HMP 4D

Marine-Grade Power and Performance

The Hertz HMP-4D amplifier delivers clean, powerful sound in any marine or powersports environment. With 65 watts RMS per channel at 2 ohms, this compact Class D amplifier provides dynamic, distortion-free audio for boats, ATVs, motorcycles, and UTVs. Designed for high efficiency and superior output, it ensures consistent performance even in demanding outdoor conditions.

Built to Withstand the Elements

Engineered with an IP64-rated weather-resistant design, the HMP-4D is fully protected against water spray, dust, and UV exposure. Its corrosion-resistant aluminum chassis, sealed connectors, and conformal-coated circuit board provide long-lasting durability in marine and off-road applications. Whether on the lake or the trail, it’s built to deliver reliable power wherever your adventure takes you.

Flexible Configuration and Compact Design

The HMP-4D offers versatile installation options with bridgeable channels and selectable crossovers, making it suitable for driving speakers, towers, or subwoofers. Its compact footprint and efficient Class D topology allow easy placement in tight spaces without compromising performance. With full-range, high-pass, and low-pass filters, it provides precise sound tuning for any setup.

Highlights:

• Class D 4-channel marine & powersports amplifier

• Power output: 65W RMS x 4 @ 2Ω / 40W RMS x 4 @ 4Ω

• Bridgeable: 130W RMS x 2 @ 4Ω

• IP64-rated for water and dust resistance

• Conformal-coated PCB for moisture protection

• Corrosion-resistant aluminum heat sink and hardware

• High/low-pass filters and full-range selectable operation

• Compact, lightweight design for easy installation

• Frequency response: 10Hz – 35kHz

• Total harmonic distortion (THD): <0.1%

• Signal-to-noise ratio: >100 dB

• Ideal for boats, ATVs, UTVs, and motorcycles

Package Contains:

• (1) Hertz HMP-4D Marine & Powersports 4-Channel Amplifier

• (1) Power and speaker connector kit

• (1) Mounting hardware set

• (1) User manual and installation instructions

• (1) Hertz warranty information card