DA-250FH 4-Channel Digital Power Amplifier – High-Efficiency 70V Amplifier for Multi-Zone Audio Systems

The DA-250FH is a 4-channel digital power amplifier designed specifically for 70V line high-impedance distributed audio systems. Delivering 250W x 4 channels at 19.6 ohms, this compact and lightweight Class D amplifier is engineered for AV integrators working in commercial environments such as offices, schools, retail spaces, and hospitality venues.

Each channel features an independent power section for stable, isolated operation, while the built-in switching power supply ensures high energy efficiency and low heat output. The DA-250FH fits in a standard 1U EIA equipment rack, optimizing space in crowded AV racks. For added flexibility, the optional MT-251H Output Transformer provides electrical isolation from the speaker system when needed.

Key Features – DA-250FH Digital Power Amplifier

  • 4 Channels x 250W @ 19.6Ω: Designed for 70V high-impedance distributed audio

  • Class D Design: High efficiency with minimal heat generation

  • Independent Power Sections: One per channel for enhanced stability and performance

  • Switching Power Supply: Lightweight and energy-saving architecture

  • Optional MT-251H Transformer: Enables electrical isolation from speaker lines

  • 1U Rackmount Size: Compact form factor fits standard EIA equipment racks

  • Lightweight and Durable: Ideal for installations where space and weight matter

    Commercial-Grade Reliability: Perfect for AV integrators in multi-zone systems

     

 

TOA DA-250FH SPECIFICATION

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

 

 

List price: $2,227.00
Price: $1,799.00
SKU: DA-250FH
Catalog: 
Commercial Amplifiers
Brand: 
TOA
Dimensions: 23 in × 23 in × 5 in
Weight: 21 lb