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Digital Power Amplifier, 4x 500 W @ 70V (4x 550 W @ 8 ohms), 2x 1000 W Bridged @ 140V (2U)

The DA-550F-HL from TOA Electronics is a high-quality, rack mountable four-channel digital amplifier. Designed for highly efficient operation, the DA-550F-HL is capable of outputting 550W per channel at eight Ohms. Each channel has an individual level control knob, and all input connections are via 3-pin removable terminal block. Output connections are made on a standard screw terminal strip.

The DA-550F-HL has an internally settable high-pass filter, as well as built-in protection circuitry to protect against damage from overheating and overloads. Four front-panel air vents each offer removable dust filters for easy maintenance to ensure your amplifier keeps running smoothly. Bridged operation is available via simple push-button operation if desired.


Available Configuration Include:

DA-550F CU Digital Power Amplifier, 4x 550 W @ 4 ohms (4x 370 W @ 8 ohms), 2x 1100 W Bridged @ 8 ohms (2U)

DA-500F-HL features include:

  • Lightweight single rack space unit
  • Four removable terminal block inputs with front-panel level controls for each channel
  • Four outputs on a screw terminal strip
  • Built-in limiter and high pass filter
  • Efficient Class D circuitry
  • Low heat dissipation and power consumption
  • Protection circuitry prevents damage from overheating and overloads
  • Front panel LEDs for power, input, output, peak, and protect
  • Includes volume control caps to prevent unwanted level changes
Output Power 4 x 250W (19.6 Ohms)
2 x 500W (39.2 Ohms) (Bridge Mode)
Input Sensitivity +4dB (1.23V)/-10dB (0.24V) (Selectable with Inner Jumper)
Input Impedance 10 kOhms, Electronically Balanced
Gain Not Specified by Manufacturer
Frequency Response 50Hz - 20kHz (-3dB, +0db) (HPF On)
20Hz - 20kHz (±1dB) (HPF Off)
Signal-to-Noise Ratio 100dB
Total Harmonic Distortion (THD) 0.15% (1kHz)
0.3% (100Hz - 20kHz) (HPF On)
0.3% (20HZ - 20kHz (HPF Off)
Input Connections 4 x Removable 3-Pin Terminal Blocks
1 x AC Power In
Output Connectors 1 x M4 Screw Terminal Strip with 8 Terminals (2 Screw Terminals Per Channel)
Controls Front Panel 1 x On/Off Switch
4 x Input Volume Control Knobs
Controls (Rear) 2 x Bridge On/Off Buttons
1 x Ch. 1 Mode On/Off Button
Indicators 1 x Blue Power LED
4 x Green Input LEDs
4 x Yellow Output LEDs
4 x Red Peak LEDs
4 x Red Protect LEDs
Cooling 4 x Front-Panel Air Vents
Power Consumption 200W @ 1/8 Rated Output, 4 Channels
Dimensions (WxHxD) 1.75 x 19 x 15.7" (44 x 483 x 400mm)
Weight 14.5 lbs (6.6 kg)

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Prices and specifications subject to change without notice.