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ROCKFORD FOSGATE

ROCKFORD FOSGATE Prime 400 Watt Class-D 4-Channel Amplifier

$279.99 USD
R400-4D

The PRIME R400-4D is an ultra-efficient 4-channel amplifier producing 100 Watts into four channels at 2-Ohms. Run a 4-way full-range system or use it with components on the front channels with subwoofers on the rear.

The Prime R400-4D amplifier offers high efficiency through the implementation of its Class-D circuitry while being able to power a full-range system. This amplifier is optimized for 4-channel front/rear systems so you can run midrange/tweeters in the front doors/dash while running midrange/tweeters in the rear doors/deck. Match with a mono amplifier for subwoofers and you'll have a Rockford Fosgate system that any Car Audio Fanatic will envy.

 

  • RCA pass-thru outputs
  • 12dB/octave Butterworth crossover
  • Tri-stage protection covers thermal, over-current and short circuits.
  • On-board Punch EQ with +18dB boost @ 45Hz
  • 2/4 channel input switch
  • 4 Gauge power/ground connectors
  • Cast aluminum heatsink
  • Top mounted controls
  • 1 Year Warranty
Full-Range Class D
Full-Range Class D

A full-range version of the Class D topology which is a high efficiency amplifier design that ...

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Full-Range Class D
Full-Range Class D

A full-range version of the Class D topology which is a high efficiency amplifier design that reduces current consumption from the charging system.

CEA-2006 Compliant
CEA-2006 Compliant

Power ratings on Rockford Fosgate amplifiers conform to CEA-2006 industry standards. These guidelines mean your amplifier's ...

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CEA-2006 Compliant
CEA-2006 Compliant

Power ratings on Rockford Fosgate amplifiers conform to CEA-2006 industry standards. These guidelines mean your amplifier's output power ratings are REAL POWER numbers, not inflated marketing ratings.

P.O.W.E.R.

Power supply and output design that allows the amplifier to increase power output as voltage increases.

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P.O.W.E.R.

Power supply and output design that allows the amplifier to increase power output as voltage increases.

Class D
Class D

High efficiency amplifier design that reduces current consumption from the charging system.

Learn more
CEA-2006 Compliant
CEA-2006 Power Rating
75W x 4 @ 4Ω
≤1.0% THD+N
Number of Channels
4
Total Power 
(Sum of Rated Power)
400 Watts RMS
Rated Power 
(RMS Continuous Power)
75 Watts x 4 @ 4-Ohm 
100 Watts x 4 @ 2-Ohm 
200 Watts x 2 @ 4-Ohm Bridged
Dynamic Power 
(PVC/PowerCube®)
80 Watts x 4 @ 4-Ohms 0° Res 
145 Watts x 4 @ 2-Ohms 0° Res
Bridgeable
Yes
Frequency Response
20Hz to 20kHz +/-1dB
Input Sensitivity
150 mV to 4 V
Circuit Topology Class
Full-Range Class D
Efficiency (average)
80% @ 4-Ohm 
75% @ 2-Ohm
Total Harmonic Distortion (THD+Noise)
4-Ohm: <1.0% 
2-Ohm: <1.0%
Signal Input
Low Level: 2 RCA Pair
Signal Output
Low Level: 1 RCA Pair
Tone Controls
0dB to +18dB @ 45Hz
Crossover Controls
Front: Variable 50Hz - 500Hz @ 12dB/Octave 
Rear: Variable 50Hz - 500Hz @ 12dB/Octave
Remote Controls
-
Visual Indicators
Power 
Protect
Power Wire Gauge
4 AWG
Power Input Connector
Block
Speaker Wire Gauge
12 AWG
Speaker Output Connector
Block
Cooling
Convection
Heatsink
Operating Voltage
9 - 16 VDC
Recommended Fuse 
(not included)
50 A
Average Current Draw (13.8V Music)
25 A
Max. Current Draw (13.8V Sinewave)
50 A
Suggested Alternator
75 A
Dimensional Diagram
Dimensions (H x W x D)
1.97" x 6.77" x 9.10" 
(5cm x 17.20cm x 23.10cm)
Shipping Weight
5.863 Lbs. (2.65 Kg.)