Toa DA-250FH CE-AU User Manual
MULTICHANNEL POWER AMPLIFIERS
DA-250F CE301
DA-250F CE-GB
DA-250F CE-AU
DA-250F
DA-250FH
Thank you for purchasing TOA's Multichannel Power Amplifier.
Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.
OPERATING INSTRUCTIONS
An all-pole mains switch with a contact separation of at least 3 mm in each pole shall be
incorporated in the electrical installation of the building.
DA-250FH CE301
DA-250FH CE-GB
DA-250FH CE-AU
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TABLE OF CONTENTS
1. SAFETY PRECAUTIONS ............................................................................... 3
2. GENERAL DESCRIPTION ............................................................................. 5
3. FEATURES .......................................................................................................... 5
4. HANDLING PRECAUTIONS .......................................................................... 5
5. INSTALLATION PRECAUTIONS ................................................................. 6
6. NOMENCLATURE AND FUNCTIONS
Front ......................................................................................................................... 7
Rear .......................................................................................................................... 8
7. SETTINGS AND CONNECTIONS
7.1. Switch Settings and Speaker Connections
7.1.1. When using the DA-250F ........................................................................ 9
7.1.2. When using the DA-250FH .................................................................... 11
8. REMOVABLE TERMINAL PLUG CONNECTION .................................. 12
9. PROTECTION OPERATION LIST ............................................................... 13
10. TAMPER-PROOF CAP ATTACHMENT .................................................... 13
11. CLEANING THE FILTER ................................................................................ 14
12. DIMENSIONAL DIAGRAM ............................................................................ 15
13. BLOCK DIAGRAMS
13.1. DA-250F ........................................................................................................... 16
13.2. DA-250FH ........................................................................................................ 17
14. SPECIFICATIONS
14.1. DA-250F CE301, DA-250F CE-GB, DA-250F CE-AU ..................................... 18
14.2. DA-250FH CE301, DA-250FH CE-GB, DA-250FH CE-AU ............................. 19
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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.
• Be sure to replace the unit's terminal cover after
connection completion. Because the voltage of up
to 100 V is applied to the high impedance speaker
terminals, never touch these terminals to avoid
electric shock. (DA-250FH only)
• External wiring connected to the terminals marked
with requires installation by an instructed person.
(DA-250FH only)
• The apparatus shall be connected to a mains
socket outlet with a protective earthing connection.
When the Unit is in Use
• Should the following irregularity be found during
use, immediately turn off this unit's power switch,
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 such
as modification inside the unit 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.
• Do not touch a plug 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.
1. 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
CAUTION
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• 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.
• 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.
• To avoid electric shocks, be sure to first turn off this
unit's power switch when connecting speakers.
• The unit is designed exclusively to be mounted in
an equipment rack. Be sure to follow the
instructions below when rack-mounting 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.
· The supplied rack-mounting screws can be used
for the TOA equipment rack only. Do not use
them for other racks.
· When installing the unit in a rack other than that
of TOA, be sure to use the screws with a
diameter of over 5 mm and length of over 12 mm
to mount the unit.
· When connecting the unit's power cord to an AC
outlet, use the AC outlet with current capacity
allowable to the unit.
When the Unit is in Use
• Make sure to set all input level controls to ∞(infinity)
position before power is switched on.
Loud noise produced when power is switched on
with any of those controls set to the position other
than ∞position can impair hearing.
• Do not operate the unit for an extended period of
time with the sound distorting. Doing so may cause
the connected speakers to heat, resulting in a fire.
• Contact your TOA dealer as to the cleaning. If dust
is allowed to accumulate in the unit over a long
period of time, a fire or damage to the unit may
result.
• 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.
• Turn off this unit's power switch, 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.
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2. GENERAL DESCRIPTION
TOA's DA-250F and DA-250FH Multichannel Power Amplifiers feature high power handling capabilities and
durability. The DA-250F is configured with 250 W x 4 channels (4 Ω output) and 170 W x 4 channels (8 Ω
output), and the DA-250FH features a 250 W x 4 channels (100 V line, 40 Ω output) configuration. Besides,
the DA-250F's output is made available for bridge connection, allowing it to be used as a 500 W (8 Ω) x 2
channels stereo amplifier or as a 3-channel amplifier comprised of 500 W (8 Ω) + 250 W (4 Ω) x 2 channels.
Their wide range of applications include stores and permanent sound systems.
3. FEATURES
• 1U rack mounting size*.
• Low power consumption and light weight.
• An input signal to Channel 1 can be routed to all channels, and the output level adjusted using the input level
control for each channel.
• Electronically-balanced inputs.
• Input terminals employ removable terminal blocks to provide maximum connection ease.
• Equipped with the LED indicators that show the input/output status, etc.
• Built-in protection circuitry disconnects the power amplifier's output from the load when a short circuit,
overload, or unusual temperature rise occurs.
* 1U size = 44.5 mm (reference size)
4. HANDLING PRECAUTIONS
• Keep the input cable away from the output cable. If installed close to each other, oscillation could occur.
• To avoid unit failures, never connect outputs of two or more channels in parallel.
• Only connect speakers with an impedance equal to or greater than those specified. Connecting speakers
with a smaller impedance than specified could cause damage to the unit.
• Periodically clean the filter located inside the ventilation panel on the unit's front panel. If the filter becomes
clogged, heat will become trapped inside the enclosure.
• Install the unit in locations where the temperature is between –10 and +40°C and the moisture is less than
90%RH (no dew condensation must be formed).
• To clean, be sure to first turn off this unit's power switch, 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.
• The fan is a consumable product. As a guideline, we recommend that it be replaced with a new one when its
total operating time reaches approximately 20000 hours (when used in ambient temperatures of
approximately 25°C).
Note: The above figure is simply a guideline, and does not guarantee the fan’s operating life. Since
broadcasts from the digital power amplifier could be disabled if the fan malfunctions, the fan requires
regular inspection and maintenance. For maintenance service, please contact the dealer from whom
the digital amplifier was purchased.
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5. INSTALLATION PRECAUTIONS
• The supplied power supply cord is designed for exclusive use with this unit. Never use it with other
equipment.
• When mounting the unit in an equipment rack, the inside of the rack must be sufficiently ventilated.
To achieve sufficient ventilation, remove all panels on the rear of the rack.
• When mounting the unit in the rack, also mount a Perforated Panel larger than 1U in size*:
(1) at the top and the bottom of the rack, and
(2) above and below every 5 units.
• Robust structure is one of the unit's main features. However, if the strength is particularly needed when
installing the unit in the rack, use a supporting runner for the safety purposes.
* 1U size = 44.5 mm (reference size)
The supplied rack-mounting screws can be used for the TOA equipment
rack only. Do not use them for other racks.
When installing the unit in a rack other than that of TOA, be sure to use
the screws with a diameter of over 5 mm and length of over 12 mm to
mount the unit.
Failure to do so may cause personal injury.
CAUTION
Power amplifiers
(5 units)
Power amplifiers
(5 units)
Perforated panel
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