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Rockford Fosgate M400-4D 4-Channel Amplifier

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  • Rockford Fosgate M400-4D 4-Channel Amplifier
  • Rockford Fosgate M400-4D 4-Channel Amplifier

List Price: $499.00 On Sale: $368.85 (GST Included) (You save 26.08%)

SKU: M4004D

$9.95 Flat Rate Generally ships out in 24 to 48 hours.


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Product Info

Product Info

Check out the Rockford Fosgate M400-4D Class D 4-Channel Amplifier's Key Features
(Rockford Fosgate M4004D)

  • 12 Month Australian Warranty
  • Risk Free Purchase Guarantee (bottom of page)
  • Prime Marine 400 Watt Full-Range Class-D 4-Chanel Amplifier
  • 12dB/octave Butterworth crossover
  • 2/4 channel input switch
  • 4 Gauge power/ground connectors
  • Cast aluminum heatsink
  • Top mounted controls
  • Marine grade 2-part epoxy coated PCB
  • On-board Punch EQ with +18dB boost @ 45Hz.
  • Tri-stage protection covers thermal, over-current and short circuits.
  • 75 Watts x 4 @ 4-Ohm
  • 100 Watts x 4 @ 2-Ohm
  • 200 Watts x 2 @ 4-Ohm Bridged400 Watts RMS
  • 400 Watts RMS Total Power


The Rockford Fosgate PRIME series of amplifiers deliveries Rockford Fosgate's technologies at a price point that make similar comparable amplifier brands seem expensive. The Rockford Fosgate PRIME amplifiers are 4 ohm capable and feature on-board Punch EQ, variable crossover and tri-state protection circuits. All Rockford Fosgate amplifiers are CEA 2006 compliant meaning the rated power of the amplifier is certified true and accurate,many other amplifiers quote extreme peak power output but when tested, if they dare, never live up to their ratings. Rockford Fosgate PRIME amplifiers deliver true reliable power to your speakers and subwoofers.

This amplifier is a 4 Channel amplifier rated at 400 watts RMS (total) designed for running front and rear channels. The M400-4D Rockford Fosgate amplifier is also 'Element ready' which means it's protected against Dust, UV, Corrosion, and feature Stainless hardware. Finally, The Class-D circuit topology is so efficient, it consumes much less current from your charging system over traditional Class-A/B amplifiers.

Rockford Fosgate - The Company

In 1973, in a garage, Jim Fosgate created his first car amplifier and the Rockford Fosgate brand was born. Since then Rockford Fosgate has been at the forefront of the car audio industry creating some of the loudest and toughest car speakers and car amplifiers money can buy without sacrificing sound or build quality.

Peace of Mind Purchase Guarantee & Declaration of Warranty
This product is directly imported and is offered with a full Australian 12 month warranty. (You may also be entitled to other consumer warranties as provided by the Australian Consumer Guarantee and these entitlements are not limited by this warranty). In the event that this product should fail please contact our service department to arrange service for this product.

We are not linked or associated with Rockford Fosgate.

This product will be shipped from our Sydney Warehouse and you are welcome to pick it up directly from our store in Sydney. This product is NOT DROP SHIPPED from overseas.

Due to differing operating costs associated with selling products via different marketplaces such as eBay, Amazon or our Online Store, our pricing may vary as a result.

Tech Specs

Technical Specifications

CEA-2006 Compliant:
CEA-2006 Power Rating
75W x 4 @ 4Ω
≤1.0% THD+N

Number of Channels:

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

Dynamic Power
79 Watts x 4 @ 4-Ohm
138 Watts x 4 @ 2-Ohm
255 Watts x 2 @ 4-Ohm Bridged


Frequency Response:
20Hz to 20kHz +/-1dB

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:

Power Wire Gauge:

Speaker Output Connector:

Speaker Wire Gauge:
12 AWG

Heat Sink Type:
Cast Aluminium


Remote Controls:

Visual Indicators:

Circuit Topology Class:
Full Range Class-D

Shipping Weight:
5.863 Lbs.
(2.65 Kg.)

Dimensions (H x W x D):
1.97" x 6.77" x 9.10"
(5cm x 17.20cm x 23.10cm)


In The Box

What's Included?

  • Rockford Fosgate M400-4D 4-Channel Amplifier

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