HMP 4D – 4-Channel Amplifier for Marine and Powersports Applications

Thanks to its ultra-compact die-cast aluminum chassis (rated IP64), the HMP 4D amplifier is built to withstand the elements, making it the ideal choice for installation on UTVs, ATVs, and motorcycles.

It delivers an impressive power-to-size ratio and easy integration thanks to its built-in crossover. The front section includes a full, switchable filtering system, allowing great flexibility in system design—with or without an external processor—and compatibility with virtually any audio source.

The inputs feature a balanced input circuit that rejects most electromagnetic interference, eliminating noise for clean, high-quality sound.

🔧 Technical Specifications

• Channel Mode: 4 / 2

• Output Power (RMS) @ 14.4 VDC:
  • 60 W x 4 (4 Ω)
  • 75 W x 4 (2 Ω)
  • 150 W x 2 (4 Ω bridged)

🎚 Built-in Filters

• Bypass: Yes

• Hi-Pass: 65 / 85 / 115 Hz @ 12 dB/Oct.

• Lo-Pass: 65 / 85 / 115 Hz @ 12 dB/Oct.

📊 Audio Performance

• Total Harmonic Distortion (THD, 100 Hz @ 4 Ω): 0.2 %

• Signal-to-Noise Ratio (A-weighted @ 1V): 95 dB

• Damping Factor (100 Hz @ 4 Ω): 45

📏 Dimensions

• Size (W x D x H):
  223 x 100.5 x 43.6 mm
  (8.77 x 3.95 x 1.71 in.)