1-Channel Full Range Class D Sub Amplifier

No review yet. Write Review
Regular price
Regular price
Sale price

Vendor : Diamond Audio

Hurry! Only
units left in stock!
Guaranteed with effortless returns
We ship to the contiguous 48 United States
Your security is our priority
PayPal, Venmo & all major Credit Cards

MICRO81U - 1-Channel Full Range Class D Sub Amplifier

  • Full Range Class D IR Chipset
  • DirectFET Power Mosfet Output Stage
  • SMD Technology on 4 layer Glass PC Board
  • Conformal Coated PCB assembly for added water resistance
  • ICAD circuit provides superior overload protection
  • Frequency response 10 Hz – 30kHz (Mono Block 10 Hz – 350Hz)
  • Variable 12db crossovers
  • MICRO Bass boost +12DB @45HZ
  • Premium 8 gauge power connections
  • Multi channels / Mono channel
  • Remote Bass Knob (Included with MICRO81U/MICRO82U)
MAX Power Rating 500 W RMS
RMS Power(2Ω) 300 W X 1
RMS Power (4Ω) 175 W X 1
RMS Bridge (mono 2Ω) 300 W X 1
RMS Bridge (mono 4Ω) 175 W X 1
Input Sensitivity Low 200mV – 10V
Input Sensitivity High N/A
Power Supply Full PWM
Idle Current (0.7A)
Output Impedance 0.011Ω
Damping Factor (50Hz@4Ω) >250
Bandwidth (-3dB) 10Hz-350Hz
FUSE Ratings - ATC 25A
Dimension - Length x Width x Height - Inches(mm) 9.0″ x 4.06″ x 1.52″ (228.6 x 103 x 38.6 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