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3. 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 Ωoutput) and 170 W x 2 channels (8 Ωoutput), and
the DA-250DH features a 250 W x 2 channels (19.6 Ωoutput) configuration.
Besides, each model's output is made available for bridge connection, allowing it to be used as a monaural
amplifier of 500 W (8 Ωfor DA-250D, 39.2 Ωfor DA-250DH).
Their wide range of applications include stores and permanent sound systems.

4. 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 to provide maximum connection ease.
• Input/output status LED indicators for each channel.
• Built-in protection circuitry disconnects the output when a short circuit, overload, or unusual temperature rise
occurs.
* 1U size = 44.5 mm or 1.75" (reference size)

5. 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 units in parallel.
• Only connect speakers with an impedance equal to or greater than those specified. Connecting speakers
with a smaller than specified impedance 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 (14°F and 104°F) and the
moisture is less than 90%RH (no dew condensation must be formed).
• 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.