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ROCKFORD FOSGATE Prime marine amp, 400 watt 4 channel

Item: M400-4D
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Rockford Fosgate M400-4D Prime Marine Audio Amplifier

400 Watt Full-Range Class-D 4-Chanel Amplifier

Rockford Fosgate Marine Amplifiers are designed to weather the toughest environments while keeping the boat rockin'.Rockford Fosgate marine amps conform to protection standards, so they will continue delivering power needed for a fun day on the water.

The M400-4D is a 400 Watt 4-channel high efficiency Class-D marine amplifier featuring a Marine grade PC Board, on-board Punch EQ, variable crossover and tri-state protection circuits.

The Prime M400-4D amplifier is specifically designed for Marine and Powersport applications. The amplifier features a Marine grade PC Board, 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 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.
  • 1 Year Standard Warranty


Item number: M400-4D
UPC: 780687340803
Package weight: 5.7 lb

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