TOA Electronics DA-250FH CU - Manual (Page 6)

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3. 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 (19.6
Ω output) configuration.
Besides, each model's output is made available for bridge connection, allowing it to be used as a stereo
amplifier of 500 W (8
Ω for DA-250F, 39.2 Ω for DA-250FH) x 2 channels or a 3-channel amplifier of 500 W (8
Ω) + 250 W (4 Ω) x 2 channels for DA-250F, 500 W (39.2 Ω) + 250 W (19.6 Ω) x 2 channels for DA-250FH.
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 all channels, and the output volume adjusted using the input
volume 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 (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 and the moisture is less than
90% (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.