About: Hertz HMD8DSP Marine 8-Channel Amplifier with DSP

The HMD8 DSP, powered by Hertz Marine DSP technology, rich new highs of listening pleasure during navigation. DSP user friendly PC-Software interface make the setup process a breeze, exploiting every single pills of performance from the installed speaker system. The amazing power of 8 * 85 W or 4 * 260 W (RMS@ 4Ω) gives the HMD 8DSP the capability to drive with authority the complete speaker system generating tons of crystal clear SPL up to 3 different zone of the vessel. "Power for the Waves” design philosophy features a sturdy enclosure made of extruded aluminum with an anti-corrosion treated PCB to ensure years of listening pleasure in open water.

General Specifications

• 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)

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

Audio Specifications

• 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