TOA – DA550F – Amplifier – Power 4 x 550 Watt – 4 Ohm – 2RU Class D

$6,419.00 RRP Inc GST


DA-550F Digital Power Amplifiers




The DA-550F is a 4-Channel Digital Power Amplifier featuring lightweight, compact, high power output, and high efficiency. It delivers 550 W ƒx 4 channels (4 x› output) using a switching power supply. Each channel is equipped with an independent power section. Its Control/Monitor terminals permit power ON/OFF control of the individual channels and status monitoring for the power ON/OFF on each channel, protection on each channel, and fan operation. Prepare the control panel or status monitor display panel separately. It can be mounted in an EIA Standard equipment rack (2 unit size).




  • 4x 550 W rated output
  • 4 Ω speaker outputs
  • Light weight and compact
  • Class D design 85 % efficient
  • For 19″ cabinet rack mounting with 2 U height
  • Independent power supply for each channel
  • Selectable bridge operation
  • Forced-air cooling system
  • Low heat dissipation
  • Comprehensive protection circuitry
  • Status output (power, protection) and power on/off control per channel
  • Removable dust filters for easy cleaning




Power Source 120V AC, 50/60Hz
Number of Channels 4
Total Output All Channel Driven 2200W (1kHz 4Ω)
1400W (1kHz, 8Ω)
Output Voltage per Channel 46.9V (1kHz, 4Ω)
52.9V (1kHz, 8Ω)
Output Current per Channel 11.7A (1kHz, 4Ω)
6.6A (1kHz, 8Ω)
Power Output 8 ohms per channel 350W
4 ohms per channel 550W
16 ohms bridged 700W
8 ohms bridged 1100W
Power Consumption Idle power consumption 63W, 1.2A
Frequency Response 20Hz – 20kHz (–2dB, +1dB)
THD 0.1 % (1kHz)
0.15 % (20Hz – 20kHz)
S/N Ratio (A weighted) 100dB
Crosstalk at 10kHz (A weighted) 70dB
DC Offset ±5mV
Voltage Gain 32.6dB
Damping Factor 95 (1 kHz, 8Ω)
Inputs Input impedance 10kΩ (unbalanced), 20kΩ (balanced)
Input sensitivity +4dB (1.23V)
Input clipping 12V (23.8dBu)
Rear panel Input connectors Detachable Euro style terminal block connector (electrically balanced), XLR-3-31 type connector
Speaker output Screw terminal (M4). Accept AWG12-22
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, 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) × 88.4 (H) × 404.2 (D)mm (18.98″ x 3.48″ x 15.91″)
Weight 8.8kg (19.4 lb)
Finish Panel: Aluminum, alumite process, black/Case: Plated steel sheet
Accessory Euro style terminal block connector (3-pin) × 4, Tamper-proof cap × 4
SKU TOA-DA550F Categories , , , ,

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