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Powerful and compact amp that’s easy to install and tune—well suited to door and component speakers, but not intended as a subwoofer driver.
Buyer confidence
88%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)
- 500 Watts
- Rated Power (RMS Continuous Power)
- 75 Watts x 4 @ 4Ω 125 Watts x 4 @ 2Ω 250 Watts x 2 @ 4Ω Bridged/Mono
- Dynamic Power (PVC/PowerCube®)
- 90 Watts x 4 @ 4Ω 160 Watts x 4 @ 2Ω 300 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)
- 500 Watts
- Rated Power (RMS Continuous Power)
- 75 Watts x 4 @ 4Ω 125 Watts x 4 @ 2Ω 250 Watts x 2 @ 4Ω Bridged/Mono
- Dynamic Power (PVC/PowerCube®)
- 90 Watts x 4 @ 4Ω 160 Watts x 4 @ 2Ω 300 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 reviewsCompact, clean‑sounding 4‑channel with easy setup
Powerful and compact amp that’s easy to install and tune—well suited to door and component speakers, but not intended as a subwoofer driver.
What buyers praise
- Compact form factor — easy to mount under seats or in tight spots
- Clean, powerful output that enhances component and coaxial speakers
What to watch for
- Not suitable for driving subwoofers or deep low‑bass duties
Overview
The R2-500X4 is a 500 watt, full-range Class-D 4-channel amplifier engineered for efficient power delivery and straightforward setup. It can run at 4Ω or 2Ω in stereo and be bridged to 4Ω mono. Key onboard technologies include C.L.E.A.N. clipping detection and a P.O.W.E.R. supply for improved dynamic output.
Best for
- Drivers who want a compact, efficient 4-channel amp for upgraded sound
- Systems that need stereo output at 4Ω or 2Ω and the option to bridge to a single 4Ω channel
- Use with factory audio or custom aftermarket head units and speakers
Key points
- 500 watt full-range Class-D design for high efficiency
- Selectable operating loads: 4Ω or 2Ω stereo; 4Ω bridged/mono
- C.L.E.A.N. technology to aid accurate gain adjustment
- P.O.W.E.R. supply that boosts dynamic performance as voltage increases
- CTA-2006 compliant
- Balanced differential inputs and MEHSA 4 heat-sink application
Fit and use
Designed for easy integration with factory or aftermarket systems, the R2-500X4 is part of the Prime series intended to offer Rockford Fosgate performance at an economical price. The amplifier’s efficient Class-D topology reduces demand on a vehicle’s electrical system and simplifies placement where cooling and space are considerations.
What to know
This amplifier emphasizes efficiency and straightforward setup. Class-D output reduces electrical load compared with some other amplifier classes. Use the C.L.E.A.N. circuitry to help set gains accurately. The unit is CTA-2006 compliant and is built as a refined third-generation Prime Series model for consistent, pred…
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
- Rollback Protection
- Fully Adjustable 12 dB/octave High and Low pass Butterworth Crossovers
More info
Manufacturer details
Primed for Performance, the R2-500X4 is a 500 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 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. 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
P.O.W.E.R.
Power supply circuit design that allows the amplifier to increase output power as voltage increases.
Full Range Class-D
A full-range version of the Class-D topology which is a high efficiency amplifier design that reduces current
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
CTA-2006 Compliant
Power ratings on Rockford Fosgate amplifiers conform to CTA-2006 industry standards. These guidelines mean your
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 ...
Rollback Protection
During demanding musical conditions, the amplifier can dynamically reduce demand to prevent stress on the output
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) | 500 Watts |
| Rated Power (RMS Continuous Power) | 75 Watts x 4 @ 4Ω 125 Watts x 4 @ 2Ω 250 Watts x 2 @ 4Ω Bridged/Mono |
| Dynamic Power (PVC/PowerCube®) | 90 Watts x 4 @ 4Ω 160 Watts x 4 @ 2Ω 300 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) | 80 A |
| Max. Current Draw (13.8V Sinewave) | 59 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.
Popular Questions
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