Product information Hertz HMD8 DSP - 8-channel marine DSP amplifier

The HMD8 DSP, equipped with Hertz Marine DSP technology, offers a wealth of new highlights in listening pleasure.
The user-friendly DSP PC software interface makes the setup process a breeze and utilizes all the performance features of the installed speaker system.
The amazing power of 8x 85 W or 4x 260 W (RMS @ 4 Ohm) allows the HMD 8DSP to control the entire speaker system and generate tons of crystal clear sound pressure in up to three different zones of the vessel.
The "Power for the Waves" design philosophy features a robust extruded aluminum housing with a circuit board treated with anti-corrosion protection, ensuring years of listening pleasure on the open water.

Technologies

• Built-in DSP: Hertz Marine DSP technology allows you to move freely inside the boat and achieve a perfect surround effect even when listening outdoors.
• Multi-zone setup: Hertz Marine DSP optimizes the acoustic performance for each of the 3 configurable listening zones, regardless of where the speakers are installed and where the passenger is located within the zone, maximizing listening enjoyment while driving.
• Crossover filter: Filter type: full/high pass/low pass/band pass; Filter model and slope: Butterworth, Linkwitz-Riley, Bessel, Chebyshev, QLP quasi-linear phase
• Speaker dispersion adjustment: 0 - 510 cm (0 - 200.8 inches)
• Graphic parametric equalizer: 10 parametric poles (peaking, high shelf, low shelf, notch, allpass) ±12 dB gain, variable Q (0.5 - 16.0), 10 graphic poles
• PC software: With the Hertz Navigator software, pre-optimized software setup files can be created for a specific boat model and the associated installed audio system to ensure a correct acoustic result in the shortest possible time.
• Advanced D-Class: Thanks to the advanced D-CLASS output stage from Hertz, the HMD8 DSP combines maximum sound quality with unmatched efficiency and is very compact and easy to install anywhere on the boat.
• Corrosion resistant: The corrosion of the electronic components caused by use in humid environments is completely neutralized by the use of special marine-grade circuit boards (with epoxy coating).
• Salt spray resistant: To meet the standards required by ASTM-B117, Hertz Marine products are tested with massive salt spray to ensure complete corrosion resistance typical of this atmospheric exposure.
• Water jet tested: With an IP64 protection rating, all Hertz Marine products are fully protected against water jets of various types, making them very efficient in the marine environment.

Main features

• 8-channel Class D marine amplifier with DSP (1920 W)
• Channels: 8 / 4
• Output power: (RMS) @ 14.4 VDC, THD 1%
  - 8 Ch: 85 W x 8 (4 Ohm)
  - 8 Ch: 130 W x 8 (2 Ohm)
  - 4 Ch: 260 W x 2 (4 Ohm), bridged
• Supply voltage / fuse: 11 - 15 V DC / 2x 30 A
• Operating voltage range: 6.5 - 17 V
• No-load current (power ON/OFF): 1.6 A / 1.7 mA
• Current consumption @ 2 Ohm, 14.4 VDC (Max Musical Power): 55A
• Remote control IN: 6 - 15 V DC / 1 mA
• Remote control OUT: 4 - 15 V DC / 150 mA
• Attenuation factor @ 1kHz, 4 Ohm, 2 V RMS: > 110
• Distortion - THD (100Hz @ 4Ohm): 0.06%
• Bandwidth: 10 - 22kHz
• S/N Ratio (A at @ 1 V):
  - Master: 100 dBA
  - optical: 105 dBA
• Sensitivity
  - Preamplifier: 0.6 - 6 V RMS
  - Speaker-In: 2.2 - 22 V RMS
• Load impedance (min):
  - @8Ch: 2 Ohm
  - @4Ch: 4 Ohm
• Filter type: full-/high-pass/low-pass/band-pass
• Filter model and slope: Butterworth (6, 12, 18, 24, 30, 36, 42, 48, 54, 60 dB/oct.); Linkwitz-Riley (12, 24, 36, 48, 60 dB/oct.); Bessel (6, 12, 18, 24, 30, 36, 42, 48, 54, 60 dB/oct.); Chebyshev (6, 12, 18, 24, 30, 36, 42, 48, 54, 60 dB/oct.); QLP quasi-linear phase (6, 12 dB/oct.)
• Crossover frequency: 20 Hz - 20000 Hz integer values
• Phase control: 0° - 180°, all-pass equalizer poles
• Output equalizer: Graphic and parametric modes, n. 10 parametric poles (Peaking, High Shelf, Low Shelf, Notch, Allpass) ±12 dB gain, variable Q (0.5 - 16.0); n. 10 graphic poles
• Time alignment distance: 0 - 510 cm
• Time adjustment delay: 0 - 15 ms
• Time alignment step: 1 cm
• Time alignment fine tuning step: 1 sample
• Memories: n. 2 memories; n. 3 parametric poles for each memory (peaking, high shelf, low shelf) ±12 dB gain, variable Q (0.5 - 16.0)
• Preset: rotary switch for 7 installation presets