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Hertz 4 Channel Compact Marine and Powersports Amplifier
Hertz 4 Channel Compact Marine and Powersports Amplifier 0
Hertz 4 Channel Compact Marine and Powersports Amplifier 1

Hertz 4 Channel Compact Marine and Powersports Amplifier

Model #: HMP 4D
At a Glance
Thanks to the ultra-compact cast-aluminium chassis (IP64 rated), the HMP 4D amplifier is nature-proof, being the ideal choice for UTV/ATV/motorcycle installations. It features an incredible power/size ratio and an easy setup thanks to the integrated crossover filter.
Available in Store Only
$379.99Save $NaN

Get to know this product.

The Front End section features a complete and bypassable crossover system, providing full system design flexibility with or without external processors, offering the user endless connection possibilities with any source. Inputs feature a special balanced circuitry, ensuring high rejection against electro-magnetic interferences, for noise-free results.

Water Jet Tested

The protection grade IP64 define all the Hertz Marine products as totally protected against water jets of different entities, making them highly performant in the marine environment.

Corrosion Protection

Electronics components corrosion caused by exposure in wet environments is totally neutralized by the use of dedicated marinegrade (epoxy coated) PCB boards.

Salt Fog Tested

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.

  • IP64 Certification
  • Distortion - THD (100Hz @ 4Ω): 0.2 %
  • S/N Ratio (A weighted @ 1V): 95 dB


Channel mode4 - 2
Output Power (RMS) @ 14.4 VDC60 W x 4 (4 Ω), 75 W x 4 (2 Ω), 150 W x 2 (4 Ω)
Hi-Pass Filter65-85-115 Hz @ 12 dB/Oct.
Lo-Pass Filter65-85-115 Hz @ 12 dB/Oct.
Distortion - THD (100Hz @ 4Ω)0.2 %
S/N Ratio (A weighted @ 1V)95 dB
Damping factor (100Hz @ 4Ω)45
Size W x D x H mm (in.)223 x 100.5 x 43.6 / 8.77 x 3.95 x 1.71

Misc. Specs

Depth (in.)3.95
Width (in.)8.77
Height (in.)1.71
Bluetooth CapableNo
Amplifier Channels4
Water ResistantNo
Digital InputNo
Shallow MountNo
Speaker Level InputNo
WarningProposition 65 Warning for California Residents