Toa MX-628 Instruction Manual

INSTRUCTION MANUAL

POWERED MIXER MX-628

Please follow the instructions in this manual to obtain the optimum results from this unit.
We also recommend that you keep this manual handy for future reference.

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TABLE OF CONTENTS

1. SAFETY PRECAUTIONS .............................................................................. 3

2. GENERAL DESCRIPTION ........................................................................... 4

3. FEATURES ........................................................................................................ 4

4. NOMENCLATURE AND FUNCTIONS

Operation Panel

Channel control section .................................................................................... 5

Master output control section ............................................................................ 6

Output level indicator section ............................................................................ 6

Input and Output Panels

Input panel section ............................................................................................ 7

Output panel section ......................................................................................... 8

5. CONNECTION EXAMPLE ............................................................................ 9

6. WIRELESS TUNER INSTALLATION ........................................................ 10

7. CONNECTED EQUIPMENT SELECTION ............................................... 11

8. PROPER SOUND MIXING ........................................................................... 12

9. BLOCK/LEVEL DIAGRAM ........................................................................... 13

10. CHARACTERISTIC DIAGRAM ................................................................... 14

11. DIMENSIONAL DIAGRAM ........................................................................... 14

12. SPECIFICATIONS ........................................................................................... 15

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.

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 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
your nearest TOA dealer.

• 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.

• Do not touch a plug or antenna during thunder and
lightning, as this may result in electric shock.

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.

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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

1. SAFETY PRECAUTIONS

• Be sure to read the instructions in this section carefully before use.

• Make sure to observe the instructions in this manual as the conventions of safety symbols and messages
regarded as very important precautions are included.

• We also recommend you keep this instruction 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.

CAUTION

WARNING

CAUTION

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• 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.

When the Unit is in Use

• Make sure that the volume control is set to
minimum position before power is switched on.
Loud noise produced at high volume when power is
switched on can impair hearing.

• Do not operate the unit for an extended period of
time with the sound distorting. This is an indication
of a malfunction, which in turn can cause heat to
generate and result in a fire.

• 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. A fire or electric shock may result.

CAUTION

2. GENERAL DESCRIPTION

TOA's MX-628 Powered Mixer is small in size, and comes with 8-channel inputs, 1-channel line output L and
R, 1 foldback output and 1 effector output. It also has 2 channels (Speaker output L and R) of built-in power
amplifiers with rated output power of 60 W (4 Ω). Its ideal applications include hotel banquet rooms.

3. FEATURES

• Each of Microphone Input Terminals 1 – 4 has a combination type of receptacle that permits connection of
either the XLR connector or phone plug.

• Input Channels 5 and 6 can be used for wireless microphones when an optional diversity wireless tuner is
installed in the unit.

• Auxiliary stereo Input Channels 7 and 8 are convenient for playback of stereo sound tapes or compact disks.

• Input Channels 1 – 6 are equipped with a trim control that permits even high level input signals to be mixed
without distorting the output of the head amplifier.

• Equipped with line output L and R convenient for power amplifier expansion.

Channel control section

Adjusts a trim, and the output level of panning
potentiometer, sound volume, effector, and foldback
of each channel.

1. Trim Control [TRIM]

Adjusts the amplifier gain depending on the
microphone input level. The gain increases as the
control is rotated clockwise, and decreases as the
control is rotated counterclockwise. The Trim
Control handles the microphone level ranging from
–66 dB to –30 dB. When the microphone input is
distorted, rotate the control counterclockwise till
the distortion is eliminated. The AUX Input is not
equipped with the Trim Control.

2. Foldback Control [FB]

Adjusts the level of a signal to be sent out from
each channel to the Foldback Output.

Note

The foldback output is not influenced by the
Microphone Input and AUX Input Level Control
settings.

3. Effector Output Control [EFF]

Adjusts the level of a signal to be sent out from
each channel to the Effector Output.

Note

The Microphone Effector Output is influenced by
the settings of both the Effector Output Control
and Level Control. It is highly recommended that
the Microphone Effector Output Control be
adjusted after each channel's Level Control has
been set. The AUX Effector Output is not
influenced by the AUX input Level Control setting.

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4. NOMENCLATURE AND FUNCTIONS

[Operation Panel]

Channel control
section

Master output control
section

Output level indicator
section

Wireless tuner receptacle (Channel 5) Wireless tuner receptacle (Channel 6)

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