


ROCKFORD FOSGATE
ROCKFORD FOSGATE Prime Marine 400 Watt Class-D 4-Chanel Amplifier
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 a 400 Watt 4-channel high efficiency Class-D amplifier 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.
- 2 Year Warranty
Number of Channels
4
Bridgeable
Yes
Signal Input
Low Level: 2 RCA Pair
Power Input Connector
Block
Power Wire Gauge
4 AWG
Speaker Output Connector
Block
Speaker Wire Gauge
12 AWG
Cooling
Convection
Circuit Topology Class
Full-Range Class D
Frequency Response
20Hz to 20kHz +/-1dB
Dynamic Power
(PVC/PowerCube®)
(PVC/PowerCube®)
79 Watts x 4 @ 4-Ohm
138 Watts x 4 @ 2-Ohm
255 Watts x 2 @ 4-Ohm Bridged
138 Watts x 4 @ 2-Ohm
255 Watts x 2 @ 4-Ohm Bridged
Dimensional Diagram
Rated Power
(RMS Continuous Power)
(RMS Continuous Power)
75 Watts x 4 @ 4-Ohm
100 Watts x 4 @ 2-Ohm
200 Watts x 2 @ 4-Ohm Bridged
100 Watts x 4 @ 2-Ohm
200 Watts x 2 @ 4-Ohm Bridged
Crossover Controls
Front Channels: Variable 50Hz - 500Hz @ 12dB/octave
Rear Channels: Variable 50Hz - 500Hz @ 12dB/octave
Rear Channels: Variable 50Hz - 500Hz @ 12dB/octave
Tone Controls
0dB to +18dB @ 45Hz
Signal Output
Low Level: 1 RCA Pair
Heat Sink Type
Cast Aluminum
Remote Controls
n/a
Visual Indicators
Power
Protect
Protect
Dimensions (H x W x D)
1.97" x 6.77" x 9.10"
(5cm x 17.20cm x 23.10cm)
(5cm x 17.20cm x 23.10cm)
Shipping Weight
5.863 Lbs.
(2.65 Kg.)
(2.65 Kg.)
Efficiency (average)
80% @ 4-Ohm
75% @ 2-Ohm
75% @ 2-Ohm
CEA-2006 Compliant

75W x 4 @ 4Ω
≤1.0% THD+N
Total Power
(Sum of Rated Power)
(Sum of Rated Power)
400 Watts RMS