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Rockford Fosgate PRIME R300-4

300W, Prime Series 4-Channel Amplifier

4.8

(21 reviews)

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Specials with this product

  • Free Ground Shipping to the 48 statesdetails
  • Prime Series 4-Channel Class A/B Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 50 watts x 4 chan.
    • 2 ohms: 75 watts x 4 chan.
    • Bridged, 4 ohms: 150 watts x 2 chan.
  • MOSFET power supply and output stage
  • LED power and protect indicators
  • Bass Boost/EQ details: selectable bass boost (0, 6, 12 dB at 45Hz)
  • 4/3/2 channel operation
  • 2-Way System Protection circuitry (overload and speaker short protection)
  • Adjustable gain from 150mV to 8V
  • Heavy duty extruded aluminum alloy convection heat sink for extreme heat dissipation
  • Nickel-plated RCA level inputs
  • Nickel-plated screw terminals
  • Variable high-pass filter (80 Hz)
  • Variable low-pass filter (50-250 Hz, 12 dB/octave Butterworth)
  • CEA-2006 compliant amplifier
  • Frequency response: 20-20,000 Hz
  • Dimensions: 17.09"L x 7.67"W x 2.40"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.
  • 1-year SonicElectronix.com warranty
Power Specifications - Full Range Channels
RMS Power @ 4 ohms50 watts x 4 channels
RMS Power @ 2 ohms75 watts x 4 channels
RMS Power @ 1 ohmN/A
Bridged RMS Power150 watts x 2 channels
Peak Power OutputN/A
Amplifier Specifications
Amplifier ClassAB
Number of Channels4
Total Peak Power OutputN/A
Total RMS Power Output300 watts
Maximum Input Gauge Size8 AWG
Minimum Impedance Unbridged2 ohms
Minimum Impedance Bridged4 ohms
THD at Rated RMS Power1%
Speaker Level InputsNo
Preamp OutputsNo
Built-in CrossoverLow-pass (LP)
High-pass (HP)
Full (AP)
High-Pass Crossover Frequency80 Hz
Low-Pass Crossover Frequency50 - 250 Hz
Subsonic FilterN/A
Signal-to-Noise Ratio70 dB
Channel SeparationN/A
Bass Boost0, 6, 12dB
Bass/Gain RemoteNo
Fan CooledNo
Fuse Rating25A x 2 
CEA-2006 CompliantYes
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration1 year
Labor Warranty Duration1 year
Warranty ProviderSonic Electronix
Customer Review Summary for Rockford Fosgate PRIME R300-4
Average Customer Rating is 4.8 out of 5 stars:
4.8
based on 21 Reviews
Share your thoughts with others:
Rating Distribution:
5 star:
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76%
4 star:
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24%
3 star:
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0%
2 star:
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0%
1 star:
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0%
what's this?
Average Attributes Rating:
Durability
4.9
Value
4.9
Features
4.6
Design
4.5
Usability
4.8
what's this?
Most Helpful Customer Reviews:
December 23, 2010 GOOD AMP
1 of 1 people found the following review helpful:
Review by
John from Lebanon, PA
Overall
Durability
Value
Features
Design
Usability
I don't have a whole lot of experience with car amps, but my home systems have always been the envy. My friends would spend twice as much as me, and would eventually just have to concede that my system had the best sound. I know what I'm doing. My electronics background, and years as a musician with perfect pitch hearing is my gift. I feel I hit it right on the mark again in building my relatively inexpensive car system, starting with this amp!!!
The amp is clean, and loud. Plenty loud for the little Nissan I have it in.
In a larger sedan, I might want to step up the watts, but I like it loud. I have this pushing the two front, and two rear speakers, with a separate powered sub. It was stinking hot this summer, and it's stinking cold now!!! I had no problems what so ever. I didn't wait till the car cooled down any before I cranked it up, and the amp handled all that heat in my black car.
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June 10, 2010 r300.4
1 of 1 people found the following review helpful:
Review by
Maxwell from carmichael, CA
Overall
Durability
Value
Features
Design
Usability
I have this amp powering all my pioneer door speakers, i play it loud for extended amounts of time and no overheating at all, great sturdy amp at a unbeatable price.
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April 14, 2012 Powers the entire system
Review by
JB from Lexington,Ky
Overall
Durability
Value
Features
Design
Usability
I wrestled for sometime on which amp to go with as I was extremely limited on space, so I went with the fosgate 300-4. Im running a pioneer head unit, cadence 7v line driver as far as high end speakers I choose a pair of kicker 6.5's for the doors and kicker 6x9's for the rear and went with a kicker c124 sub. I am absolutely amazed by the bass and how clear the high end is. If you were in doubt about running "only 150 watts" to your sub(s) have no fear, this amp does a fantastic job. For the money you'll not find better.
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February 17, 2012 Clean Straight up sound
Review by
RYAN from NEW ORLEANS, LA
Overall
Durability
Value
Features
Design
Usability
I recently bought this amp and the sound, power, and price you cant beat. I am powering some diamond audio 6-1/2" components and factory 6x9s clean & pure sound. I recommend this amp to anyone who is looking for great undistorted sound. Pros- doesn't take up plenty space for the amount of power that it has, Cons-couldn't find any you cant go wrong buy this amp.
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January 26, 2012 Excellent Product
Review by
mofosta from Amarillo, Texas
Overall
Durability
Value
Features
Design
Usability
I have had several Rockford Fosgate products in the past. My last Rockford amplifier lasted 14 years. I have purchased many of their items from amps to speakers to head units. Very reliable product. I will continue to purchase Rockford products as well as recommend them to others.
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View All 21 Reviews for Rockford Fosgate PRIME R300-4
Amplifier Wiring Kits
Get the wires you need to properly install and power your car amp.
 ProductPriceAdd?
Monster Cable BAP300Monster Cable BAP300
8 Gauge Amplifier Installation Power Kit (No RCA Interconnects)
$40.00
Kicker DCK8Kicker DCK8
8 Gauge Amplifier Installation Kit with RCA Interconnect Cable
$49.99
Bass Remote Control
Control the volume level of your bass and amplifier from the front of the vehicle.
 ProductPriceAdd?
Universal Remote Level Bass ControlUniversal Remote Level Bass Control
Controls bass level and frequency via RCA/Interconnect connectors on any amp.
$14.99
Small Universal Remote Level Bass ControlSmall Universal Remote Level Bass Control
The Scosche RLC is a smaller universal bass remote that connects via RCA inputs.
$12.99
Speaker Wire
Improve the sound quality by delivering more power when replacing your factory wiring. High quality speaker will maximize your amplifier investment and system performance.
 ProductPriceAdd?
Kicker XW1220 Speaker WireKicker XW1220 Speaker Wire
12 Gauge Wire - 20 ft. of Dual Twist Speaker Cable with Sleeves for a Clean Install
$24.49
StreetWires SCP1215BL - 12 AWG Speaker WireStreetWires SCP1215BL - 12 AWG Speaker Wire
12 Gauge Wire - 15 ft. of Speaker Cable with Twisted Construction
$19.99
RCA Interconnects
You will need a good set of RCA interconnect cables to connect your amplifier to your head unit. Using high quality cables ensure the best sound possible by reducing unwanted noise interference, providing tight contacts, and utilizing the latest in cable technology.
 ProductPriceAdd?
Kicker 4-Channel RCA Audio Interconnect CableKicker 4-Channel RCA Audio Interconnect Cable
4 Meters (13 ft.) 4-Channel RCA Audio Interconnect Cable with Dual Twisted-Pair, Hyper-Flex Technology
$21.99
Kicker Z-Series RCA Interconnect CableKicker Z-Series RCA Interconnect Cable
19 ft. of 4-Channel RCA cable with dual twisted-pair conductors, hyper-flex technology, and gold plated contacts for maximum signal transfer!
$23.99
StreetWires ZN7 RCA Interconnect CableStreetWires ZN7 RCA Interconnect Cable
16.4 ft. of 4-Channel RCA Cable with hyper twist construction, oxygen free copper, and precision machined tips.
$49.99
Capacitors
Capacitors store energy for the amplifier to use on demand, thereby assisting in the elimination of dimming lights during peak power surges during use.
 ProductPriceAdd?
Raptor C1F ** SPECIAL PRICE **Raptor C1F ** SPECIAL PRICE **
True 1.0 Farad Car Audio Capacitor for up to 1000W Max
$34.99
e2 ECAP1 by Scosche - Mid-Level 1 Farade2 ECAP1 by Scosche - Mid-Level 1 Farad
Digital 1.0 Farad Car Audio Capacitor for up to 1000W Max
$45.99
Rockford Fosgate RFC1D - Top of the Line 1 FaradRockford Fosgate RFC1D - Top of the Line 1 Farad
Digital 1.0 Farad Car Audio Capacitor for up to 1000W Max
$104.99
Installation, Tools & Accessories
With our professional install card, you can have your amp installed by a pro near you, or you can purchase tools and do the install yourself.
 ProductPriceAdd?
StreetWires FB8StreetWires FB8
8 Gauge Firewall Bushing
$4.99
Kicker DB1448 (09DB1448) - Top of the Line!Kicker DB1448 (09DB1448) - Top of the Line!
Distribution Block with Two 1/0 or 4 AWG Inputs and Four 4 or 8 AWG Outputs
$18.99
Professional Installation for your Car Power AmplifierProfessional Installation for your Car Power Amplifier
Covers labor charges through our professional installer network.
$89.99
Testing and Performance
Optimize your system's performance with testing tools such as SPL meters, bass test discs and more!
 ProductPriceAdd?
AutoSound 2000 CD-104AutoSound 2000 CD-104
The ultimate amplifier level setting disc used for evaluation of audio components
$12.99
AutoSound 2000 CD-102AutoSound 2000 CD-102
High Frequency Test CD specifically designed for the set-up and evaluation of sound system imaging and placement.
$12.99
AutoSound 2000 CD-103AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components.
$12.99
Main Product
 ProductPriceAdd?
Rockford Fosgate R300-4Rockford Fosgate PRIME R300-4$139.99
Related products
Alpine Speakers + Rockford Fosgate Amplifier Bundle
5-1/4" Type S Series Car Speakers • 340W Max • 110W RMS • Prime Series 4-Channel Class A/B Car Amplifier • MOSFET Power Supply • CEA-2006 Compliant Amplifier • Amplifier Kit • Sound Dampening Material
JBL Speakers + Rockford Fosgate Amplifier Bundle
6" x 8" Power Series Car Speakers • 450W Max • 150W RMS • Prime Series 4-Channel Class A/B Amplifier • MOSFET Power Supply • 2-Way Protection Circuitry • Amplifier Kit • Sound Dampening Material

Product Summary

Manufacturer: Rockford Fosgate
Model number: R300-4
UPC: 780687328801
Weight: 9.00 lbs
Internal SKU: r3004
Internal product ID: 19566

Price Information

$249.99

–$110.00

$139.99

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Customer Testimonial

The best place to buy car audio. The service is excellent and the prices are the best period. Trust me, you will not find a better company. I personally went to sonicelectronix when I was in Valencia and was amazed how good the service was in person. Thank you sonic.

- Jim from sacramento

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