TOA Digital Multi-Channel 250 Watt x 2 Power Amplifier 4 ohm ( DA250DCUA00)

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The DA-250D is a 2-Channel Digital Power Amplifier featuring lightweight, compact, high power output, and high efficiency. It delivers 250 W x 2 channels (4 ohm output) using a switching power supply. Each channel is equipped with an independent power section. It can be mounted in an EIA Standard equipment rack (1 unit size).

Full Digital Amplifier

TOA Digital Amplifier technology redefines the very concept of amplifiers.

The power supply unit is the heart of the amplifier. To ensure consistently high performance and reliable operation, TOA engineers have given the DA Series a system that provides power independently to each channel. This testifies to TOA's attitude to product development, which is always totally motivated by the desire to provide high-quality products that offer worry-free use. Never compromise — that's the TOA philosophy

High efficiency

Extremely high amplification efficiency of 80-90%, resulting in reduction in power consumption by more than 60% compared with Class-AB amplifiers.

Amplifier with world-class lightweight design*

Installation has become much easier thanks to the lightweight design. *TOA comparative data (weight/watt)

Compact design

The DA-250 Series is 1-unit size and the DA-500 Series is 2-unit size, and they can be efficiently mounted on a rack, so they require only a small installation space. Because the amplifiers do not generate much heat, 5 units can be stacked together in a rack.

Power Amplifier

Power Source

120 V AC, 50/60 Hz

Amplification System

Class D

Power Consumption

120 W (based on UL/CSA standards)

Rated Output

2 channels: 250 W × 2 (4 Ω), 170 W × 2 (8 Ω)
1 channel (BRIDGE): 500 W × 1 (8 Ω)


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

Frequency Response

20 - 20,000 Hz (±1 dB)

Total Harmonic Distortion

0.1% (1 kHz), 0.3% (20 - 20,000 Hz)

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), temperature rise inside the unit (80℃ or more)

S/N Ratio

100 dB (A-weighted)


70 dB (A-weighted)

LED Indicator

Power (blue) × 1, Input (green) × 2, Output (yellow) × 2,
Peak (red) × 2, Protect (red) × 2


Forced air cooling

Operating Temperature

-10℃ to +40℃ (14°F to 104°F)

Operating Humidity

90% RH or less (no condensation)


Panel: Aluminum, black, alumite
Case: Plated steel sheet


482 (W) × 44 (H) × 401.8 (D) mm (18.98" × 1.73" × 15.82")


5 kg (11.02 lb)


Power cord (2 m (6.56 ft)) …1
Removable terminal plug (3 pins) …2
Tamper-proof cap …2

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