Diamond Audio 4-Channel Full Range Class D Amplifier

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Vendor : Diamond Audio

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MICRO84U - 4 Channel Full Range Digital Amplifier

Diamond Audio continues to break new dimensions by introducing the MICRO8U series of amplifiers for 2018. Following in the footsteps of the highly popular MICRO series amplifiers, the big-brother MICRO8U series packs more power and performance!

Developed and engineered from the ground up, these new amplifiers not only deliver more power, they are conformal-coated for all-weather application and outdoor environment use. All MICRO8U models have the same platform and dimension size (excluding the MICRO85U & MICRO88U) for a more aesthetically pleasing installation/fabrication set up to match its subtle, yet elegant cosmetics to give it that signature Diamond Audio visage.


  • 165W x 4CH @ 2Ω / 90W x 4CH @ 4Ω / 330W x 2CH @ 4Ω Bridged RMS Power Output
  • Input Sensitivity: 0.2-10 Volt
  • Crossover Filter : 40-400Hz, 12dB Per Octave Slope
  • Frequency Response: 10-33KHz
  • Selectable REM / VOX / DC Turn On Modes
  • Selectable 2CH / 4CH Input Modes
  • Dimensions: 9.1" x 4.1" x 1.46" / 230.5 x 103 x 37.2 mm
  • Disconnected RCA Input & Speaker Output Harness Kits Included


  • Amplifier   4 Channel
  • MAX Power Rating   600 W RMS
  • RMS Power(2Ω)   150 W X 4
  • RMS Power (4Ω)   80 W X 4
  • RMS Bridge (mono 4Ω)   300 W X 2
  • Topology   Full-Range Class D
  • Power Supply   Full PWM
  • Power Supply (Threshold)  10.0VDC – 17.0VDC
  • Idle Current   (0.7A)
  • Distortion - THD (1KHz@4Ω)   0.5%
  • Distortion - S/N Ratio (A weight @ 1W)  -85dBA
  • Distortion - S/N Ratio (A weight @ FP)   -101.1dBA
  • Input Sensitivity Low   200mV – 10V
  • Input Sensitivity High   N/A
  • Input Impedance - Low Input Level    20 KΩ
  • Input Impedance - AUX Input Level   20 KΩ
  • Output Impedance   0.018Ω
  • Damping Factor (50Hz@4Ω)   >70
  • Bandwidth (-3dB)   10Hz-30kHz
  • 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   40A
  • Dimension - Length x Width x Height - Inches(mm)   9.0″ x 4.06″ x 1.52″( 228.6 x 103.124 x 38.608 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