DA-550F 4-Channel Digital Power Amplifier – High Power with Intelligent Monitoring for Pro AV Installations

The DA-550F is a high-performance 4-channel digital power amplifier delivering 550W per channel at 4 ohms, designed for demanding commercial audio applications. Ideal for AV integrators, this Class D amplifier features a compact, 2U rackmount chassis, independent power sections per channel, and a highly efficient switching power supply to reduce heat and energy use.

The DA-550F also includes Control/Monitor terminals, allowing remote ON/OFF control and real-time status monitoring of each channel. Integrators can track power status, protection states, and fan operation—critical for large-scale or mission-critical AV systems. Control and monitoring panels must be prepared separately for system integration. Built for reliability, the DA-550F is a powerful and scalable solution for corporate, education, hospitality, and other commercial installations.

Key Features – DA-550F Digital Power Amplifier

  • 4 Channels x 550W @ 4Ω: High-output Class D amplifier for commercial audio

  • Independent Power Sections: Ensures stable, isolated channel operation

  • Switching Power Supply: Efficient and lightweight design with low heat generation

  • Remote Control/Monitoring Terminals:

    • ON/OFF control per channel

    • Status monitoring (power, protection, fan operation)

  • Custom Control Panel Support: Easily integrates into larger AV systems

  • 2U Rackmount Size: Fits EIA standard racks, ideal for pro AV environments

  • Compact and Lightweight: Simplifies transport and installation

  • Reliable for Demanding Systems: Engineered for long-term commercial use

TOA DA-550F SPECIFICATION

Power Source 120 V AC, 50/60 Hz
Amplification System Class D
Power Consumption 480 W (based on UL/CSA standards), 2800 W (rated output 4 Ω), 1650 W (rated output 8 Ω)
Input 4 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: CH 1 to All ch, OFF: Each ch)
Rated Output 4 channels: 550 W × 4 (4 Ω), 350 W × 4 (8 Ω)
2 channels (BRIDGE): 1100 W × 2 (8 Ω)
M4 screw terminal, distance between barriers: 8.8 mm (0.35")
Frequency Response 20 - 20,000 Hz (-2 dB, +1 dB)
Total Harmonic Distortion 0.1% (1 kHz)
0.15% (20 - 20,000 Hz)
Protection Circuit Protection against excessive current flow due to overload, short circuit,
unusual DC voltage output, temperature rise at power amp. heat sink (100℃ or more (212゜F)),
temperature rise at power supply heat sink (80℃ or more (176゜F))
S/N Ratio 100 dB (A-weighted)
Crosstalk 70 dB (A-weighted)
Control/Monitor Control 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: Under 12 mA
Connector: RJ-45 connector × 2
Connection cable: Category 5 twisted pair cable for LAN (CAT5-UTP)
Maximum cable distance: 600 m (656.17 yd)
LED Indicator Power (blue) × 1, Input (green) × 4, Output (yellow) × 4, Peak (red) × 4, Protect (red) × 4
Cooling Forced air cooling
Operating Temperature -10℃ to +40℃ (14゜F to 104゜F)
Operating Humidity 90% RH or less (no condensation)
Finish Panel: Aluminum, black, alumite Case: Plated steel sheet
Dimensions 482 (W) × 88.4 (H) × 404.2 (D) mm (18.98" × 3.48" × 15.91")
Weight 8.8 kg (19.4 lb)
Accessory Removable terminal plug (3 pins) …4, Tamper-proof cap …4

 

 

List price: $3,721.00
Price: $3,008.00
SKU: DA-550F
Catalog: 
Commercial Amplifiers
Brand: 
TOA
Dimensions: 24 in × 24 in × 6 in
Weight: 22 lb