4
• 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.
2. GENERAL DESCRIPTION
TOA's DA-250D and DA-250DH Dual Power Amplifiers feature high power handling capabilities and durability.
The DA-250D is configured with 250 W x 2 channels (4
Ω
output) and 170 W x 2 channels (8
Ω
output), and
the DA-250DH features a 250 W x 2 channels (100 V line, 40
Ω
output) configuration. Besides, the DA-250D's
output is made available for bridge connection, allowing it to be used as a 500 W (8
Ω
) monaural amplifier.
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 both channels 1 and 2, and the output level adjusted using the
input level control for each channel.
• Electronically-balanced inputs.
• Input terminals employ removable terminal blocks and XLR type connectors 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)
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.
