Description
Hertz marine dsp technology allows you to move freely in the boat preserving a perfect surround effect, even with outdoor listening.
Hertz Marine DSP optimizes acoustic performance for each of the 3 configurable listening zones, regardless of where the speakers are installed and the point of the passenger within the zone, maximizing listening pleasure while cruising.
Filter Type
Full / High pass / Low pass / Band pass
Filter model and slope
Butterworth, Linkwitz-Riley, Bessel, Chebyshev, QLP quasi-linear phase
0 – 510 cm (0 – 200.8 inches)
n. 10 parametric poles (Peaking, High Shelf, Low Shelf,
Notch, All pass) ±12 dB gain, variable Q (0.5 – 16.0)
n. 10 graphic poles
Hertz Navigator software allow to create pre-optimized software setup files for a specific boat model and the related audio system installed, ensuring a correct acoustic result in a very short time.
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.
Input/Output
General Specifications
| POWER SUPPLY | |
| Operating power supply voltage | 11 ÷ 15 VDC / 2 x 30A |
| Power supply | 6.5V ÷ 17V |
| Idling current | 1.6 A |
| Switched off | 1.7mA |
| Consumption @ 14.4 VDC, 2Ω, Max Musical Power | 55 A |
| Remote IN voltage | 6 ÷ 15 VDC (1 mA) |
| Remote OUT voltage | 4 ÷ 15 VDC (150 mA) |
Audio Specifications
| AMPLIFIER STAGE | |
| Distortion – THD @ 1 kHz, 4Ω, 70% Rated Power | 0.06% |
| Damping factor @ 1 kHz, 4Ω, 2 VRMS | > 110 |
| Bandwidth @ -1.5 dB | 10Hz ÷ 22kHz |
| S/N ratio (A weighted @ 1 V Input) Master Input | 100 dBA |
| S/N 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 | 8Ch: 2Ω |
| 4Ch – (Bridge 1/2; 3/4; 5/6; 7/8) : 4Ω | |
| OUTPUT POWER (RMS) @28.8 VDC, 1% THD: | |
| 8Ch @ 4Ω | 85 W x 8 |
| 8Ch @ 2Ω | 130 W x 8 |
| 4Ch (Bridge 1/2; 3/4; 5/6; 7/8) @ 4Ω | 260 W x 4 |
Digital Signal Processor
| 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, All pass) ±12 dB gain, variable Q (0.5 – 16.0) n. 10 graphic poles |
| Time alignment distance | 0 – 510 cm (0 – 200.8 inches) |
| Time alignment delay | 0 – 15 ms |
| Time alignment step | 1 cm |
| Time alignment fine set 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 |
Physical Specs
| Max size W x H x D (mm/inch) | 238 x 49,5 x 155 / 9.37 x 1.95 x 6.1 |
| Weight (kg/lbs) | 1,98 / 4.36 |
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