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Rockford Fosgate M400-4D, M600-4D, M750-1D, M1200-1D Marine Amplifiers


Rockford Fosgate announced four new marine-grade amplifiers. The M400-4D and M600-4D 4-channel amps have been designed to power Rockford Fosgate’s M2 full-range speakers, while the M750-1D and M1200-1D mono-block amps can power either single or multi-subwoofer systems.

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.

“Based on Rockford Fosgate’s Full Range Class D amplifier platform, the highly efficient Marine Series Class D amplifiers have been designed and built to withstand the rigors of harsh nautical climates and conditions,” explained Jake Braaten, Rockford director of product development. “There are no worries when taking Rockford’s acclaimed power out on the water as these systems include a marinized circuit board, and all hardware is chrome-plated to resist corrosion.”

Rockford Fosgate M600-4D Marine Amplifier

Model Channel 4 Ohm 2 Ohm 1 Ohm Frequency Response MAP
M400-4D stereo
75 x 4
200 x 2
100 x 4
N/A 20Hz – 20kHz +/- 1dB $299.99
M600-4D stereo
100 x 4
300 X 2
150 x 4
N/A 20Hz – 20kHz +/- 1dB $449.99
M750-1D mono 250 x 1 500 x 1 750 x 1 20Hz – 250Hz +/-1dB $399.99
M1200-1D mono 400 x 1 800 x 1 1200 x 1 20Hz – 250Hz +/-1dB $499.99

Additional specs for the M400-4D, M600-4D, M750-1D, and M12001D include:

  • 12dB/octave Butterworth crossovers
  • 2/4 channel switch (M400-4D, M600-4D)
  • RCA pass-thru (M750-1D, M12001D)
  • 12dB/octave Infrasonic filter (M750-1D, M12001D)
  • 4 Gauge power/ground terminals
  • Cast aluminum heatsink
  • Top mounted controls
  • Class D circuit topology
  • Short circuit protection
  • MOSFET power supply
  • CEA-2006 compliant
  • CE compliant

Rockford Fosgate M750-1D Marine Amplifier

Rockford Fosgate M1200-1D Marine Amplifier

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