DA-250DH 2-Channel Digital Power Amplifier – Optimized for 70V High-Impedance Systems

The DA-250DH is a high-efficiency, 2-channel digital power amplifier specifically engineered for 70V distributed audio systems. Delivering 250W x 2 channels at 19.6 ohms, it’s ideal for commercial AV applications requiring high-impedance speaker distribution. Each channel has an independent power section, and the lightweight, compact design ensures easy integration in space-sensitive environments.

Featuring a switching power supply for reduced energy consumption and heat output, the DA-250DH can be installed in a standard 1U EIA rack. For electrical isolation from the speaker system, the optional MT-251H Output Transformer can be attached. Perfect for AV integrators seeking reliable performance in corporate, education, retail, and hospitality installations.

Key Features – DA-250DH Digital Power Amplifier

  • 250W x 2 Channels at 19.6Ω: Designed for 70V high-impedance audio systems

  • Class D Efficiency: Delivers high power output with low heat and energy consumption

  • Independent Power Sections: Ensures stable, isolated performance per channel

  • Switching Power Supply: Lightweight, efficient, and reliable for long-term operation

  • Optional MT-251H Transformer: Allows electrical isolation from speaker systems

  • 1U Rackmount Design: Fits standard EIA equipment racks, ideal for tight installations

  • Compact & Lightweight: Simplifies transport, handling, and installation

  • Ideal for AV Integration: Perfect for commercial buildings, schools, hotels, and more

 

TOA DA-250DH  Specification

Power Source 120 V AC, 50/60 Hz
Amplification System Class D
Power Consumption 120 W (based on UL/CSA standards)
580 W (rated output 70 V line, 19.6 Ω × 2)
Input 2 circuits, +4 dB* (1.23 V) (input level control in maximum position),
10 kΩ, electronically-balanced, removable terminal block (3 pins),
XLR-3-31 type connector
CH 1 mode ON/OFF switch (ON: PARALLEL, OFF: STEREO)
Rated Output 2 channels: 250 W × 2 (70 V line, 19.6 Ω)
1 channel (BRIDGE): 500 W × 1 (140 V line, 39.2 Ω)
M4 screw terminal, distance between barriers: 8.8 mm (0.35")
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 (100℃ or more (212゜F)),
temperature rise inside the unit (80℃ or more (176゜F))
S/N Ratio 100 dB (A-weighted)
Crosstalk 70 dB (A-weighted)
LED Indicator Power (blue) × 1, Input (green) × 2, Output (yellow) × 2, Peak (red) × 2,
Protect (red) × 2
Cooling Forced air cooling
Operating Temperature -10℃ to +40℃ (14゜F to 104゜F)
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 (18.98" × 1.73" × 15.82")
Weight 5 kg (11.02 lb)
Accessory Power cord (2 m (6.56 ft)) …1, Removable terminal plug (3 pins) …2,
Tamper-proof cap …2
Option

Matching transformer: MT-251H

 

 

The DA Series multi-channel digital power amplifiers are ideal for multi-zone distributed speaker systems and professional sound applications. Engineered with Class D technology, the new DA Series amplifiers operate at 85 percent efficiency and consume almost one-third less power than conventional analog amplifiers. The compact and lightweight single or dual rack-space design and ultra-low heat dissipation allow designers to rack-mount up to five units without open space between units.

The DA Series is comprised of high and low impedance four-channel models each equipped with an independent power supply for each channel to assure continuous operation and unmatched reliability and performance. Other features include recessed stepped attenuators for precise gain calibration, removable dust filters for easy maintenance, and optional isolation transformer.

Competitively priced, the new DA Series multi-channel power amplifiers are backed by TOA's five-year warranty.

List price: $1,715.00
Price: $1,386.00
SKU: DA-250DH
Catalog: 
Commercial Amplifiers
Brand: 
TOA
Dimensions: 24 in × 23 in × 5 in
Weight: 18 lb