High power class D DSP amplifier

Class D digital amplifier
Integrated DSP
4 channels (bridgeable)
4 x 3000W into 4 Ω

The DA50:4 is a 4 channel fixed switch-mode frequency class D power amplifier. Four bridgeable channels allow all sorts of configurations of cabling depending on speakers and impedance load. Precise gain and sensitivity setting is obtained via internal digital gain control.

The DA50:4 delivers high power and sonic quality thanks to a careful design of all its components. The state-of-the-art switch-mode power technology allows high output power with superior efficiency. The DA50:4 has a very high level of reliability thanks to its numerous protections against clipping, high voltages or current, and driver overexcursion and overheating. Its functional parameters, mains voltage, current draw, impedance load or protection trigger, are monitored and saved. The temperature is carefully controlled by variable-speed forced-air cooling. The DA50:4 is lighter than most amplifiers and fits in only two rack units to ease transport and handling. The device can be configured via its front panel LCD screen, and via PC connexion thanks to its RS45 port and a modern TCP-based protocol.
The DA50:4 is a 4-channels amplifier for high power applications. It uses the same internal technology than the DA15:4 but is more powerful, and offers compatible performance. Its integrated 4-channel DSP is based upon the same technology than the DMS48, with a modular control of presets, grouping functionilities and advanced speaker protections.

Its characteristics are high dynamic and power capacities, combined with a sturdy and ergonomic design that perfectly meets the requirements of live events and shows, in fixed installation as well as in touring. Thanks to its performance in terms of power, it naturally suits APG high power systems such as Matrix Array, Uniline, Uniline Compact, and “TB” series subwoofers. The DA50:4 amplifier can oper under 8, 4 or 2 Ω loads. The bridged mode allows high-voltage operation into 4 to 16 Ω loads. The DA50:4 must be used according to APG recommended combinations of speakers and processors.


• High audio quality
• Integrated DSP
• Performance and power efficiency
• Protection circuits for reliability
• ALM Control software


• High quality sound reproduction
• High power amplification
• Large scale APG systems



4 Analog, 2 AES3, (4 NetAudio)*

RMS output power

2 Ω

4x 5000 w

 for each channel


4x 3000 w


4x 1500 w

  70/100v 4x 3500 w
  Bridge 4 Ω 2x 10000 w


AC mains power  

Main Power supply

3rd Generation Series Resonant



Frequency response

5 Hz – 20 kHz (@ 4Ω, ±0.5 dB)

S/N ratio

>106 dBA (20 Hz - 20 kHz, A weighted)

Crosstalk separation

> -85dBr @ 1kHz and > -75dBr @ 10kHz

THD (Total Harmonic Distorsion)

<0.05% typical, 1kHz signal, AES17 filter, @4Ω


Rear Panel  

Audio input

Analog: 2 x balanced Neutrik® XLR female; AES3: use channel 2 XLR

Audio output

Analog: 2 x balanced Neutrik® XLR male

Speaker output

2 x Neutrik® Speakon NL4MD

Network data port RS485

1 x RJ45 with 2 recessed rotary encoders for ID selection



Dimensions (H, W, D)

2 U x 19" x 14" (88 x 483 x 357 mm)


12.5 kg / 27.5 lbs