


ROCKFORD FOSGATE
ROCKFORD FOSGATE Prime 400 Watt Class-D 4-Channel Amplifier
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
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
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
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
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.
Learn moreP.O.W.E.R.
Power supply and output design that allows the amplifier to increase power output as voltage increases.

Class D
High efficiency amplifier design that reduces current consumption from the charging system.
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75W x 4 @ 4Ω
≤1.0% THD+N
(Sum of Rated Power)
(RMS Continuous Power)
100 Watts x 4 @ 2-Ohm
200 Watts x 2 @ 4-Ohm Bridged
(PVC/PowerCube®)
145 Watts x 4 @ 2-Ohms 0° Res
75% @ 2-Ohm
2-Ohm: <1.0%
Rear: Variable 50Hz - 500Hz @ 12dB/Octave
Protect
(not included)

(5cm x 17.20cm x 23.10cm)