Description

Hertz HMP4D – 600W D-Class 4-Channel Amplifier for Marine and Off-Road Vehicles

The Hertz HMP4D is a robust 4-channel amplifier with an IP64-rated, ultra-compact cast-aluminum chassis, making it highly suited for UTV, ATV, motorcycle, and marine installations. Its efficient power-to-size ratio and flexible crossover system make it easy to set up, with balanced circuitry for superior noise rejection. The amplifier is designed for durability, resisting corrosion and water exposure, which ensures reliable performance in challenging outdoor environments.

Key Features

Weatherproof Design: IP64 rating protects against water jets and corrosion.
Corrosion-Proof Components: Marine-grade, epoxy-coated PCB withstands wet conditions.
High Power in Compact Size: Efficient D-Class circuitry delivers 600W max power.
Flexible Crossover System: Offers full design flexibility with or without external processors.
Balanced Inputs: Reduces interference for clear, high-quality audio.

General Specifications

Channels: Configurable for 4 or 2 channels
Power Supply Voltage / Fuse: 11 – 15 VDC / 1 x 15 A
Idling Current (Power ON/OFF): 1.2 A / 0.04 mA
Max Power Consumption (2Ω, 14.4 VDC): 15 A
Remote In: 4 – 15 VDC – 1 mA
Distortion (THD, 100 Hz @ 4Ω): 0.2%
Frequency Range: 10 Hz – 30 kHz
Signal-to-Noise Ratio: 95 dB
Damping Factor (100 Hz @ 4Ω): 45
Dimensions: 223 x 100.5 x 43.6 mm (8.77 x 3.95 x 1.71 in)
Weight: 1.35 kg (2.97 lb)

Output Power Ratings

RMS Power @ 14.4 VDC, THD 1%:

4 Channels: 50W x 4 (4Ω), 65W x 4 (2Ω)
3 Channels: 50W x 2 + 130W x 1 (4Ω), 65W x 2 + 130W x 1 (2Ω)
2 Channels: 130W x 2 (4Ω)
RMS Power @ 14.4 VDC, THD 10%:

4 Channels: 60W x 4 (4Ω), 75W x 4 (2Ω)
3 Channels: 60W x 2 + 150W x 1 (4Ω), 75W x 2 + 150W x 1 (2Ω)
2 Channels: 150W x 2 (4Ω)

Inputs and Filters

Input Type: PRE IN
Filters:
Front Channel Lo-Pass Filter: 65, 85, 115 Hz @ 12 dB/Oct
Rear Channel Hi-Pass Filter: 65, 85, 115 Hz @ 12 dB/Oct
Rear Channel Lo-Pass Filter: 65, 85, 115 Hz @ 12 dB/Oct