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Rockford Fosgate Prime R2-500X4

500W RMS Class D Prime Series 4 Channel Car Amplifier

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• 75 watts x 4 channel @ 4 ohm
• 125 watts x 4 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Learn more about the r2500x4
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$359.99

 with warranty

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Product Highlights


• 75 watts x 4 channel @ 4 ohm
• 125 watts x 4 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Description


Rockford Fosgate brand icon

Authorized dealer


R2-500X4

Primed for Performance, the R2-500X4 is a 500 watt, full-range Class-D amplifier capable of operating at 4 ohm or 2 ohm stereo and 4 ohm 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.

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.


Product Details:

  • Prime Series Class D 2 ohm Stable 4-Channel Amplifier
  • RMS Power Rating:
    • 4 ohm: 75 watts x 4 channel
    • 2 ohm: 125 watts x 4 channel
    • Bridged: 250 watts x 2 channel @ 4 ohm
  • Total power output: 500 watts
  • Power, C.L.E.A.N in, out (front and rear) LED visual indicators
  • Speaker-level (high-level) inputs
  • 1 pair of pre-amp outputs
  • Balanced Differential Inputs with RCA Pass Through Outputs
  • Auto-Sense bypass switch for vehicles with RAP (Retained Accessory Power)
  • Features C.L.E.A.N. Set-up
  • Fully Adjustable 12 dB/octave High and Low pass Butterworth Crossovers
  • Top Mounted Control Panel
  • CEA-2006 Compliant and CE Compliant
  • Cast aluminum heat sink
  • Top Mounted Control Panel
  • 2/4 Channel Input Selection Switch
  • Short Circuit, Over Current, and Rollback Protection
  • Input sensitivity:
    • Low level: 150mV - 4 volts
    • High level: 450mV - 12 volts
  • Frequency Response: 20 - 20000 Hz
  • Total Harmonic Distortion (THD): 1%
  • Signal to Noise Ratio: 80 dB
  • Variable high-pass filter: 50 - 250 Hz
  • Variable low-pass filter: 50 - 250 Hz
  • Fuse Rating: 80A
  • 4 AWG gauge amplifier wiring kit is recommended for installation
  • Dimensions: 6.8" L x 10.1" W x 1.9" H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty
  • MFR #: R2-500X4

Specifications & Details


Key Features
Amplifier Key Features
Speaker Level Inputs
Power Specifications - Full Range Channels
RMS Power @ 4 ohms
75 watts x 4 channel
RMS Power @ 2 ohms
125 watts x 4 channel
Bridged RMS Power
250 watts x 2 channel
Power Specifications - Full Range Channels
Peak Power @ 4 ohms
90 watts x 4 channel
Peak Power @ 2 ohms
160 watts x 4 channel
Bridged Peak/Max Power
300 watts x 2 channel
Amplifier Specifications
Series
Prime Series
Amplifier Class
D
Number of Channels
4-Channel
Total Peak Power Output
640 watts
Total RMS Power Output
500 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
2 ohm
Minimum Impedance Bridged
4 ohms
Frequency Response
20 - 20000 Hz
THD at Rated RMS Power
1%
Speaker Level Inputs
Yes
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
Full (AP)
High-Pass Crossover Frequency
50 - 250 Hz
Low-Pass Crossover Frequency
50 - 250 Hz
Signal-to-Noise Ratio
80 dB
Remote bass/level controller
No
Fuse Rating
80A x 1 
Total Fuse Rating
80
Strappable
No
Amp Bluetooth Connectivity
No
Hi-Res Certified
No
Low-Level Input Sensitivity
150mV - 4 volts
High-Level Input Sensitivity
450mV - 12 volts
What is in the box?
Paperwork
User manual
Warranty/Registration card
Power certification
WITB: Amplifiers
Amplifier
Mounting screws (4)
High-level input wiring harness w/ molex connectors (2)
Allen wrench
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

R2-500X4

Weight:

4.97lbs

Internal SKU:

r2500x4

Internal Product ID:

177725

Product and How-to Videos


Customer Ratings & Reviews



5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
5
Value
5
Features
5
Design
5
Usability
5

Customer Photos & Videos


Customer Reviews

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Price worthy

All in one for a simple, clean listening experience. Distortion detection built in so you won’t have to guess max volume when setting the gains. Nice sleek design with the performance to match.

By Efrem on December 8, 2022 Checkmark Icon Verified purchase

31

found this helpful.

Doesn't disappoint!

Fantastic mid-level amplifier. Instantly noticed the power and the clearness of the music. Perfect size for under the seat too. Be careful with the gain to start! Don't move it until you already have music playing... it'll kill your ears! Highly recommend!

By Drew on July 12, 2023 Checkmark Icon Verified purchase

27

found this helpful.

By david on March 16, 2023

26

found this helpful.

Very well packaged, Rockford makes amazing products. I know I am going to be happy with this amp!

By Ryan L on August 23, 2024 Checkmark Icon Verified purchase

1

found this helpful.

By ARMAND on August 22, 2024 Checkmark Icon Verified purchase

1

found this helpful.

By Osvaldo on April 29, 2025 Checkmark Icon Verified purchase

By Shem on January 27, 2025 Checkmark Icon Verified purchase


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