Hertz HMD8 DSP 24V

Hertz HMD8 DSP 24V - 8-Channel Marine Amplifier with DSP for 24V Electrical Systems

The Hertz HMD8 DSP 24V is an 8-channel marine amplifier with integrated DSP that efficiently uses your 24V onboard electrical system and allows for multiple zones or powerful bridged configurations. The extruded aluminum chassis and corrosion-protected PCB are designed for marine use. With 8 x 85 W RMS at 4 Ohm or 4 x 260 W RMS bridged at 4 Ohm, it delivers stable power and clean control – including extensive DSP functions for precise tuning.

Technical Highlights

• 8 channels for multi-zone setups onboard or as 4 bridged channels for more power
• RMS power at 28.8 VDC, 1% THD:
  • 8 x 85 W at 4 Ohm
  • 8 x 130 W at 2 Ohm
  • 4 x 260 W bridged at 4 Ohm (1/2; 3/4; 5/6; 7/8)
• Marine-grade construction: aluminum chassis, corrosion-protected PCB
• Integrated DSP with flexible filters, extensive EQ section, and time alignment

Power Supply & Control

• Operating voltage: 22 – 34 VDC / 2 x 15 A
• General voltage range: 14 – 36 V
• Idle current: 0.96 A
• Shutdown current: 1.6 mA
• Max. current consumption (musical) @ 14.4 VDC, 2 Ohm: 27.5 A
• Remote-IN: 6 – 34 V
• Remote-OUT: 14 – 34 VDC

Audio Specifications (Amplifier)

• THD (Total Harmonic Distortion) @ 1 kHz, 4 Ohm, 70% rated power: 0.06%
• Damping factor @ 1 kHz, 4 Ohm, 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
  • Optical input: 105 dBA
• Input sensitivity:
  • Pre-In: 0.6 – 6 VRMS
  • Speaker-In: 2.2 – 22 VRMS
• Minimum load impedance:
  • per channel (8 channels): 2 Ohm
  • bridged (4 channels): 4 Ohm

DSP Functions

• Filter types: Full-range / 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 steps)
• Phase control: 0° – 180°
• Output EQ:
  • Parametric: 10 bands (Peaking, High Shelf, Low Shelf, Notch, All Pass), ±12 dB, Q 0.5 – 16.0
  • Graphic: 10 bands
• Time Alignment:
  • Distance: 0 – 54 inches
  • Delay: 0 – 15 ms
  • Step size: 1 cm
• Memory:
  • 2 setups
  • per memory additionally 3 parametric bands (Peaking, High Shelf, Low Shelf), ±12 dB, Q 0.5 – 16.0

Physical Data

• Dimensions (W x H x D): 238 x 49.5 x 155 mm
• Weight: 1.98 kg

Installation & Compatibility

• Designed for 24V electrical systems, wide operating range 22 – 34 VDC
• Flexible system planning: 8-channel operation for zones or bridged as 4 powerful channels
• Wide-range Remote (IN/OUT) for easy integration into existing boat systems