Diamond Audio HXM 4-Channel Full Range Class D Amplifier

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Vendor : Diamond Audio

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HXM800.4D - HXM 4-Channel Full Range Class D Amplifier

MOTORSPORT series amplifiers not only deliver exceptional sound quality but are constructed to withstand the outdoor elements. Engineered with superior full-range Class D Digital Technology, MOTORSPORT series amplifiers generate BIG RMS Power in a very small footprint.

Look to MOTORSPORT amplifiers to bring the Diamond Audio listening experience to your boat, UTV, motorcycle or any mobile audio application that demands the quality, precision and performance built into our water-resistant MOTORSPORT amplifiers.

Conformal coated multi-layer circuit boards for marine applications - Balanced differential inputs for noise-free operation regardless of the source - Full-range digital Class D technology with DirectFET power MOSFET output stage - 12dB per octave adjustable crossovers and phase control for system tuning - Top mounted controls for convenient adjustment - Selectable 3 option Auto Turn-On Mode circuit designed to work with ANY OEM headunit, simplifies installation.


  • 125 W x 4 @ 4Ω
  • 200 W x 4 @ 2Ω
  • 400 W x 2 @ 4Ω bridged
  • S/N: ≤ 97 dBA / THD: .07%
  • Dimensions: 9.3 x 5.28 x 1.75 inches / 237 x 134 x 45 mm


  • Amplifier  4 Channel
  • RMS Power(2Ω)   200W X 4
  • RMS Power (4Ω)  120W X 4
  • RMS Bridge (mono 4Ω)   400W X 2 (4Ω ONLY)
  • Topology   Full-Range Class D
  • Power Supply   Full PWM
  • Power Supply (Threshold)   10.0VDC – 17.0VDC
  • Idle Current   (0.7A)
  • Distortion - THD (1KHz@4Ω)   < 0.07%
  • Distortion - S/N Ratio (A weight @ 1W)   -77.4dBA
  • Distortion - S/N Ratio (A weight @ FP)    -97.4dBA
  • Input Sensitivity Low   0.2mV – 10.0V
  • Input Sensitivity High   YES- UP to 25 W RMS
  • Input Impedance - Low Input Level   22 KΩ
  • Output Impedance   0.047Ω
  • Damping Factor (50Hz@4Ω)   >250
  • Bandwidth (-3dB)   10Hz-35KHz
  • Crossover (-12 dB/ Oct) Variable High-Pass   40Hz-400Hz
  • Crossover (-12 dB/ Oct) Variable Low-Pass    40Hz-400Hz
  • Crossover (-12 dB/ Oct) Variable Sub-Sonic   N/A
  • FUSE Ratings - ATC   N/A
  • Dimension - Length x Width x Height - Inches(mm)   9.3" x 5.27" x 1.75" (237 x 133.9 x 44.5 mm)


Shipping charges for Ratchet's Den are as follows::

$0.00–$25.00 =  $4.95 USD

$25.00–$75.00 =  $9.95 USD

$75.00–$100.00 =  $14.99 USD

$101.00 and up =  $19.99 USD


Returning Goods

You are responsible for the cost and risk of returning item to us. You should send items to the following address:

13978 SW 139th Ct Miami Florida, 33186 USA

We cannot be held responsible for Goods damaged or lost in return shipment. Therefore, We recommend an insured and trackable mail service. We are unable to issue a refund without actual receipt of the Goods or proof of received return delivery.

Contact Us

If you have any questions about shipping and/or returns, please contact us:

  • By email: info@ratchetsden.com