| Channels | 8 |
| Class | ADC (Advanced D-Class) |
| Efficiency | 84.5% (4 ohms rated power) |
| Power supply voltage / fuse | 11 ÷ 15 VDC |
| Idling current | 2.5 A |
| Standby Current Draw | 1.7 mA |
| Consumption @ 14.4 VDC, 2Ω, Max Musical Power | 90 A |
| Remote IN | 4 ÷15 VDC (1 mA) |
| Remote OUT | 6.5 ÷15 VDC (150 mA) |
| Distortion - THD @ 1 kHz, 4Ω, 70% Rated Power | <0.04% THD+N @70% Rated Output Power, 4Ω, 1kHz |
| Bandwidth @ -1.5 dB | 10 - 42k Hz |
| Damping factor @ 1 kHz, 4Ω, 2 VRMS | 125 |
| S/N ratio (A weighted @ 1 V Input) Master Input | 98 dBA |
| Total Power RMS | 2000 W |
| Minimum load impedance | 2 ohms (STEREO) / 4ohms (BRIDGE) |
| Output Continuous Power (RMS) @14.4 VDC, 1% THD |
160W x 8 (4ohms) 250W x 8 (2ohms) 500W x 4 (4ohms - Brigde 1/2, 3/4, 5/6, 7/8) |
| Pre-In Inputs | 0.6 ÷ 6 Vrms (11 kΩ Impedance) |
| Digital Input | Yes |
| Pre Outputs | 6 |
| Low Level Inputs | 12 |
| Input Optical IN | Coaxial S/PDIF , Max 96 kHz / 24 bit |
| Sub Out (RCA Pre Out) | 6 Vrms |
| Programmable Trigger Wires | 4 |
| Audio DSP Converter | 2 x Analog Devices ADAU1467 automotive qualified audio processor. |
| Filter type | Full / High-Pass / Low-Pass / Band-Pass |
| Filter mode and slope |
Linkwitz-Riley @ 12/24/36/48 dB/Oct. Butterworth @ 6/12/18/24/30/36/42/48 dB/Oct. Bessel @ 6/12/18/24/30/36/42/48 dB/Oct. Chebyshev @ 6/12/18/24/30/36/42/48 dB/Oct. QLP @ 6 dB/Oct. |
| Crossover frequency | 20 Hz ÷ 20 kHz |
| Phase control | 0° / 180°, All-Pass filters |
| Analog Input Equalizer (20 ÷ 20k Hz) | 12 Biquad + Delay |
| Output Equalizer | Parametric/Graphic Biquad: 15 poles, 20 Hz ÷ 20 kHz |
| Time Alignment Distance | 0 ÷ 510 cm / 0 ÷ 200.8 inches |
| Time Alignment Delay | 0 ÷ 15 ms |
| Time Alignment Step | 0.01ms |
| Input Output Real Time Audio Monitor | Yes |
| DRC Port | CAN-BUS |
| ADC Port | RS-232 |
| 1 Wire | Customizable functions (+ 12 V activated) over 4 Control Inputs |
| From / To Personal Computer | USB-C 1.1 / 2.0 / 3.0 Compatible |
| PC connections | Windows 10, Windows 11 (min. res. 1024 x 768) |
| Software/PC requirements | Bit Wave |
| Ambient operating temperature range | -15°C ÷ 55°C (5 °F to 131 °F) |
| Weight | 4.2 kg |
| Dimension A | 330 mm (12.99 in) |
| Dimension B | 300 mm (11.81 in) |
| Dimension C | 200 mm (7.87 in) |
| Dimension D | 170 mm (6.69 in) |
| Dimension E | 55.5 mm |
| Dimension C1 | 220 mm (8.66 in) |
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EVOCA® is Hertz’s proprietary sound optimization technology that enhances loudspeaker behavior in real time. By modeling speaker dynamics, it improves control, clarity, and low-frequency performance while reducing distortion and mechanical stress, delivering a more immersive and reliable listening experience in marine environments.
bit Wave is the advanced Hertz software for configuring and tuning marine DSP systems. It offers intuitive control over signal routing and sound optimization, simplifying complex multi-zone setups while ensuring consistent, high-quality performance across every listening area.
High-resolution processing at 24 bit / 96 kHz with an extended 10–42 kHz bandwidth preserves detail, dynamics, and spatial accuracy, delivering a refined and natural listening experience in marine environments.
A2B digital communication enables multiple units to be connected through a single cable, simplifying installation while maintaining full signal synchronization. Designed for luxury yachts and advanced multi-zone systems, it ensures clean, reliable performance with minimal wiring complexity.
Thanks to the Hertz advanced D-CLASS output stage, HMD8 DSP joins maximum sound quality with unmatched efficiency to be very compact and easily installed in any position of the boat.
Electronics components corrosion caused by exposure in wet environments is totally neutralized by the use of dedicated Marine grade (epoxy coated) PCB boards.
To satisfy the standards required by ASTM-B117, Hertz Marine products are tested with massive salt fog spray to ensure a complete resistance to corrosion, typical of this atmospheric agent.
The protection grade IP64 defines all the Hertz Marine products as totally protected against water jets of different entities, making them highly performant in the marine environment.
