MT-251H
Matching Transformer
DA-250DH
Digital Power Amplifier
DiscontinuedDA-250DH
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 (40 Ω 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).
- 70 V speaker outputs
- 2x 250 W rated power
- Class D design 85 % efficient
- Independent power supply for each channel
- Light weight and compact
- Stack up to 5 units without open spaces between units
- Selectable stereo or bridge operation (DA-250D)
- Forced-air cooling system
- Low heat dissipation
- Comprehensive protection circuitry
- Removable dust filters for easy maintenance
*0 dB = 0.775 V
Power Source
220 - 240 V AC, 50/60 Hz
Amplification System
Class D
Power Consumption
150 W (based on EN standards)
580 W (rated output 100 V line, 40 Ω x 2)
580 W (rated output 100 V line, 40 Ω x 2)
Rated Output
2 channels: 250 W x 2 (100 V line, 40 Ω)
M4 screw terminal, distance between barriers: 8.8 mm (0.35)
M4 screw terminal, distance between barriers: 8.8 mm (0.35)
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)
10 kΩ, electronically-balanced, removable terminal block (3 pins),
XLR-3-31 type connector
CH 1 mode ON/OFF switch (ON: PARALLEL, OFF: STEREO)
Frequency Response
50 Hz - 20 kHz (-3 dB, +1 dB)
Total Harmonic Distortion
0.1 % (1 kHz)
0.3 % (100 Hz - 20 kHz)
0.3 % (100 Hz - 20 kHz)
Signal to Noise Ratio
100 dB (A-weighted)
Crosstalk
70 dB (A-weighted)
Protection Circuit
Protection against excessive current flow due to overload,
short circuit, unusual DC voltage output,
temperature rise at power amp. heat sink (100 ℃ (212 ℉) or more),
temperature rise inside the unit (80 ℃ (176 ℉) or more)
short circuit, unusual DC voltage output,
temperature rise at power amp. heat sink (100 ℃ (212 ℉) or more),
temperature rise inside the unit (80 ℃ (176 ℉) or more)
LED Indicator
Power (blue) x 1, Input (green) x 2, Output (yellow) x 2, Peak (red) x 2,
Protect (red) x 2
Protect (red) x 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
Case: Plated steel sheet
Dimensions
482 (W) x 44 (H) x 401.8 (D) mm (18.98 x 1.73" x 15.82")
Weight
5.3 kg (11.68 lb)
Included Accessories
Power cord (2 m (6.56 ft) …1, Removable terminal plug (3 pins) …2,
Tamper-proof cap …2, Rack mounting screw (with plain washer) …4
Tamper-proof cap …2, Rack mounting screw (with plain washer) …4
Optional Accessories
Matching transformer: MT-251H
Please download Datasheet to access full specifications.
Functional & Interface Accessories
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