Diamond Audio

Diamond Audio HXM800.1D Marine Grade 800 Watt Mono Block Amp

SKU: HXM800.1D
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The Diamond Audio HXM800.1D is a marine grade motorsport amplifier that boasts 800 watts RMS on a single channel. Perfect for your system that needs to push a subwoofer to the max while using minimal space.
  • Ultra-compact, high density aluminum alloy chassis provides superior thermal stability
  • Four layer, glass epoxy circuit board for enhanced performance and reliability
  • Circuit board conformal coated (water resistant) for marine applications
  • Full Range Class D amplifier technology
  • Balanced differential inputs for superior noise rejection
  • Input sensitivity from 200mV to 10V accepts Line (RCA) and Speaker level input
  • Selectable auto-turn-on modes: Signal Sensing (VOX), 12V Remote (REM) and DC offset (DC)
  • Fully variable, 12dB per octave, electronic crossover
  • Variable 18dB per octave sub-sonic filter
  • Phase adjustable from 0 to 180 degrees
  • Adjustable Bass EQ (45Hz: 1dB to +12dB) / remote level control included
  • Built-in BTR Port (MICRO-USB) to connect our optional Bluetooth receiver-controller
  • Top mounted controls for convenient adjustment
  • Integrated soft clip light for quick system set-up
  • Illuminated logo

Download the Diamond Audio HXM800.1D Owners Manual


RMS Power Rating

  • RMS Power (1Ω):   800 W X 1 
  • RMS Power (2Ω):  550 W X 1  
  • RMS Power (4Ω): 350 W X 1 


  • Topology: MonoBlock Class D

Power Supply

  • Power Supply: Full PWM
  • Power Supply Threshold: 10.0VDC-17.0VDC
  • Idle Current: (0.7A)


  • THD (1KHz@4Ω) : 0.05%
  • S/N Ratio (A weighted@1W): -77.2dBA
  • S/N Ratio (A weighted@FP): -98.9dBA

Input Sensitivity

  • Low Input Level: .2mV-10.0V
  • High Input Level: Yes - Up to 25W RMS

Input Impedance

  • Low Input Level: 22 KΩ
  • High Input Level: 22 KΩ

Output Stage

  • Output Impedance: 0.047Ω 
  • Damping Factor (50Hz@4Ω): >250
  • Bandwidth (-3dB): 10Hz-350Hz

Crossover (-12dB per Octave)

  • Variable High-Pass: N/A
  • Variable Low-Pass: 30Hz - 300Hz 
  • Variable Sub-Sonic: 10Hz - 55Hz

Recommended Fuse Rating

  • ATC: N/A


  • Length x Width x Height (Inches): 8.56 x 5.27 x 1.75
  • Length x Width x Height (mm): 297.6 x 133.9 x 44.5

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