TOA DA-250DH CU 2-Channel Digital Power Amplifier, 250W

The TOA 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 DA Series amplifiers operate at 85 percent efficiency and consume almost one-third less power than conventional analog amplifiers. The compact and lightweight 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 DA Series multi-channel power amplifiers are backed by TOA’s five-year warranty.

The DA-250DH is a 2-Channel Digital Power Amplifier designed for 70V line high-impedance distribution and features lightweight, compact, high power output, and high efficiency. It delivers 250W × 2 channels (19.6Ω 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).

Includes:

• Power cord (2m (6.56ft)) x1
• Removable terminal plug (3 pins) x2
• Tamper-proof cap x2

Features:

• DA-250DH: 2x250W (70V), 1x500W bridged (140V), Highpass filter
• Class D design – 85% efficient!
• 30% lower power consumption than conventionalamplifiers
• Stack up to 5 units without open spaces between units
• Lightweight (14.6 to 19.4lbs.)
• Independent power supply for each channel
• Low heat dissipation
• Recessed stepped attenuaters
• Comprehensive protection circuitry
• Removable dust filters for easy maintenance
• Optional transformer: Isolation transformer, model MT-251H
• Five year warranty

Specifications:

• Power Source: 120VAC, 50 / 60Hz
• Amplification System: Class D
• Power Consumption:
• 120W (based on UL / CSA standards)
• 580W (rated output 70V line, 19.6Ω × 2)
• Input: 2 circuits, +4dB* (1.23V) (input level control in maximum position), 10kΩ, 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: 250W × 2 (70V line, 19.6Ω)
  • 1 channel (BRIDGE): 500W × 1 (140V line, 39.2Ω)
  • M4 screw terminal, distance between barriers: 8.8mm (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% (1kHz), 0.3% (20 - 20,000Hz): HPF OFF
  • 0.1% (1kHz), 0.3% (100 - 20,000Hz): 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°C or more (212°F)), temperature rise inside the unit (80°C or more (176°F))
• S/N Ratio: 100dB (A-weighted)
• Crosstalk: 70dB (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°C to +40°C (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) × 401.8mm (D) - (18.98" × 1.73" × 15.82")
• Weight: 5kgs (11.02lbs)