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The Rockford Fosgate Prime 300 Watt 4-Channel Amplifier is widely praised for solid build quality, clean sound, and the ability to drive door speakers and component sets with ease. Reviewers note easy installation and handy features like top-mounted gain controls and a max-gain indicator.
Buyer confidence
89%Highlights
- Full Range Class-D
- 1 Year Warranty
- CEA-2006 Compliant & CE Compliant
- Cast aluminum heat sink
Key specs
Full specs- Number of Channels
- 4
- 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
- Bridgeable
- Yes
- Frequency Response
- 20 Hz - 20 kHz
- Input Sensitivity
- Low-Level: 150 mV - 4 V High-Level: 450 mV - 12 V
- Circuit Topology Class
- Class-D
Key specs
Full specs- Number of Channels
- 4
- 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
Highlights
Overview- Full Range Class-D
- 1 Year Warranty
- CEA-2006 Compliant & CE Compliant
Review highlights
Based on customer reviewsPowerful, clean 4-channel amp with straightforward setup
The Rockford Fosgate Prime 300 Watt 4-Channel Amplifier is widely praised for solid build quality, clean sound, and the ability to drive door speakers and component sets with ease. Reviewers note easy installation and handy features like top-mounted gain controls and a max-gain indicator.
What buyers praise
- Clean, powerful sound that drives door speakers and component sets
- Solid build quality and well-made construction
What to watch for
- Some users reported the amp cutting out when driven very loud or bridged—confirm compatibility with your speakers and head unit
Overview
The R2-300X4 is a 300 watt, full-range Class-D 4-channel amplifier from Rockford Fosgate's Prime series. It combines Class-D efficiency with C.L.E.A.N. circuitry and a P.O.W.E.R. supply to deliver reliable, easy-to-configure performance for factory or aftermarket car audio systems.
Best for
- Drivers who want an efficient, compact 4-channel amp for full-range speakers
- Systems requiring flexible impedance options (2Ω/4Ω stereo or 4Ω bridged/mono)
- Budget-conscious buyers seeking Prime-series performance and straightforward setup
- Upgrading factory audio or powering custom aftermarket speaker configurations
Key points
- 300 watt full-range output (Class-D)
- Operates at 4Ω or 2Ω stereo; bridged/mono at 4Ω
- Class-D design improves efficiency and reduces demand on vehicle electrical systems
- C.L.E.A.N. circuitry for simplified gain adjustment
- P.O.W.E.R. supply increases available power as vehicle voltage rises
- CTA-2006 compliant
Fit and use
Use the R2-300X4 as a 4-channel amplifier for front/rear speaker setups or bridge channels to mono for higher-output applications where a single bridged channel is needed. Confirm speaker impedance and system needs before configuring stereo or bridged operation. The Prime series design supports straightforward integration with factory audio or aftermarket head units.
What to know
This amplifier emphasizes efficiency and easy setup: Class-D topology reduces electrical load, C.L.E.A.N. circuitry aids gain calibration, and the P.O.W.E.R. supply improves output as voltage permits. It’s part of Rockford Fosgate’s third-generation Prime series, intended for reliable performance at an economical pric…
Highlights
Key features
- Full Range Class-D
- 1 Year Warranty
- CEA-2006 Compliant & CE Compliant
- Cast aluminum heat sink
- Features C.L.E.A.N. Set-up
- Balanced Differential Inputs with RCA Pass Through Outputs
- Front and Rear Variable Input Gain adjustment level
- Auto-Sense bypass switch for vehicles with RAP (Retained Accessory Power)
- Top Mounted Control Panel
- Short Circuit & Over Current Protection
- Fully Adjustable 12 dB/octave High and Low pass Butterworth Crossovers
- 2/4 Channel Input Selection Switch
More info
Manufacturer details
Primed for Performance, the R2-300X4 is a 300 watt, full-range Class-D amplifier 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.
Additional details
The R2 models are 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. These 3rd generation of Prime Series amplifiers are refined with the latest Rockford Fosgate technology for easy setup and configuration, making them perfect for use with factory audio or custom aftermarket systems.
Technologies
CTA-2006 Compliant
Power ratings on Rockford Fosgate amplifiers conform to CTA-2006 industry standards. These guidelines mean your
Full Range Class-D
A full-range version of the Class-D topology which is a high efficiency amplifier design that reduces current
P.O.W.E.R.
Power supply circuit design that allows the amplifier to increase output power as voltage increases.
Patent: 8,712,066
C.L.E.A.N. Technology
Time and sophisticated test equipment have been replaced, with Rockford’s integrated level setting technology
MEHSA 4 (Maximum Efficiency Heat Sink Application)
MEHSA4 (Maximum Efficiency Heat Sink Application - gen. 4) is a proprietary process that yields a better heat
Balanced Differential Inputs
Differential input circuitry measures the voltage of both the (+) and (-) input signal. The circuitry subtracts
NOMAD
NOMAD is a "real time" analog computer that protects your amplifier from shorting speaker wires and ...
CE Compliant
This product fulfills all essential safety and environmental requirements as defined in the European Directives
Specs
Specifications
24
| Number of Channels | 4 |
| 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 |
| Bridgeable | Yes |
| Frequency Response | 20 Hz - 20 kHz |
| Input Sensitivity | Low-Level: 150 mV - 4 V High-Level: 450 mV - 12 V |
| Circuit Topology Class | Class-D |
| Total Harmonic Distortion (THD+Noise) | 4Ω: <1.0% 2Ω: <1.0% |
| Signal Input | Front Low-Level: 4 RCA Front High-Level: 4-Pin Molex Rear Low-Level: 4 RCA Rear High-Level: 4-Pin Molex Input Switch: 2/4 Input (works for RCA/hi-level inputs) |
| Signal Output | Low-Level: 2 RCA (Pass-Thru active with RCA or Hi-Level input) |
| Tone Controls | No |
| Crossover Controls | Front 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 Controls | No |
| Visual Indicators | POWER (Blue) / PROTECT (Red) C.L.E.A.N. IN (Red) C.L.E.A.N. OUT Front (Blue/Red) C.L.E.A.N. OUT Rear (Blue/Red) |
| Power Wire Gauge | 4 AWG |
| Power Input Connector | Compression Terminal Block |
| Speaker Wire Gauge | 8 AWG |
| Speaker Output Connector | Compression Terminal Block |
| Cooling | Convection |
| Operating Voltage | 9 - 16 VDC |
| Recommended Fuse (not included) | 60 A |
| Max. Current Draw (13.8V Sinewave) | 39 A |
| 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) |
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Installation resources
Wiring diagrams
10
Wiring Diagram #1
Source: Rockford Fosgate
Wiring Diagram #2
Source: Rockford Fosgate
Wiring Diagram #3
Source: Rockford Fosgate
Wiring Diagram #4
Source: Rockford Fosgate
Wiring Diagram #5
Source: Rockford Fosgate
Wiring Diagram #6
Source: Rockford Fosgate
Wiring Diagram #7
Source: Rockford Fosgate
Wiring Diagram #8
Source: Rockford Fosgate
Wiring Diagram #9
Source: Rockford Fosgate
Support
Return Authorization
If you bought this product from Onkar Electronics, use the Contact Us page on the Onkar Electronics website and we will help with return authorization and warranty support. If you purchased it from another dealer, contact that authorized dealer first for return assistance.
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