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Rockford Fosgate Prime R250X4

250W RMS 4-Channel Class AB Prime Series Full Range Amplifier

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• 40W x 4-Chan. @ 4 ohm
• 60W x 4-Chan. @ 2 ohm
• 125W x 2 Chan. @ 4 ohm Bridged
• Variable Bass Boost
• Variable High-Pass Crossover
• CEA-2006 Compliant
• Soft Start Turn-On

Learn more about the r250x4

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Product Highlights


• 40W x 4-Chan. @ 4 ohm
• 60W x 4-Chan. @ 2 ohm
• 125W x 2 Chan. @ 4 ohm Bridged
• Variable Bass Boost
• Variable High-Pass Crossover
• CEA-2006 Compliant
• Soft Start Turn-On

Description


Rockford Fosgate brand icon

Authorized dealer



The PRIME Choice

The Prime R250X4 is a 4-Channel amplifier perfect for any Car Audio Fanatic getting into mobile audio wanting a single amplifier to run a complete audio system. This amplifier features selectable Punch Bass to tune low frequencies, variable crossovers to either protect your high frequency speakers or feeding only bass to your subwoofers, and Pass-Thru jacks for daisy-chaining another amplifier.

Class-AB

An amplifier topology with the best of both worlds; a Class A preamp and Class B output stage. Class A topologies area great for sound quality but can require alot of current. Class B designs are great for power delivery. Amplifier designs utilizing a Class A/B topology reaps the benefit of great sound quality in the front-end (preamplifier stage) while delivering great power in the output stages (MOSFET drivers).

General Features

  • Prime Series Full Range Class AB 4-Channel Car Amplifier
  • RMS Power Rating:
    • 4 ohm: 40 watts x 4 chan.
    • 2 ohm: 60 watts x 4 chan.
    • Bridged, 4 ohm: 125 watts x 2 chan.
  • CEA-2006 compliant amplifier
  • MOSFET power supply
  • LED power (green) and protect (red) indicators
  • Variable Bass Boost (0 to +12 dB bass boost at 45 Hz)
  • Soft Start Turn-on
  • 4/2 channel switch
  • 50 Amp In-line fuse is highly recommended
  • Heavy duty cast aluminum alloy heatsink for extreme heat dissipation
  • Variable high-pass filter (50-250 Hz, Butterworth 12 dB/octave)
  • Variable low-pass filter (50-250 Hz, Butterworth 12 dB/octave)
  • Dimensions: 11-1/4"L x 6-3/4"W x 2"H
  • 8-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product history:

Rockford Fosgate R250X4 thumbnail
(newest, current model)
Rockford Fosgate R250-4 thumbnail
(previous model, replaced by Rockford Fosgate Prime R250X4)

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Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
40 watts x 4 channel
RMS Power @ 2 ohms
60 watts x 4 channel
Bridged RMS Power
125 watts x 2 channel
Amplifier Specifications
Series
Prime Series
Amplifier Class
A/B
Number of Channels
4-Channel
Total RMS Power Output
250 watts
Maximum Input Gauge Size
8 AWG
Minimum Impedance Unbridged
2 ohm
Minimum Impedance Bridged
4 ohms
THD at Rated RMS Power
1.0%
Speaker Level Inputs
Yes
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
High-Pass Crossover Frequency
50 - 250 Hz
Low-Pass Crossover Frequency
50 - 250 Hz
Signal-to-Noise Ratio
100 dB
Channel Separation
50 dB
Bass Boost
Selectable 0/+6dB/+12dB
Remote bass/level controller
Optional (Accessory required and sold separately)
Strappable
No
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

R250X4

Weight:

6.50lbs

Internal SKU:

r250x4

Internal Product ID:

67752

Product and How-to Videos


  • 3Sixty3 Aftermarket Setup Wizard Tutorial
  • Rockford Fosgate Prime Series Amplifiers
  • How To Install an Amplifier: Car Amplifier Basics Part 2

Customer Ratings & Reviews


Rockford Fosgate Prime R250X4 thumbnail image

5 star
64%
4 star
18%
3 star
18%
2 star
0%
1 star
0%



Durability
5
Value
4.9
Features
4.8
Design
5
Usability
5

Customer Reviews

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Great Buy

My son simply loves Rockford Fosgate products this is the only site he will buy from . Thank you so very much for carring this line of Products

By Debbi on August 8, 2014

23 found this helpful


Great Amp

this is the 2nd Rockford Fosgate amp I have purchased from Sonic, and I couldn't be more pleased. It's a small amp, but delivers big sound. When connected to my Kenwood head unit, it rocks! Not only will it blast my truck, at more normal volumes, it makes the music sound so much fuller. Rcokford Fosgate tests all their amps before they ship, so even though its rated at 250 amps, mine tested at 336 amps, wow. easy hook up ans small package to hide in Reg cab truck. I would definitely recommend

By JetAMT on October 19, 2014

20 found this helpful


Great four channel amp !

I installed this amp for a friend's mom . In a Toyota suv . I upgraded the factory jbl door speakers I wanted an amp with enough power to push four 100 rms speakers . This Rockford amp didn't disappoint . Like most Rockford amps it is underrated my birth sheet said 270 watts as tested . Bottom line is plenty of power good separation from front to rear . This is a good mids and highs amp . I high recommend .

By Big John on January 9, 2014

23 found this helpful


Great amp

This amp is great. It pushes my kicker 6x9s and Polk 6 1/2 perfect. Cristel clear sound worth the money. Been running this amp for a month now can't say anything bad about it. Love shopping with sonic great products and prices.

By Nathan on March 23, 2015

11 found this helpful


Very reliable

I’ve own this for a few months already and still working great on my single cab truck highly recommend

By Anonymous on April 24, 2019 Checkmark Icon Verified purchase

1 found this helpful


Great value

Very pleased with my purchase and with the speedy shipping over all a great place to buy from

By Anonymous on August 5, 2018

1 found this helpful


Can You Cook On This Thing?

First, I'll say this puts out great power. But, it gets HOT! I had it powered fully at 4 ohms and when I went to touch it I actually backed my hand off of it. I'm scared to actually take it down to 2 ohms because of how hot it gets now. Anyway, same quality you get from any Rockford Fosgate amp, just that one little hiccup. Just make sure its in a very well ventilated area, and you'll be okay. When I have the windows down and air flowing right to it, it doesn't get as hot as when I'm just driving around with the windows up and no AC on. With that heat though, it puts out some weird noises through the speakers. It doesn't do it before it gets heated up, but once it gets hot, sound quality goes down quite a bit. With that said, its still in tact very well and hasn't smoked at all. I have smelt it getting hot, but never actually seen any differences in it. It has been holding up very well for how hot it gets, and I drive long distances constantly.

By Zachary on November 20, 2015 Checkmark Icon Verified purchase

2 found this helpful


By Octavio on January 12, 2025 Checkmark Icon Verified purchase


By Benito on September 2, 2024 Checkmark Icon Verified purchase


Great amp, get hot

Plenty of power in my application (96 Vette) but gets hella hot.

By Jeff in Hades on July 2, 2016




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