TOA-DA-250FH 4 Channel Power Amplifier

TOA-DA-250FH 4 Channel Power Amplifier

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 × 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).

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Product Description

Power Source 120 V AC, 50/60 Hz
Amplification System Class D
Power Consumption 200 W (based on UL/CSA standards)
1200 W (rated output 70 V line, 19.6 Ω × 4)
Input 4 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 Output 4 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 Response 20 – 20,000 Hz (±1 dB): HPF OFF/50 – 20,000 Hz (-3 dB, +1 dB): HPF ON
(selectable with the inner jumper)
Total Harmonic Distortion 0.1% (1 kHz), 0.3% (20 – 20,000Hz): HPF OFF
0.1% (1 kHz), 0.3% (100 – 20,000 Hz): HPF ON
Protection Circuit Protection 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 Ratio 100 dB (A-weighted)
Crosstalk 70 dB (A-weighted)
LED Indicator Power (blue) × 1, Input (green) × 4, Output (yellow) × 4,
Peak (red) × 4, Protect (red) × 4
Cooling Forced air cooling
Operating Temperature -10℃ to +40℃
Operating Humidity 90% RH or less (no condensation)
Finish Panel: Aluminum, black, alumite Case: Plated steel sheet
Dimensions 482 (W) × 44 (H) × 401.8 (D) mm
Weight 6.6 kg
Accessory Power cord (2 m) …1, Removable terminal plug (3 pins) …4,
Tamper-proof cap …4
Option Matching transformer: MT-251H

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