MULTI-CHANNEL
DIGITAL POWER AMPLIFIERS
DA-250F/250FH/250D/250DH/550F/500FH
Top-of-the-line operation and performance efficiency
Full
Digital
Amplifier
*
*Amplifiers feature switching-mode power supply and Class-D technology.
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 of the four channels.
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.
FEATURES
High efficiency
Extremely high amplification efficiency of 80-90%, resulting in reduction in power consumption by more than
60% compared with Class-AB amplifiers.
100
90
80
70
60
50
40
30
20
10
0
Efficiency vs Output
DA Series Amplifier Conventional AB-class Amplifier
20 40 60
Output (%)
80 100
Highly durable
Stands up to extended hours of operation. The DA amplifier has undergone a large number of rigorous tests to prove its durability. In addition,TOA has been conducting a “non-stop driving test” of the DA Series.
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.
Conventional Amp.
High reliability
The DA amplifier has a comprehensive protection circuitry for protection against excessive current flow due to overload, short circuit, unusual DC voltage output, power amplifier heat sink temperature rise (DA-250D/DH, DA-550F/500FH: over 100 °C, DA-250F/FH: over 110°C), power supply temperature rise (DA-550F/500FH: over 80 °C), and temperature rise inside the unit (DA-250D/DH, DA-250F/FH: over 80 °C).
Independent power supply
Each of the channels has its own power supply. If the power supply of Channel 1 should fail, this won't affect the operation of Channels 2-4. It is also possible to use one of the channels as a spare amplifier.
Conventional Amplifier
Power supply from transformer
Total: 16,000W
41U
DA-250F/FH Amp.
DA-500 Series Amp.
Total: 16,000W
21U
Total: 16,000W
19U
DA Series Amplifier
AC power supply
Power
Supply
Power
Supply
Power
Supply
Power
Supply
Power
Supply
Power Amplifier
With built-in power supply
Power Amplifier
Inside of DA-250F/FH model.
Design optimization for efficient and reliable high-level performance
The TOA DA-250F/FH, DA-250D/DH and DA-550F/500FH multi-channel power amplifiers offer a wider choice of power ratings, advanced
Class D amplification circuitry, and a highly efficient AC mains to output power ratio, for the complete technological superiority it takes to support long-term installation applications. These energy-efficient, space-saving amplifiers are designed to combine high levels of performance and efficiency, and are well-suited to ensure sound reinforcement reliability in a wide range of venue types. The “F” and “D” models are ideal for multi-zone applications such as presentation and pressconference rooms, restaurants and similar-sized locations. The "FH" and "DH" units are well-suited to such locations as exhibition halls, sports facilities, multipurpose halls and houses of worship.
DA-250D (rear)
DA-250F (rear)
DA-500FH (rear)
OPTION
MT-251H
Matching Transformer
Capacity: 0 – 250W
Primary impedance: 100V line: 40 Ω (250W), 70V line: 19.6Ω (250W)
Secondary impedance: 100V line: 40 Ω (250W), 70V line: 19.6Ω (250W), 50V line: 10Ω (250W), 35V line: 4.9Ω (250W)
Frequency response: 30Hz – 18kHz (+0dB, –3dB)
Connection terminal: M3 screw terminal, distance between barriers: 6.6mm
Dimensions:
Weight:
108(W) × 122(H) × 80(D) mm
2.4kg
SPECIFICATIONS
Model DA-250F
Power Requirement
Number of Channels
Total Output All Channel Driven
Output Voltage per Channel
Output Current per Channel
1000W (1kHz, 4
Ω)
680W (1kHz, 8 Ω)
31.6V (1kHz, 4 Ω)
36.9V (1kHz, 8 Ω)
7.9A (1kHz, 4 Ω)
4.6A (1kHz, 8
Ω)
Power Output
8 ohms per channel
4 ohms per channel
16 ohms bridged
8 ohms bridged
Hi-Z: 100V per channel
170W
250W
340W
500W
—
Power Consumption*
Idle power consumption 48W, 0.3A
Rated power consumption
1kHz 8 ohms 800W, 5.8A
4 ohms 1200W, 8.7A
100 Volts —
1/8 Power Pink nois* 1 8 ohmse 167W, 1.2A
4 ohms 248W, 1.6A
100 Volts —
1/3 Power Pink nois* 2 8 ohms 349W, 2.4A
4 ohms 511W, 3.7A
100 Volts —
DA-250FH DA-250D DA-250DH DA-550F
220 – 240V AC, 50/60Hz
4
1000W (1kHz, 40
Ω: 100V line) 500W (1kHz, 4Ω)
340W (1kHz, 8 Ω)
100V (1kHz, 40 Ω: 100V line) 31.6V (1kHz, 4Ω)
36.9V (1kHz, 8 Ω)
2.5A (1kHz, 40 Ω: 100V line) 7.9A (1kHz, 4Ω)
4.6A (1kHz, 8
Ω)
2
500W (1kHz, 40
Ω: 100V line) 2200W (1kHz 4Ω)
1400W (1kHz, 8 Ω)
100V (1kHz, 40 Ω: 100V line) 46.9V (1kHz, 4Ω)
52.9V (1kHz, 8 Ω)
2.5A (1kHz, 40 Ω: 100V line) 11.7A (1kHz, 4Ω)
6.6A (1kHz, 8
Ω)
—
—
—
—
250W
75W, 0.5A
170W
250W
340W
500W
—
27W, 0.3A
—
—
—
—
250W
46W, 0.5A
350W
550W
700W
1100W
—
57W, 0.4A
DA-500FH
4
2000W (1kHz, 20
Ω: 100V line)
100V (1kHz, 20 Ω: 100V line)
5A (1kHz, 20 Ω: 100V line)
—
—
—
—
500W
65W, 0.5A
—
—
1150W, 8.3A
—
—
270W, 1.9A
—
—
491W, 3.5A
400W, 2.8A
620W, 4.2A
—
95W, 0.8A
126W, 0.9A
—
184W, 1.3A
267W, 1.9A
—
—
—
580W, 3.9A
—
—
143W, 1.1A
—
—
278W, 2.0A
1550W, 11.3A
2750W, 19.9A
—
325W, 2.2A
442W, 2.7A
—
733W, 5.1A
1119W, 8.0A
—
—
—
2300W, 16.8A
—
—
493W, 3.1A
—
—
1026W, 7.4A
1/8 Power 1kHz
1/3 Power 1kHz
Frequency Response
THD
8 ohms 143W,1.0A
4 ohms 202W, 1.4A
100 Volts —
8 ohms 284W, 1.9A
4 ohms 437W, 3.0A
100 Volts —
20Hz – 20kHz ( ±1dB)
0.1 % (1kHz)
0.3 % (20Hz – 20kHz)
—
—
230W, 1.6A
79W, 0.7A
110W, 0.9A
—
—
—
443W, 3.0A
150W, 1.1A
215W, 1.5A
—
50Hz – 20kHz (-3dB, +1dB) 20Hz – 20kHz ( ±1dB)
0.1 % (1kHz)
0.3 % (100Hz – 20kHz)
0.1 % (1kHz)
0.3 % (20Hz – 20kHz)
—
—
128W, 1.0A
—
—
237.7W, 1.7A
273W, 1.8A
411W, 2.7A
—
632W, 4.4A
958W, 6.9A
—
—
—
399W, 2.6A
—
—
860W, 6.1A
50Hz – 20kHz (-3dB, +1dB) 20Hz – 20kHz (–2dB, +1dB) 50Hz – 20kHz (-3dB, +1dB)
0.1 % (1kHz)
0.3 % (100Hz – 20kHz)
0.1 % (1kHz)
0.15 % (20Hz – 20kHz)
0.1 % (1kHz)
0.3 % (100Hz – 20kHz)
S/N Ratio (A weighted)
Crosstalk at 10kHz (A weighted)
DC Offset*
Voltage Gain*
Damping Factor*
Inputs Input impedance
Input sensitivity
Input clipping
29.5dB
100 (1kHz, 8
Ω)
38.2dB
29.5dB
300 (1kHz, 40
Ω: 100V line) 100 (1kHz, 8Ω)
10k Ω (unbalanced), 20kΩ (balanced)
+4dB (1.23V)
14V (25.1dBu)
100dB
70dB
±5mV
38.2dB
32.6dB
300 (1kHz, 40
Ω: 100V line) 95 (1kHz, 8Ω)
38.2dB
240 (1kHz, 20
Ω: 100V line)
10k Ω (unbalanced), 20kΩ (balanced)
+4dB (1.23V)
12V (23.8dBu)
Protection Circuit
Amplifier section
Power supply section
Operating Temperature
Operating Humidity
Dimensions
DC output, overheat protection, load shorting, overload current, maximum output
Overheat protection, AC rush current
–10 °C to +40°C
Under 90% RH (no condensation)
482 (W) × 44 (H) × 401.8 (D)mm
5.3kg
482 (W) × 88.4 (H) × 404.2 (D)mm
9kg Weight
Finish
Accessories
6.8kg
Panel: Aluminum, alumite process, black/Case: Plated steel sheet
—
Power cord(2m) × 1,
Euro style terminal block connector (3-pin) × 4,
Tamper-proof cap
× 4, Rack mounting screw × 4
Matching transformer: MT-251H —
Power cord(2m) × 1,
Euro style terminal block connector (3-pin) × 2,
Tamper-proof cap
× 2, Rack mounting screw × 2
Matching transformer: MT-251H —
Power cord(2m) × 1,
Euro style terminal block connector (3-pin) × 4,
Tamper-proof cap
× 4, Rack mounting screw × 4
Matching transformer: MT-251H Option
0dB=0.775Vrms
*Typical data
* 1 1/8 power with pink noise represents typical program with occasional clipping.
* 2 1/3 power with pink noise represents severe program with heavy clipping.
Human Society with
Sound & Communication
TOA Corporation www.toa.jp
Specifications are subject to change without notice.
Printed in Japan (1302) 833-52-357-6B u
