4-CHANNEL DIGITAL
POWER AMPLIFIERS
DA-250F/250FH/550F/500FH
Human Society with
Sound & Communication
Specifications are subject to change without notice.
Printed in Japan (0803) 833-52-362-4A u
TOA Corporation
www.toa.jp
SPECIFICATIONS
Model DA-250F DA-250FH DA-250D DA-250DH DA-550F DA-500F-HL
Power Req. 120V AC, 50/60Hz
Number of Channels 424
Total Output All Channel Driven 1000W (1kHz, 4Ω) 1000W (1kHz, 19.6Ω) 500W (1kHz, 4Ω) 500W (1kHz, 19.6Ω) 2200W (1kHz 4Ω) 400W (1kHz, 4Ω)
680W (1kHz, 8Ω) 340W (1kHz, 8Ω) 1400W (1kHz, 8Ω) 2200W (1kHz, 8Ω)
2000W (1kHz, 9.8Ω)
Output Voltage per Channel 31.6V (1kHz, 4Ω) 70V (1kHz, 19.6Ω) 31.6V (1kHz, 4Ω) 70V (1kHz, 19.6Ω) 46.9V (1kHz, 4Ω) 20V (1kHz, 4Ω)
36.9V (1kHz, 8Ω) 36.9V (1kHz, 8Ω) 52.9V (1kHz, 8Ω) 66.3V (1kHz, 8Ω)
70V (1kHz, 9.8Ω)
Output Current per Channel 7.9A (1kHz, 4Ω) 3.6A (1kHz, 19.6Ω) 7.9A (1kHz, 4Ω) 3.6A (1kHz, 19.6Ω) 11.7A (1kHz, 4Ω) 5A (1kHz, 4Ω)
4.6A (1kHz, 8Ω) 4.6A (1kHz, 8Ω) 6.6A (1kHz, 8Ω) 8.3A (1kHz, 8Ω)
7.1A (1kHz, 9.8Ω)
Power Output
8 ohms per channel 170W — 170W — 350W 550W
4 ohms per channel 250W — 250W — 550W 100W*
1
16 ohms bridged 340W — 340W — 700W 1100W
8 ohms bridged 500W — 500W — 1100W —
Hi-Z: 70V per channel — 250W — 250W — 500W
Hi-Z: 140V bridged, per channel — 500W — 500W — 1000W
Power Consumption*
Idle power consumption 56W, 1.0A 58W, 1.0A 28W, 0.5A 35W, 0.7A 63W, 1.2A 69W, 1.3A
Rated power consumption
1kHz 8 ohms 850W, 11.7A — 420W, 5.9A — 1650W, 22.4A 2600W, 33.2A
4 ohms 1300W, 16.9A — 650W, 8.7A — 2800W, 35.5A 580W, 9.1A
70 Volts — 1200W, 15.9A — 580W, 7.8A — 2350W, 30.4A
1/8 Power Pink noise*
2
8 ohms 183W, 3.0A — 102W, 1.7A — 317W, 5.2A 504W, 7.4A
4 ohms 257W, 4.2A — 132W, 2.3A — 658W, 9.7A 171W, 2.9A
70 Volts — 265W, 4.1A — 147W, 2.3A — 437W, 6.7A
1/3 Power Pink noise*
3
8 ohms 362W, 5.4A — 197W, 3.1A — 667W, 9.5A 1080W, 15.2A
4 ohms 597W, 8.6A — 308W, 4.4A — 1060W, 14.0A 313W, 4.9A
70 Volts — 609W, 8.5A — 311W, 4.5A — 1036W, 13.9A
1/8 Power 1kHz 8 ohms 152W, 2.5A — 84W, 1.4A — 277W, 4.5A 410W, 6.3A
4 ohms 219W, 3.5A — 112W, 1.8A — 510W, 7.6A 151W, 2.7A
70 Volts — 224W, 3.6A — 123W, 2.0A — 374W, 5.9A
1/3 Power 1kHz 8 ohms 314W, 4.7A — 160W, 2.5A — 519W, 8.6A 991W, 13.5A
4 ohms 507W, 7.3A — 222W, 3.4A — 958W, 13.0A 260W, 4.3A
70 Volts — 499W, 7.2A — 256W, 3.8A — 883W, 12.2A
Frequency Response
20Hz – 20kHz (±1dB) HPF ON: 50Hz – 20kHz 20Hz – 20kHz (±1dB) HPF ON: 50Hz – 20kHz 20Hz – 20kHz (–2dB, +1dB) HPF ON: 50Hz – 20kHz
(–3dB, 0dB) (–3dB, 0dB) (–3dB, +1dB)
HPF OFF: 20Hz – 20kHz HPF OFF: 20Hz – 20kHz HPF OFF: 20Hz – 20kHz
(±1dB) (±1dB) (–2dB, +1dB)
THD 0.1 % (1kHz) HPF ON: 0.1 % (1kHz), 0.1 % (1kHz) HPF ON: 0.1 % (1kHz), 0.1 % (1kHz) 0.1 % (1kHz)
0.3 % (20Hz – 20kHz) 0.3 % (100Hz – 20kHz) 0.3 % (20Hz – 20kHz) 0.3 % (100Hz – 20kHz) 0.15 % (20Hz – 20kHz)
HPF ON: 0.3 % (100Hz – 20kHz)
HPF OFF: 0.1 % (1kHz), HPF OFF: 0.1 % (1kHz),
HPF OFF: 0.3 %
0.3 % (20Hz – 20kHz) 0.3 % (20Hz – 20kHz)
(20Hz – 20kHz)
S/N Ratio (A weighted) 100dB
Crosstalk at 10kHz (A weighted) 70dB
DC Offset* ±5mV
Voltage Gain* 29.5dB 35.1dB 29.5dB 35.1dB 32.6dB 35.1dB
Damping Factor* 100 220 100 220 95 115
Inputs Input impedance 10kΩ (unbalanced), 20kΩ (balanced) 10kΩ (unbalanced), 20kΩ (balanced)
Input sensitivity +4dB (1.23V) +4dB (1.23V)
Input clipping 14V (25.1dBu) 12V (23.8dBu)
Protection Circuit
Amplifier section DC output, overheat protection, load shorting, overload current, maximum output
Power supply section Overheat protection, AC rush current
Cooling Continuously constant speed fan with front-to-rear airflow, Continuously constant speed fan with front-to-rear airflow,
50,000 hours life time at 25°C 100,000 hours life time at 25°C
Operating Temperature –10°C to +40°C (14°F to 104°F)
Operating Humidity Under 90% RH (no condensation)
Dimensions 482 (W) × 44 (H) × 401 (D)mm 482 (W) × 88.4 (H) × 404.2 (D)mm
(18.98" × 1.73" × 15.79") (18.98" × 3.48" × 15.91")
Weight 6.6kg (14.6 lb) 5kg (11.02 lb) 8.8kg (19.4 lb)
Finish Panel: Aluminum, alumite process, black/Case: Plated steel sheet
Accessory Euro style terminal block connector (3-pin) × 4, Euro style terminal block connector (3-pin) × 2, Euro style terminal block connector (3-pin) × 4,
Tamper-proof cap × 4 Tamper-proof cap × 2 Tamper-proof cap × 4
Option —
Matching transformer: MT-251H
—
Matching transformer: MT-251H
—
Matching transformer: MT-251H
0dB=0.775Vrms
*Typical data
*
1
For a 4
Ω
speaker, max. output is limited to 100W.
*
2
1/8 power with pink noise represents typical program with occasional clipping.
*
3
1/3 power with pink noise represents severe program with heavy clipping.
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