DA-550F Multichannel Power Amplifier

DA-550F Multichannel Power Amplifier

The DA-550F is a 4-Channel Digital Power Amplifier featuring lightweight, compact, high power output, and high efficiency. It delivers 550 W × 4 channels (4 Ω 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).

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DA-550F Multichannel Power Amplifier

Power Source220 – 240 V AC, 50/60 Hz
Amplification SystemClass D
Power Consumption480 W (based on EN standards)
2750 W (rated output 4 Ω × 4)
1550 W (rated output 8 Ω × 4)
Input4 circuits, +4 dB* (1.23V) (input level control in max. position),
10 kΩ, electronically-balanced, removable terminal block (3 pins),
XLR-3-31 type connector
CH 1 mode ON/OFF switch (ON: CH 1 to All ch, OFF: Each ch)
Rated Output4 channels: 550 W × 4 (4 Ω). 350 W x 4 (8 Ω)
2 channels (BRIDGE): 1100 W × 2 (8 Ω)
M4 screw terminal, distance between barriers: 8.8 mm (0.35″)
Frequency Response20 Hz – 20 kHz (-2 dB, +1 dB)
Total Harmonic Distortion0.1 % (1 kHz)
0.15 % (20 Hz – 20 kHz)
Protection CircuitProtection against excessive current flow due to overload
short circuit, unusual DC voltage output,
temperature rise at power amp. heat sink (100 °C (212 °F) or more)
temperature rise inside the unit (80 °C (176 °F) or more)
S/N Ratio100 dB (A-weighted)
Crosstalk70 dB (A-weighted)
Control/MonitorControl input: Power ON/OFF status of the individual channels
photocoupler input, drive voltage: 9 V DC (Min) – 14 V (Max), 12 V (Typ)
Monitor output: Power ON/OFF status of the individual channels,
Protection status of the individual channels,
Fan operation status
photocoupler open collector output, withstand voltage: 30 V DC,
control current: 12 mA or less
Connector: RJ-45 connector × 2
Connection cable: Shielded Category 5 twisted pair cable for LAN (CAT5-STP)
Maximum cable distance: 600 m (656.17 yd)
LED IndicatorPower (blue) × 1, Input (green) x 4, Output (yellow) x 4, Peak (red) x 4,
Protect (red) × 4
CoolingForced air cooling
Operating Temperature-10 °C to +40 °C (14 °F to 104 °F)
Operating Humidity90 %RH or less (no condensation)
FinishPanel: Aluminum, black, alumite
Case: Plated steel sheet
Dimensions482 (W) × 88.4 (H) × 404.2 (D) mm (18.98 × 3.48″ × 15.91)
Weight9 kg (19.84 lb)
AccessoryPower cord (2 m (6.56 ft)), Removable terminal plug (3 pins) x 4,
Tamper-proof cap x 4, Rack mounting screw (with washer) x 4


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