Digital Amplifier

The DA 428 is a fully digital multi-channel power amplifier with extensive audio DSP functionality and four Class D power amplifiers of the latest generation. Practical operating gestures make the handling of even complex functions very easy, such as the preset settings on the device.

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DA 428 (4x 700 W) DA 230 (2x 1500 W)


  • controller power amplifier in fixed installations
  • system operation with passive PA components (in actively separated PA systems)
  • monitor applications

Optional features

  • optional TCP/IP remote module and Dante module available
  • PresetEditor V2 software for creating and editing system presets


max. Output power @ 4 / 8 ohms 4x 700 / 400 W
Amplifier four fully digital high efficiency power amplifiers ≥ 90%
Frequency range 20 Hz – 20 kHz
S/N ratio (A-weighted /unweighted) 100 / 95 dB
Input sensity at maximum level analog 0 dB (775 mV) / digital -12 dBFS / without filters in output channel
Crosstalk @ 1 kHz > 90 dB
Damping factor @ 1 kHz > 500
THD @ 1 kHz < 0,5 %
Voltage gain @ 4 / 8 Ohm 36,7 dB
Slew rate (internal) > 70 V/µs
Slew time (internal) < 1,5 µs/V
Features (elektronic) per channel: gain, digital crossovers, subsonic filter, parametric EQs, dynamic processor, polarity, delay, matrix router
Protective circuits for individual channels: short circuit, DC voltage at output, low impedance; for entire device: under/overvoltage, overtemperature, overload
max. Power consumption 2600 W
Power requirements 90 - 250 V / 50 - 60 Hz, PowerCon input
Operation modes stereo, mono, 4-channel (free routing)
Control panel ground-free switch, navigation pad, 4x encoders with push function, 4x RGB LEDs, LCD graphic display, SD card slot
Connectors Line-In 4x XLR, Link-Out 4x XLR electronically balanced (max. 4x analog oder 2x digital & 2x analog); speaker output 4x Speakon NL4; RSNC module
DSP 24 bit, 48 MHz clocked
Unit delay < 1,5 ms
Sampling 24 bit
Digital input & -link inputs: AES/EBU & S/PDIF with format converter and sample rate converter (up to 192 kHz), link output: same as input format / 24 Bit, 48 kHz, AES/EBU
Preset memory internal: 12 presets, more presets on SD card
Dimensions (W x H x D) 483 x 88 x 375 mm (2 RU)
Weight 8,5 kg

In use / reference projects

This product is used in these reference projects: