Rockford Fosgate R2300X4 Prime Amp 40W x 4 at 4 Ohms 150W x 2 at 4 Ohms Bridged

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Prime 300 Watt 4-Channel Amplifier


Primed for Performance, the R2-300X4 amplifier is a 300 watt, full-range class-D, capable of operating at 4Ω or 2Ω stereo, and 4Ω bridged/mono. This amplifier is extremely efficient because of its class D technology which reduces demand on the vehicles electrical system. The amp also features C.L.E.A.N. circuitry to help you adjust your gain settings, a P.O.W.E.R. Supply that generates more power as voltage increases, and integrated Punch EQ that corrects for acoustic deficiencies while delivering up to 3X the bass.


The Prime Series were developed for car audio fanatics that want a reliable amplifier – with all the power and performance you’ve come to expect from Rockford Fosgate – at an economical price. Rockford Fosgate amplifiers are renowned world-wide for being “under rated,” easily surpassing all specifications, and most importantly, generating more power than their ratings. The latest generation of Prime Series amplifiers are also designed to be easy to setup and configure, making them perfect for use with factory audio or custom aftermarket systems.


Balanced Differential Inputs with RCA Pass Through Outputs

High Level Input Capable

Defeat able Auto Turn On Circuit

Features C.L.E.A.N. Set-up

2/4 Channel Input Selection Switch

Front and Rear Variable Input Gain adjustment level

Continuously Variable On Board Punch EQ

Top Mounted Control Panel

Short Circuit & Over Current Protection

CEA-2006 Compliant & CE Compliant

Cast aluminum heat sink

Full Range Class D

Fully Adjustable 12 dB/octave High and Low pass Butterworth Crossovers

1 Year Warranty


CEA-2006 CompliantCEA-2006 GuidelinesCEA-2006 Power Rating

50W x 4 @ 4Ω

≤1.0% THD+N

Number of Channels4

Total Power

(Sum of Rated Power)300 Watts

Rated Power

(RMS Continuous Power)50 Watts x 4 @ 4Ω

75 Watts x 4 @ 2Ω

150 Watts x 2 @ 4Ω Bridged/Mono

Dynamic Power

(PVC/PowerCube®)70 Watts x 4 @ 4Ω

115 Watts x 4 @ 2Ω

230 Watts x 2 @ 4Ω Bridged/Mono


Frequency Response20 Hz - 20 kHz

Input SensitivityLow-Level: 150 mV - 4 V

High-Level: 450 mV - 12 V

Circuit Topology ClassClass D

Efficiency (average)

Total Harmonic Distortion (THD+Noise)4Ω: <1.0%

2Ω: <1.0%

Signal InputFront Low-Level: 4 RCA

Front High-Level: 4-Pin Molex

Rear Low-Level: 4 RCA

Rear High-Level: 4-Pin Molex

Signal OutputLow-Level: 2 RCA

Tone ControlsNo

Crossover ControlsFront High-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth

Front Low-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth

Rear High-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth

Rear Low-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth

All-Pass: Yes

Remote ControlsNo

Visual IndicatorsPower/Protect

C.L.E.A.N. In

C.L.E.A.N. Out (front)

C.L.E.A.N. Out (rear)

Power Wire Gauge4 AWG

Power Input ConnectorCompression Terminal Block

Speaker Wire Gauge8 AWG

Speaker Output ConnectorCompression Terminal Block



Operating Voltage9 - 16 VDC

Recommended Fuse

(not included)60 A

Average Current Draw (13.8V Music)

Max. Current Draw (13.8V Sinewave)39 A

Suggested Alternator

Dimensional Diagram

Dimensions (H x W x D)1.9" x 6.8" x 10.1"

(4.9 cm x 17.3 cm x 25.5 cm)

Extra Information

Rockford Fosgate