TOA a-9060dh Manuel D’Utilisation

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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 (70 V line, 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, 140 V line 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 (140 V line, 39.2 Ω) + 250 W (70 V line, 19.6
Ω) x 2 channels for DA-250FH.
Their wide range of applications include stores and permanent sound systems. 

• 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 or 1.75" (reference size)

• 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 (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 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.