adjustment .......................................................................... 19
9.5. Disabling the ARC Function ................................................................................... 20
10. SETTING THE FBS FUNCTION
10.1. What is the Feedback Suppressor Function (FBS)? ............................................ 21
10.2. Setting the FBS Function ..................................................................................... 21
11. SETTING THE AUTOMATIC MUTE FUNCTION
11.1. What is the Automatic Mute Function (AUTO MUTE)? ........................................ 22
11.2. Setting the Automatic Mute Function ................................................................... 22
12. AUTOMATIC CLIPGUARD (ACG) FUNCTION ............................................. 23
13. RESETTING TO FACTORY DEFAULT SETTINGS ..................................... 24
14. INSTALLATION
14.1. Mounting in a Rack .............................................................................................. 24
14.2. Mounting on a Desk ............................................................................................. 25
15. CONNECTION
15.1. Connection Example ............................................................................................ 26
15.2. Phantom Power Supply ........................................................................................ 26
15.3. Removable Terminal Plug Connection ................................................................. 27
16. BLOCK DIAGRAM ................................................................................................. 28
17. DIMENSIONAL DIAGRAM .................................................................................. 30
18. SPECIFICATIONS .................................................................................................. 31
Accessories ................................................................................................................... 32
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1. IMPORTANT SAFETY INSTRUCTIONS
• Read these instructions.
• Keep these instructions.
• Heed all warnings.
• Follow all instructions.
• Do not use this apparatus near water.
• Clean only with dry cloth.
• Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
• Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
• Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
• Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
• Only use attachments/accessories specified by the manufacturer.
• Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
• Unplug this apparatus during lightning storms or when unused for long periods of time.
• Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
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When Installing the Unit
• Do not expose the unit to rain or an environment where it may be splashed by water or other liquids, as doing so may result in fire or electric shock.
• Use the unit only with the voltage specified on the unit. Using a voltage higher than that which is specified may result in fire or electric shock.
• Do not cut, kink, otherwise damage nor modify the power supply cord. In addition, avoid using the power cord in close proximity to heaters, and never place heavy objects -- including the unit itself -- on the power cord, as doing so may result in fire or electric shock.
• Avoid installing or mounting the unit in unstable locations, such as on a rickety table or a slanted surface. Doing so may result in the unit falling down and causing personal injury and/or property damage.
• Since the unit is designed for in-door use, do not install it outdoors. If installed outdoors, the aging of parts causes the unit to fall off, resulting in personal injury. Also, when it gets wet with rain, there is a danger of electric shock.
When the Unit is in Use
• Should the following irregularity be found during use, immediately switch off the power, disconnect the power supply plug from the AC outlet and contact your nearest TOA dealer. Make no further attempt to operate the unit in this condition as this may cause fire or electric shock.
· If you detect smoke or a strange smell coming from the unit.
· If water or any metallic object gets into the unit
· If the unit falls, or the unit case breaks
· If the power supply cord is damaged (exposure of the core, disconnection, etc.)
· If it is malfunctioning (no tone sounds.)
• To prevent a fire or electric shock, never open nor remove the unit case as there are high voltage components inside the unit. Refer all servicing to qualified service personnel.
• Do not place cups, bowls, or other containers of liquid or metallic objects on top of the unit. If they accidentally spill into the unit, this may cause a fire or electric shock.
• Do not insert nor drop metallic objects or flammable materials in the ventilation slots of the unit's cover as this may result in fire or electric shock.
• The socket-outlet shall be installed near the equipment and the plug shall be easily accessible.
• The apparatus shall be connected to a main socket outlet with a protective earthing connection.
In Finland:
“Laite on liitettävä suojamaadoituskoskettimilla varustettuun pistorasiaan
In Norway:
“Apparatet må tilkoples jordet stikkontakt
In Sweden:
"Apparaten skall anslutas till jordat uttag"
2. SAFETY PRECAUTIONS
• Before installation or use, be sure to carefully read all the instructions in this section for correct and safe operation.
• Be sure to follow all the precautionary instructions in this section, which contain important warnings and/or cautions regarding safety.
• After reading, keep this manual handy for future reference.
Safety Symbol and Message Conventions
Safety symbols and messages described below are used in this manual to prevent bodily injury and property damage which could result from mishandling. Before operating your product, read this manual first and understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards.
WARNING
Indicates a potentially hazardous situation which, if mishandled, could result in death or serious personal injury.
Indicates a potentially hazardous situation which, if mishandled, could result in moderate or minor personal injury, and/or property damage.
WARNING
CAUTION
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When Installing the Unit
• Never plug in nor remove the power supply plug with wet hands, as doing so may cause electric shock.
• When unplugging the power supply cord, be sure to grasp the power supply plug; never pull on the cord itself. Operating the unit with a damaged power supply cord may cause a fire or electric shock.
• When moving the unit, be sure to remove its power supply cord from the wall outlet. Moving the unit with the power cord connected to the outlet may cause damage to the power cord, resulting in fire or electric shock. When removing the power cord, be sure to hold its plug to pull.
• Do not block the ventilation slots in the unit's cover. Doing so may cause heat to build up inside the unit and result in fire. Also, periodically clean the ventilation slots of dust.
• Avoid installing the unit in humid or dusty locations, in locations exposed to the direct sunlight, near the heaters, or in locations generating sooty smoke or steam as doing otherwise may result in fire or electric shock.
• Be sure to follow the instructions below when rack­mounting the unit. Failure to do so may cause a fire or personal injury.
· Install the equipment rack on a stable, hard floor.
Fix it with anchor bolts or take other arrangements to prevent it from falling down.
· When connecting the unit's power cord to an AC outlet, use the AC outlet with current capacity allowable to the unit.
(Every version except the M-633D CU for US)
· The supplied rack-mounting screws can be used for the TOA equipment rack only. Do not use them for other racks.
(M-633D CU for US)
· Rack-mounting screws are not supplied with the unit. Prepare them that are appropriate for the equipment rack.
· Be sure to complete installation and cable connections before connecting the unit’s power plug to the power source. When uninstalling the unit or disconnecting the unit’s cables, be sure to disconnect the power plug from the power source first. Doing otherwise may result in electrical shock.
When the Unit is in Use
• If dust accumulates on the power supply plug or in the wall AC outlet, a fire may result. Clean it periodically. In addition, insert the plug in the wall outlet securely.
• Switch off the power, and unplug the power supply plug from the AC outlet for safety purposes when cleaning or leaving the unit unused for 10 days or more. Doing otherwise may cause a fire or electric shock.
The lighting flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operation and maintenance (servicing) instruction in the literature accompanying the appliance.
CAUTION
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3. GENERAL DESCRIPTION
The M-633D is a stereo mixer with digital signal processing functions such as Automatic Resonance Control function (ARC), Feedback Suppressor function (FBS), Automatic Clipguard function (ACG), and Automatic Mute function (AUTO MUTE). It can be mounted in an EIA component rack (1U size*).
* 1U size = 44.5 mm (standard size)
4. FEATURES
• A stereo mixer equipped with 12 input channels (6 monaural inputs and 3 stereo inputs), and 6 output channels (2 monaural outputs, 1 stereo output, and 1 stereo recording output).
• Assignable each input signal to 3 output channels individually (MONO OUT 1, MONO OUT 2, and STEREO OUT).
• Sound reproduction owing to automatic clarity control (ARC function).
• Automatic feedback suppressor (FBS function).
• Automatic input sensitivity control when an excessive input signal is applied to the monaural input (ACG function).
• Stereo input muted automatically by detecting the monaural input signal (Automatic Mute function).
• Input sensitivity switchable to either –10 dB or –46 dB for the monaural inputs.
• The monaural inputs capable of supplying phantom power (+24 V, 10 mA).
• Assignment switch cover for protecting the assigned setting positions of each input usable as a signal name writing plate.
• Easy function settings using the front and rear panel controls.
5. HANDLING PRECAUTIONS
• The supplied power supply cord is designed for exclusive use with this unit. Never use it with other equipment.
• Install the unit in locations where the temperature is between 0 and 40 °C (32 and 104 °F) and the moisture is less than 90% (no dew condensation must be formed).
• The M-633D is a precision audio component. To prevent failure, avoid locations where the unit may be exposed to strong shocks or vibrations.
• To clean, be sure to first switch off the unit's power, then wipe with a dry cloth. When the unit gets very dirty, use a cloth damped in a neutral cleanser. Never use benzene, thinner, alcohol, or chemically-treated cleaning cloth because such volatile liquids could deform or discolor the unit.
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6. NOMENCLATURE AND FUNCTIONS
[Front]
1. Power switch
Press this switch to turn on the power. To turn off the power, press this switch again.
2. Power indicator
Lights green when the power is switched on.
3. Assignment switch cover
A cover for protecting the setting positions of the Assignment switches (16) and ARC switch (4). It can be used as a writing plate.
4. ARC switch
Press this switch to enable the Automatic Resonance Control function (ARC). Hold down this switch for 3 seconds to start the ARC measurement. Release the switch when the ARC operation indicator (8) begins to flash. (See p. 13.) Use a fine-tipped screwdriver to press in the switch.
5. Output level indicators
Light green when the output sound level is appropriate. Light red when the output signal reaches 6 dB below clipping level. Light orange when the ARC switch is pressed if the ARC filter has been previously set.
6. Summing output keys
Output the stereo input signals of each channel to the stereo "L" and "R" outputs (17) in stereo mode when not pressed and in monaural mode (summing output) when pressed. (See p. 10.)
7. Stereo input level control knobs
Adjust the stereo input levels.
8. ARC operation indicator
Lights green when the ARC function is operating.
9. Monaural output level control knobs
Adjust the monaural output levels.
10. Stereo output level control knob
Adjusts the stereo output level.
11. Front-mounted stereo input jack
–10 dB*, 10 kΩ, unbalanced type. Connect a stereo mini plug to this jack. It is internally connected in parallel to the STEREO IN 1 (24) on the rear panel. Adjust the input level with the STEREO 1 input level control knob (7). * 0 dB = 1 V
12. Input level indicators
Light green when the output sound level is appropriate. Light red when the internal signal reaches 6 dB below clipping level.
13. FBS keys
Press this switch to enable the Feedback Suppression function (FBS). Holding down the key for 1 second switches between on and off states of the FBS function.
14. FBS operation indicators
Light green when the FBS function is operating.
15. Monaural input level control knobs
Adjust the monaural input levels.
16. Assignment switches
Used to select the output destination to which the post-fader input signals of each input channel are routed. (See p. 9.) Press in an individual switch to set the corresponding output destination as follows. To release, press it in again. 1: MONO 1 output, 2: MONO 2 output, ST: STEREO output. Use a fine-tipped screwdriver to press in the switch.
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16151412 1213
6
4
5
98
10
7
11
2
1
8
[Rear]
17. Stereo output terminals
0 dB*, 1 kΩ, electronically balanced type. Use the supplied removable terminal plug for connection.
18. Auto mute switch
Used to turn on and off the Automatic Mute function (AUTO MUTE).
19. Input sensitivity selector switches
Used to select the input sensitivity and phantom power ON/OFF.
Note
Set to "PHANTOM" only when connecting a microphone which requires phantom power (+24 V, 10 mA) to the corresponding input terminal. Connecting an equipment other than this type of microphone to the input terminal set to PHANTOM may cause the unit to malfunction or may generate hum noise.
20. AC inlet
Connect this inlet to the AC wall outlet using the supplied power cord.
21. Functional ground terminal
Hum noise may be generated when external equipment is connected to the unit. Connecting this terminal to the functional ground terminal of the external equipment may reduce the hum noise.
Note: This ground is not for protective ground.
22. Monaural output terminals
0 dB*, 1 kΩ, electronically balanced type. Use the supplied removable terminal plug for connection.
23. Recording output terminal
–10 dB*, 1 kΩ, unbalanced type. Use an RCA plug for connection.
24. Stereo input terminals
–10 dB*, 10 kΩ, unbalanced type. Use an RCA plug for connection. STEREO IN1 is internally connected in parallel to the front-mounted stereo input jack (11).
25. Monaural input terminals
Input level can be selected by the input level selector switch (19) position as follows.
LINE: –10 dB*/2.4 kΩ MIC: –46 dB*/2.4 kΩ
PHANTOM: –46 dB*/2.4 kΩ Removable terminal blocks and phone jacks are provided. Both terminals are electronically balanced type and internally connected in parallel.
* 0 dB = 1 V
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20 21 22 23 24
18
19
25
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7. ASSIGNMENT SETTINGS
It is possible to assign each input to 3 output channels individually (MONO 1, MONO 2, and STEREO).
Pressing the Assignment switch "1" routes the input signal to the MONO OUT 1 output, switch "2" to the MONO OUT 2 output, and switch "ST" to the STEREO OUT output. Input signals assigned to the same output destination are mixed.
[Assignment setting example]
The figures below show an example of assignment settings of the inputs.
The figure below shows a signal flow.
Mixed signals of the MONO IN 1 and MONO IN 3 are output from the MONO OUT 1, those of the MONO IN 1 and MONO IN 2 from the MONO OUT 2, and the MONO IN 2 signal from the ST OUT L/R.
MONO 1
Input
MONO 1
MONO 2 2, ST
MONO 3 1
Input
MONO IN 1
MONO IN 2
MONO IN 3
Assignment switch
1, 2
Assignment switch
12ST
MONO 2
: Pressed-in state (ON)
Output
ST OUT L/R
MONO 3
MONO OUT 2
MONO OUT 1
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8. USING THE SUMMING OUTPUT KEYS
It is possible to output the stereo input signals applied to the STEREO 1 – 3 to the stereo "L" and "R" outputs either in stereo mode or monaural mode.
[When the summing output key is not pressed in (ST position)]
The "L" channel’s input signal is output to the stereo "L" channel output, and the "R" channel’s input signal to the stereo "R" channel output.
[When the summing output key is pressed in (MONO position)]
Signals applied to each of the input "L" and "R" channels are mixed and output to the stereo "L" and "R" outputs.
Summing output key
L
Input Output
R
L
Input
R
L
R
L
Output
R
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