R300X4 300 Watt


In stock

Please note in order to achieve the full Rockford Fosgate experience our products are required to be installed by an Authorised Stockists. If you choose not to have the product installed by an RTTI trained dealer, you will also waiver the product warranty.

Product Information

Prime 300 Watt 4-Channel Amplifier

The PRIME R300X4 is a versatile 4-channel amplifier capable of running your entire system. The R300X4 is great for full-range or component speakers on the front channels with subwoofers on the rear running in bridged/mono mode.

  • 12dB/octave Butterworth crossover
  • 0/6/12 dB On Board Punch EQ Control
  • 2/4 channel input switch
  • High Level Input (4-pin)
  • Separate Front and Rear Gain Control
  • Real time output and power supply thermal sensing
  • Cast aluminum heatsink
  • 4 Gauge power/ground connectors
  • MOSFET power supply
  • Over current protection
  • Short circuit protection
  • Muted turn on
  • 1 Year Standard Warranty

Video & Review



CEA-2006 Compliant CEA-2006 Power Rating
50W x 4 @ 4Ω
≤1.0% THD+N
Number of Channels 4
Rated Power
(RMS Continuous Power):
50 Watts x 4 @ 4-Ohm
75 Watts x 4 @ 2-Ohm
150 Watts x 4 @ 4-Ohm Bridged
Total Power
(Sum of Rated Power):
300 Watts RMS
Dynamic Power
76 Watts x 4 @ 4-Ohms 0° Res
100 Watts x 4 @ 2-Ohms 0° Res
Bridgeable Yes
Frequency Response: 20Hz to 20kHz +/-1dB
Efficiency (average): 69% @ 4-Ohm
Total Harmonic Distortion (THD+Noise): 4-Ohm: <1.0%
2-Ohm: <1.0%
Crossover Controls: Front Channels
High-Pass/Low-Pass (HP/LP): 50-250Hz @ 12dB/octave Butterworth
Rear Channels
High-Pass/Low-Pass (HP/LP): 50-250Hz @ 12dB/octave Butterworth
Tone Controls: Front Channels
Punch Bass: 0dB/+6dB/+12dB @ 45HzRear Channels
Punch Bass: 0dB/+6dB/+12dB @ 45HzFunction works when crossover in (LP) position
Input Sensitivity: 150 mV to 4 V
Signal Input: Low Level:2 RCA Pair
Signal Output:
Power Input Connector: Screw terminal
Power Wire Gauge: 4 AWG
Speaker Output Connector: Screw terminal
Speaker Wire Gauge: 8 AWG
Heat Sink Type: Extruded Aluminium
Cooling: Convection
Remote Controls:
Visual Indicators: Power/Protect LED
Circuit Topology Class: Class-A/B
Operating Voltage: 9 – 16 VDC
Recommended Fuse
(not included):
50 A
Max. Current Draw (13.8V Sinewave): 50 A
Average Current Draw (13.8V Music): 25 A
Suggested Alternator: 75 A
Shipping Weight: 7.8 Lbs. (3.53 Kg.)
Dimensions (H x W x D): 1.97″ x 6.77″ x 13.19″
(5cm x 17.20cm x 33.5cm)

Product Manuals