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).
TOA DA-250D Specifications
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Power Source
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120 V AC, 50/60 Hz
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Amplification System
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Class D
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Power Consumption
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120 W (based on UL/CSA standards)
650 W (rated output 4 Ω × 2)
420 W (rated output 8 Ω × 2)
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Input
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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)
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Rated Output
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2 channels: 250 W × 2 (4 Ω), 170 W × 2 (8 Ω)
1 channel (BRIDGE): 500 W × 1 (8 Ω)
M4 screw terminal, distance between barriers: 8.8 mm (0.35")
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Frequency Response
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20 - 20,000 Hz (±1 dB)
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Total Harmonic Distortion
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0.1% (1 kHz)
0.3% (20 - 20,000 Hz)
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Protection Circuit
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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))
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S/N Ratio
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100 dB (A-weighted)
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Crosstalk
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70 dB (A-weighted)
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LED Indicator
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Power (blue) × 1, Input (green) × 2, Output (yellow) × 2,
Peak (red) × 2, Protect (red) × 2
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Cooling
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Forced air cooling
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Operating Temperature
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-10℃ to +40℃ (14゜F to 104゜F)
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Operating Humidity
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90% RH or less (no condensation)
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Finish
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Panel: Aluminum, black, alumite Case: Plated steel sheet
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Dimensions
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482 (W) × 44 (H) × 401.8 (D) mm (18.98" × 1.73" × 15.82")
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Weight
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5 kg (11.02 lb)
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Accessory
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Power cord (2 m (6.56 ft)) …1, Removable terminal plug (3 pins) …2,
Tamper-proof cap …2
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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.
