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The DA-250DH is a 2-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 2 channels (19.6 ohm 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).
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 (70 V line, 19.6 Ω) 1 channel (BRIDGE): 500 W × 1 (140 V line, 39.2 Ω) |
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 |
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 - 20,000 Hz): 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), 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) × 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 |
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