Search  for anything...

Rockford Fosgate Prime R2-300X4 300-Watt 4-Channel Amplifier

Based on 170 reviews
Condition: New
Checking for the best price...
$309.99
Save $60.00 was $369.99

Buy Now, Pay Later


As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Nov 5 – Nov 6
Order within 12 hours and 56 minutes

Available payment plans shown during checkout

Protect Your Purchase

Easy claims online, fast replacements, no fees

Checking for protection plans...

At a glance

Condition
New
Model
R2-300X4
Weight
2.2 kg
Maximum Supply Voltage
16 V DC
Minimum Supply Voltage
9 V DC
Mounting Type
Through-Hole Mount
Output Power
300 watts
In the box
R2-300X4
Warranty
1-Year Manufacturer Warranty

Features 5

  • The R2-300X4 full-range class-D 4-channel amplifier (1.9" x 6.8" x 10.1") is packed with features and performance to deliver power and bass on demand with 300 Watts of RMS power
  • Class D technology makes this amp extremely efficient by reducing demand on the vehicles electrical system (RMS Power: 50 Watts x 4 @ 4 OR 75 Watts x 4 @ 2 OR 150 Watts x 2 @ 4 Bridged/Mono)
  • Featuring 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, and integrated Punch EQ that corrects for acoustic deficiencies while delivering up to 3X the bass
  • Featuring fully adjustable 12 dB/octave high and low pass butterworth crossovers, balanced differential inputs with RCA pass through outputs, high level input capable, defeat able auto turn on circuit and top mounted controls

Description

Built by Fanatics…For Fanatics! Truly a line designed by fanatics for fanatics, our family of products are developed by the same people that use them in their everyday lives. It’s the Rockford Fosgate commitment of passion, power and performance built into everything we produce, connecting enthusiasts to their music and machine. Best of all, our entire line of products are designed and engineered in Tempe, AZ, USA! The Prime R2-300X4 is a full-range class-D 4-channel amplifier, capable of operating at 4Ω or 2Ω stereo, and 4Ω bridged/mono and rocking 300 Watts of RMS power. 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 and the unique P.O.W.E.R. supply continues to generate more than the rated power as the voltage increases. The Prime Series was developed for car audio fanatics that want a reliable amplifier that won’t break the bank – with all the power and performance you’ve come to expect from Rockford Fosgate. Rockford Fosgate amplifiers are renowned world-wide for being “under rated,” easily surpassing all specifications, and most importantly, generating more power than their ratings. The latest generation of Prime Series amplifiers are also designed to be easy to setup and configure, making them perfect for use with factory audio or custom aftermarket systems. The Integrated Punch EQ corrects the acoustic deficiencies in the listening environment, by delivering up to 3X the bass via equalization. Rockford's integrated level setting technology called C.L.E.A.N (Calibrated Level Eliminates Audible Noise) is our patented circuit with input and output clip indicators that help match the source unit to the amplifier and optimize musical output

Specs 19

Manufacturer Rockford Fosgate
Maximum Supply Voltage 16 V DC
Minimum Supply Voltage 9 V DC
Mounting Type Through-Hole Mount
Brand Rockford Fosgate
Number of Channels 4
Output Power 300 watts
Maximum Output Power 300 watts

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Nov 5 – Nov 6

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


Great amp
It may be a prime but it’s perfect amp for my 6.5 and 6x9 Punch. The clean indicator is a great feature
Reviewed in the United States on June 5, 2026 by Steven Smith

So much better sound than the Android head unit by itself.
It's running on a Chinese Android head unit that was under powered. So much better sound and bass. Fits under the seat.
Reviewed in the United States on September 8, 2026 by DH

Poweful
Great quality using on 2-12subs
Reviewed in the United States on May 7, 2026 by Darcie Bale

Great product
I thought that because I was down grading, from a 600w to a 300w. I can not tell. Only difference is the 600w had a ‘’PUNCH’’ button
Reviewed in the United States on May 21, 2025 by Steven Robertson

Great Sound at a great price.
I needed to replace the Bose system in my car 06 Envoy. So I replaced the two front door speakers with the p 167 5 from Fosgate. Bypassed the factory amp and replaced it with the are two three hundred amp from Fosgate. Not a lot of money to spend but what a difference in sound quality. So anyone looking to improve their sound system on the cheap you should really look Fosgate amps and speakers. You will be amazed. ... show more
Reviewed in the United States on June 7, 2021 by john thompson

Watch for broken parts
The remote controller came broken
Reviewed in the United States on February 10, 2022 by john white

Extremely well designed Amplifier
Rockford Fosgate has really done an awesome job in the design of these amplifiers. I have this one running a total of 6 speakers. Two 6.5", two 6"x9" and two 3.5" Rockford Fosgate component speakers. So it's running two speakers at a 4 ohm load and four speakers at a 2 ohm load. I have a 50 mile one way commute and after listening for that amount of time (approximately 1.5 hours) the amp isn't even warm to the touch. I design electronics and I must say the thermal dissipation for these class D amps is phenomenal. Very much worth the price for the quality. ... show more
Reviewed in the United States on September 17, 2020 by Jeremy Sasser

Works great, sounds awesome!
Works as expected. The wiring connectors are high quality compression style.
Reviewed in the United States on March 22, 2025 by Paul
Checking for best price...