TOA Multichannel Power Amplifier - DA250FHCU

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The DA-250FH is a 4-Channel Digital Power Amplifier designed for 70 V line high-impedance distribution and features lightweight, compact, high power output, and high efficiency. It delivers 250 W x 4 channels (19.6 Ω output) using a switching power supply. Each channel is equipped with an independent power section. It can be electrically isolated from the high-impedance speaker system by attaching the MT-251H Output Transformer (optional). It can be mounted in an EIA Standard equipment rack (1 unit size).

Power Source120 V AC, 50/60 Hz
Amplification SystemClass D
Power Consumption200 W (based on UL/CSA standards), 1200 W (rated output 70 V line, 19.6 Ω × 4)
Input4 circuits, +4 dB* (1.23 V) (input level control in maximum position), 10 kΩ, electronically-balanced, removable terminal block (3 pins), CH 1 mode ON/OFF switch (ON: CH 1 to All ch, OFF: Each ch)
Rated Output4 channels: 250 W × 4 (70 V line, 19.6 Ω), 2 channels (BRIDGE): 500 W × 2 (140 V line, 39.2 Ω), M4 screw terminal, distance between barriers: 8.8 mm
Frequency Response20 - 20,000 Hz (±1 dB): HPF OFF/50 - 20,000 Hz (-3 dB, +1 dB): HPF ON (selectable with the inner jumper)
Total Harmonic Distortion0.1% (1 kHz), 0.3% (20 - 20,000Hz): HPF OFF, 0.1% (1 kHz), 0.3% (100 - 20,000 Hz): HPF ON
Protection CircuitProtection against excessive current flow due to overload, short circuit, unusual DC voltage output, temperature rise at power amp. heat sink (110℃ or more), temperature rise inside the unit (80℃ or more)
S/N Ratio100 dB (A-weighted)
Crosstalk70 dB (A-weighted)
LED IndicatorPower (blue) × 1, Input (green) × 4, Output (yellow) × 4, Peak (red) × 4, Protect (red) × 4
CoolingForced air cooling
Operating Temperature-10℃ to +40℃
Operating Humidity90% RH or less (no condensation)
FinishPanel: Aluminum, black, alumite Case: Plated steel sheet
Dimensions482 (W) × 44 (H) × 401.8 (D) mm
Weight6.6 kg
AccessoryPower cord (2 m) …1, Removable terminal plug (3 pins) …4, Tamper-proof cap …4
OptionMatching transformer: MT-251H

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