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Rockford Fosgate

Rockford Fosgate Prime 400 Watt Full-Range Class-D 4-Channel Amplifier - M400-4D

Abt Model: M4004D | UPC Code: 780687340803
 Discontinued Product This item is no longer available from our website.
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Rockford Fosgate - M400-4D - Marine Amplifiers
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12 dB/Octave Crossover/ 4 Channel Amplifier/ 4 Gauge Power/Ground Terminals/ Cast Aluminum Heatsink/ Bridgeable/ 400 Watts RMS Total Power/ 20Hz To 20kHz Frequency Response/ Convection Cooling/ On-Board Punch EQ/ Conformal Coated PCB And UV Resistant Finish/ White Finish
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Product Details

Rockford Fosgate Prime 400 Watt Full-Range Class-D 4-Channel Amplifier, Model M4004D

The Prime M400-4D amplifier is a 400 Watt 4-channel high efficiency Class-D amplifier specifically designed for Marine and Powersport applications. The amplifier printed circuit board is conformal coated with a UV resistant finish that conforms to industry standard UV and Salt-Fog specifications, and the Class-D circuit topology is so efficient, it consumes much less current from your charging system over traditional Class-A/B amplifiers.


  • 12dB/octave Butterworth crossover
  • 2/4 channel switch
  • 4 Gauge power/ground connectors
  • Cast aluminum heatsink
  • Top mounted controls
  • Conformal coated PCB and UV resistant finish for UV & Salt-Fog protection.
  • On-board Punch EQ with +18dB boost @ 45Hz.
  • Tri-stage protection covers thermal, over-current and short circuits.


  • Number of Channels 4
  • Rated Power (RMS Continuous Power)
    • 75 Watts x 4 @ 4-Ohm 
    • 100 Watts x 4 @ 2-Ohm 
    • 200 Watts x 2 @ 4-Ohm Bridged
  • Total Power (Sum of Rated Power) 400 Watts RMS
  • Bridgeable Yes
  • Efficiency (average)
    • 80% @ 4-Ohm 
    • 75% @ 2-Ohm
  • Crossover Controls
    • Front Channels: Variable 50Hz - 500Hz @ 12dB/octave 
    • Rear Channels: Variable 50Hz - 500Hz @ 12dB/octave
  • Tone Controls 0dB to +18dB @ 45Hz
  • Signal Input Low Level: 2 RCA Pair
  • Signal Output Low Level: 1 RCA Pair
  • Power Input Connector Block
  • Power Wire Gauge 4 AWG
  • Speaker Output Connector Block
  • Speaker Wire Gauge 12 AWG
  • Heat Sink Type Cast Aluminum
  • Cooling Convection
  • Visual Indicators Power, Protect
  • Circuit Topology Class Full Range Class-D
  • Frequency Response 20Hz to 20kHz +/-1dB

Approximate Dimensions:

  • Height: 1.97"
  • Width: 6.77"
  • Depth: 9.10"

Approximate Weight

  • Shipping: 5.863 lbs

Warranty Information:

  • Manufacturer Warranty (authorized online retailer): One Year Limited Parts And Labor
  • Extended Service Warranty Available: Click the warranty tab above for details
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More reasons to buy the Rockford Fosgate M400-4D from Abt Electronics
  • is an authorized dealer (Learn More).
  • The Rockford Fosgate M400-4D is Brand New.
  • The Rockford Fosgate M400-4D Ships in a Factory Sealed Box.
  • Abt ships this product for free!
Rockford Fosgate Prime 400 Watt Full-Range Class-D 4-Channel Amplifier

Rockford Fosgate Prime 400 Watt Full-Range Class-D 4-Channel Amplifier


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