Hertz HMD8 DSP

Hertz HMD8 DSP - 8-Channel Marine Amplifier with DSP for up to 3 Zones

The Hertz HMD8 DSP is an 8-channel marine amplifier with integrated DSP, giving you clear control over up to three listening zones on board. With the intuitive PC software, you can precisely tune your system, efficiently distribute power, and reliably get punch and transparency from speakers and subwoofers in your boat. The robust design with corrosion-protected circuit board is built for continuous use in the marine environment – exactly what you need if you're looking for a clean, durable audio solution. Available at Carhifi.shop.

Technical Highlights

8 channels, stable 2-Ω capability per channel, and flexible bridging form the basis. The DSP offers extensive filter models, fine time alignment, parametric and graphic EQs, and memory slots for setups. This allows you to configure zones, delays, and levels to suit your boat and speaker combination.

Technical Data

• Power Supply
  • Operating voltage: 11 – 15 V DC / 2 × 30 A
  • Permissible supply voltage: 6.5 – 17 V
  • Idling current: 1.6 A
  • Switched off: 1.7 mA
  • Current draw at 14.4 V DC, 2 Ω, max music power: 55 A
  • Remote-IN voltage: 6 – 15 V DC (1 mA)
  • Remote-OUT voltage: 4 – 15 V DC (150 mA)
• Audio Specifications
  • Amplifier
    • Total Harmonic Distortion (THD) @ 1 kHz, 4 Ω, 70% rated power: 0.06%
    • Damping factor @ 1 kHz, 4 Ω, 2 VRMS: > 110
    • Frequency response (@ −1.5 dB): 10 Hz – 22 kHz
    • Signal-to-Noise Ratio (A-weighted @ 1 V input), Master Input: 100 dBA
    • Signal-to-Noise Ratio (A-weighted @ 1 V input), Optical Input: 105 dBA
    • Input Sensitivity Pre-In: 0.6 – 6 VRMS
    • Input Sensitivity Speaker-In: 2.2 – 22 VRMS
    • Minimum Load Impedance
      • 8 Channels: 2 Ω
      • 4 Channels bridged (1/2; 3/4; 5/6; 7/8): 4 Ω
  • Output Power (RMS) @ 28.8 V DC, 1% THD
    • 8 Channels @ 4 Ω: 85 W × 8
    • 8 Channels @ 2 Ω: 130 W × 8
    • 4 Channels bridged (1/2; 3/4; 5/6; 7/8) @ 4 Ω: 260 W × 4
• Digital Signal Processor (DSP)
  • Filter Types: Fullrange / High-pass / Low-pass / Band-pass
  • Filter Models and Slopes:
    • 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.
    • Quasi-linear QLP-Phase: 6, 12 dB/Oct.
  • Crossover Frequencies: 20 Hz – 20,000 Hz (integer values)
  • Phase Control: 0° – 180°
  • Output EQ:
    • Graphic and parametric modes: 10 parametric bands (Peaking, High Shelf, Low Shelf, Notch, All Pass), ±12 dB Gain, Q 0.5 – 16.0
    • 10 graphic bands
  • Time Alignment (TA)
    • Distance: 0 – 54 inches
    • Delay: 0 – 15 ms
    • Step size: 1 cm
  • Memory and Presets
    • 2 setups storable
    • Per memory: 3 parametric bands (Peaking, High Shelf, Low Shelf), ±12 dB Gain, Q 0.5 – 16.0
    • Preset rotary switch for 7 installation presets
• Physical Data
  • Dimensions (W × H × D): 238 × 49.5 × 155 mm
  • Weight: 1.98 kg
• Connections
  • Pre-amplifier Inputs (Pre-In)
  • Speaker Inputs (Speaker-In)
  • Optical Input
  • Remote-IN and Remote-OUT

Installation & Compatibility

The HMD8 DSP fits into compact installation spaces and powers speakers and subwoofers in up to three zones, depending on the setup. It is 2-Ω stable per channel and can be bridged to 4 Ω for more power (1/2; 3/4; 5/6; 7/8). The power supply is safely within 11–15 V DC for marine operation. Thanks to the corrosion-protected circuit board, the amplifier is suitable for use on the water. Control is conveniently done via the PC software – ideal for tuning, level and filter settings, and storing your presets.