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Rockford Fosgate - Prime Series - R400-4D - 400 Watt Full Range Class - D 4-Channel Amplifier

This product has been discontinued

Rockford Fosgate - Prime Series - R400-4D - 400 Watt Full Range Class - D 4-Channel Amplifier



  • 400 Watts Full Range Class D 4 Channel Amplifier
  • Frequency Response 20Hz to 20kHz plus/minus1dB
  • 400 Watts RMS power
  • 12dB/octave crossover
  • 2/4 channel switch
  • SUPC: 1555965


Frequency Response 20Hz to 20kHz plus/minus1dB
Rated Power (RMS Continuous Power) 75 Watts x 4 at 4-Ohm, 100 Watts x 4 at 2-Ohm, 200 Watts x 2 at 4-Ohm Bridged
Total Power (Sum of Rated Power) 400 Watts RMS
Bridgeable Yes
Crossover Controls
Front Variable 50Hz - 500Hz at 12dB/Octave
Rear Variable 50Hz - 500Hz at 12dB/Octave
Tone Controls 0dB to plus18dB at 45Hz
Signal Input Low Level 2 RCA Pair
Signal Output Low Level 1 RCA Pair
Power Wire Gauge 4 AWG
Speaker Wire Gauge 12 AWG
Circuit Topology Class Full Range Class-D
Dimensions (H x W x L) 5cm x 17.20cm x 23.10cm


Boost the performance of your car speakers and turn up the volume with the Prime - R400-4D Amplifier. The Prime – R400-4D employs Circuit Topology Class D Architecture that significantly improves efficiency without compromise to the sound quality. 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.

If you want a single amplifier that can run your car’s complete audio system, then the Prime R400-4D is perfect for you. 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. The Prime – R400-4D 4-channel amplifier puts out 75 watts RMS to each of your full-range speakers or components, giving them plenty of juice to rock. You can also use the front channels of the R400-4D for your front speakers while using the rear channels bridged to run a sub with up to 200 watts RMS or you can bridge the amplifier to 2-channel mode to drive a pair of subwoofers.

About the brand:

Rockford Fosgate is an American manufacturer of aftermarket and OEM car audio and In-Car Entertainment (ICE) products and accessories, as well as limited Pro Audio, and personal electronics items. The company markets currently three distinct product lines with the brand's name. Prime is entry level, Punch line is more in line with other enthusiast level products, and Power represents their high end products.

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