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  • 6,400 W, 2 x 2,400 W + 2 x 800 W an 4 Ω
  • 4 channel DSP amplifier with dual-technology
  • 2 power supplys, DSP-boards and Class-D module
  • Integrated loudspeaker management systems (DSP) with audiophile sound quality
  • 2 x 80 preset locations, including 2 different presets assignable simultaneously
  • Software control via Ethernet interface (HDSP-4A also USB)
  • Intelligent wide-range switching power supplies with automatic worldwide voltage adjustment
  • Dust protected by modular upside-down board assembly
  • Very quiet, temperature controlled low-noise EBM Papst fan
  • Tough, road-ready, stable and yet light aluminum housing


  • Quantity channel
    4 CH, class-D latest generation

    Power output 4 Ω
    6,400 W (2 x 2,400 W + 2 x 800 W)

    Power output 8 Ω
    4,060 W (2 x 1,580 W + 2 x 450 W)

    Power output 16 Ω
    2,000 W (2 x 800 W + 2 x 200 W)

    Damping factor
    > 1000 / 8 Ω, 1 KHz

    Frequency responce
    20 ~ 20,000 Hz

    < 0.05 % (20 ~ 20,000 Hz with 8 Ω)

    Signal-to-noise ratio
    > 118 dB (20 ~ 20,000 Hz with 8 Ω)

    Intelligent PFC wide-range power supply with soft start and automatic voltage selection:
    85 - 135 V = 110 / 115 / 120 V Betrieb, 190 - 265 V = 220 / 230 / 240 V Betrieb, 50/60 Hz

    1 x 16 A Neutrik PowerCon IN

    Signal connection analog INPUT/LINK
    4 x XLR female/male

    Signal connection digital AES/EBU INPUT/LINK
    2 x XLR female/male (only HDSP-4D)

    Speaker Connections
    2 x Speakon

    Network connection
    Additional rear RJ45 socket for wired network in fixed installations (only HDSP-4A)
    Additional rear DSP-LAN socket for wired network in fixed installations (only HDSP-4D)

    2 x temperature-controlled EBM-Papst low noise axial fan, air flow front to back

    Input limiter, peak limiter
    Start-up current limiting (soft start)
    Protection circuit on and off transients
    Under and over-voltage protection
    DC-protection of outputs
    Temperature monitoring of the heatsink and transistors

    Realtime software-monitoring
    Loudspeaker impedance measuring from each output channel (line-control)
    Temperature measuring from each ampmodule
    Real time meterbridge on PC per channel
    Real time access for configuration on each channel
    Speaker group building for access multiple speakers with one command

    DSP sampling
    64 bit, 96 kHz sample rate

    DSP preset memory quantity
    2 x 80 preset locations, including 2 different presets assignable simultaneously

    0 - max. 500 microsecond

    Dynamic range input
    120 dB

    Nominal input level
    + 6 dBu

    Maximum input level
    + 23 dBu

    Two per way, in each input and output

    10 parametric filter each in- and output, use as Bell, Shelving, Notch, or Allpass filter

    Long delay section
    0 - 800 ms (max. 275 m delay) in each input

    Short delay section
    0 up to 17 ms (max. 6 m delay) per output for time alignment between the acoustic centers

    Phase adjustment
    0 - 180°

    Butterworth, Bessel, Linkwitz-Riley Filter

    Bi-directional realtime VA-WLAN-remote network, software for PC and MAC

    Manual hand operation
    with 4 x button and 2 x digital encoder-wheel in the internal menu navigation, function lockable

    2 x LED display
    2 x LCD display with software dimmable and switchable

    Body housing
    19"/2 HE, 430 mm deep, strong black colored aluminum housing

    6.6 kg

  • The HDSP-4A and 4D are 4-channel DSP amplifier with dual technology and have an output power of 6.400 W into 4 Ω.

    The Voice-Acoustic HDSP amplifier series has been developed with the most demanding requirements in audio quality and reliability in mind. With the high number of output channels, for the first time, it has become possible to separately filter bi and tri amping with the HDSP series cost effectively. The intelligent wide-range switching power supply automatically detects the AC input values making it possible to use anywhere in the world.

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