Rockford Fosgate Prime R300-4 300-Watt Multi-Channel Amplifier

by Rockford Fosgate

Product Details

User's Guide [3.42mb PDF]

• Product Dimensions: 19.9 x 4 x 9.2 inches ; 8 ounces
• Shipping Weight: 1 pounds (View shipping rates and policies)
• Shipping: Currently, item can be shipped only within the U.S.
• ASIN: B001P85IV2
• Item model number: R300-4
• Average Customer Review: 4.8 out of 5 stars  See all reviews (15 customer reviews)
• Amazon Best Sellers Rank: #2,039 in Electronics (See Top 100 in Electronics)

Product Description

Amazon.com Product Description

Rockford Fosgate amplification at an unbelievable value. The R300-4 4-channel amplifier is so versatile, it will be the only amplifier your system needs. Full-range or component speakers on the front channels and a single R1S410 10" or R1S412 12" woofer bridged/mono on the rear. Consider your system clean, loud and done.

Rockford Fosgate Prime Series Amplification A new generation of performance geared toward the "novice" car audio enthusiast or first time buyer. The Prime series amplifiers feature legendary Rockford Fosgate power, controls, and functions while fitting into any budget. Now more than ever, it's easy to get Rockford Fosgate amplifier DNA into your car audio system.

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Rockford Fosgate amplification at an unbelievable value. Click to enlarge.

RCA inputs and pass-through jacks. Click to enlarge.

R300-4 Features

Power and Protect LEDs
The Protect LED illuminates if a short circuit or to low of an impedance is detected at the speaker connections. The amplifier will automatically shut down if this occurs.

RCA Input Jacks
The industry standard RCA jacks provide an easy connection for signal level input. They are nickel-plated to resist the signal degradation caused by corrosion.

Gain Control
The input gain control is preset to match the output of most source units.

Crossover Switch
Selectable switch for 80Hz High-Pass (HP), All Pass (AP), or Low-Pass (LP) operation.

Variable Crossover (Low Pass Only)
A built-in 12dB/octave Butterworth filter with a crossover point variable from 50Hz to 250Hz.

Punch Bass
The Punch Bass control provides a bass boost up to 12dB @ 45Hz. Adjustable between 0dB, +6dB and +12dB.

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R300-4 Specifications

Number of Channels:	4
Rated Power:	50 Watts RMS x 4 @ 4-Ohms 75 Watts RMS x 4 @ 2-Ohms 150 Watts RMS x 2 @ 4-Ohms Bridged/Mon
Total Power:	300 Watts
Dynamic Power:	Front Channels: 62 Watts x 2 @ 4-Ohms 0 degrees Res 98 Watts x 2 @ 2-Ohms 0 degrees Res Front Channels: 61 Watts x 2 @ 4-Ohms 0 degrees Res 89 Watts x 2 @ 2-Ohms 0 degrees Res
Bridgeable:	Yes
Efficiency (average):	59% @ 4-Ohm 49% @ 2-Ohm
Crossover Controls:	Front Channels High-Pass (HP): 80Hz @ 12dB/octave Butterworth Low-Pass (LP): 50Hz-250Hz @ 12dB/octave Butterworth Rear Channels High-Pass (HP): 80Hz @ 12dB/octave Butterworth Low-Pass (LP): 50Hz-250Hz @ 12dB/octave Butterworth
Tone Controls:	Front Channels Punch Bass: 0dB/+6dB/+12dB @ 45Hz Rear Channels Punch Bass: 0dB/+6dB/+12dB @ 45Hz Function works when crossover in (LP) position
Signal Input:	Low Level: 2 RCA pair
Signal Output:	n/a
Power Input Connector:	Screw terminal barrier strip
Power Wire Gauge:	4 AWG
Speaker Output Connector:	Screw terminal barrier strip
Speaker Wire Gauge:	8 AWG
Heat Sink Type:	Extruded aluminum
Cooling:	Convection
Remote Controls:	n/a
Visual Indicators:	Power Protect
Circuit Topology Class:	Class A/B
Frequency Response:	20Hz to 20kHz +/- 1dB
Shipping Weight:	TBA
Dimensions (HxWxL):	2.40 x 7.67 x 17.09 (in) 6.10 x 19.49 x 43.40 (cm)

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Thirty Years of Rockford Fosgate

Rockford Fosgate products have been designed and engineered in Tempe, Arizona since the beginning. Rockford's 30 year reputation is grounded in engineering and manufacturing some of the finest audio products in the world. The company's no-compromise approach has yielded patented iconic products such as the Punch EQ, Punch 45 amplifier and the 3Sixty integrated signal processor. Today, Rockford's new products push the performance envelope even further. Each new product is a step forward--they sound bigger, they play louder, and run longer. Rockford never settles for "good enough."

The 2010 product line represents the company's core philosophy. Rockfords new amplifiers, speakers and subwoofers have raised the bar on the competition.

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What's in the Box

Rockford Fosgate Prime R300-4 150 Watt Stereo Amplifier, User's Manual

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Need More Amp?

Step up to the Punch Series P400-4 or the Power Series T400-4 (both 400-watt multi-channel amps) or check out the many other Rockford options.

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Rockford Fosgate Prime Series Amplification

Rockford Fosgate Prime R150-2 150 Watt Stereo Amplifier	Rockford Fosgate Prime R300-4 300 Watt Multi Channel Amplifier	Rockford Fosgate Prime R250-1 250 Watt Mono Amplifier	Rockford Fosgate Prime R500-1 500 Watt Mono Amplifier	Rockford Fosgate Prime R1000-1D 1000 Watt Mono Amplifier

Product Description

Rockford Fosgate Prime 300 Watt Multi-channel amplifer with on-board adjustable crossover, gain control. Amplifier features unregulated power supply, and on board Punch bass. CEA Certified RMS Power Rating 50 watts x4 @ 4 Ohms, 75 watts x4 @ 2 Ohms, 150 watts x2 @ 4 Ohms Briged. Visit www.RockfordFosgate.com 24 hours a day for technical support or call [phone] M-F 7 am to 5 pm MST.

Customer Reviews

Most Helpful Customer Reviews

10 of 11 people found the following review helpful:

5.0 out of 5 stars outstanding quality for the price, June 25, 2009

By 

Martin Rojas Hacker "Martineger" (Providence, RI USA) - See all my reviews
(REAL NAME)   

This review is from: Rockford Fosgate Prime R300-4 300-Watt Multi-Channel Amplifier (Electronics)

Don't waste your time looking for other brands. If you want the best quality and power for your car audio system, get ROCKFORD. I replaced my 600W sony 4 channel amplifier for this one, and let me tell you, there is no comparison. I connected 2 120 W sony speakers and bridged a 400 W Sony Subwoofer...the sound from the speaker is loud and clear (similar to what I was getting from the Sony amplifier)...But the sound that I'm getting from the subwoofer is just amazing - and its only halfway of the power (the whole car shakes when on)...I strongly recommend this product and wont never go back to brands like sony or pioneer for amplifiers

7 of 8 people found the following review helpful:

4.0 out of 5 stars Pretty but flawed, March 25, 2011

By 

StereoInstaller1 - See all my reviews

This review is from: Rockford Fosgate Prime R300-4 300-Watt Multi-Channel Amplifier (Electronics)

What a great looking amp! Typical Taiwanese construction, excellent terminals, nicely laid out controls. The S/N ratio is a little noisy, but unless you listen to piano solos in an insanely quiet car you will never notice the tiny bit of hiss.

I was very impressed with the dynamics of the sound though, very "punchy" (har-dee-harhar) and nice clarity. Vocals were nice and clean, cymbals properly shimmery...SQ was just fine all around. Bass guitar in particular was fun, full and fat.

2 issues for this amp IMO, and the first is a truly glaring feature omission: the High Pass Filter is fixed at 80Hz. If you own one of the thousands of cars with a smaller front speaker (if your vehicle uses anything smaller than a full depth 6.5" driver up front) makes this amp a very poor choice, unless you plan an external crossover.

That fixed 80Hz crossover might explain the "fat" midbass, but it certainly was not appreciated by the 5.25" speakers in the front of the BMW.

The second issue is heat. This sleek looking amp does not have adequate heat dissipation IMO, especially if you plan on running a 4 ohm mono sub on half of the amp (my general "starter" setup). Likely you will need to do something about the heat issue, especially if the amp is enclosed in any way.

Oddly enough, the larger mono amp that uses this same heatsink doesn't seem to have this issue, even on a 2 ohm mono load.

This "Prime" series is terrific looking product with only a couple of tiny flaws, and priced very nicely.

2 of 2 people found the following review helpful:

5.0 out of 5 stars Such good VALUE!!!, September 3, 2011

By 

K Anandasagar - See all my reviews

Amazon Verified Purchase

This review is from: Rockford Fosgate Prime R300-4 300-Watt Multi-Channel Amplifier (Electronics)

This little amp can pretty much blow the speakers on all my doors NO PROBLEM. It is an absolute tank, produces crystal clear sound and is insanely priced! This is my first RF multi channel amp and honestly I can't see myself upgrading to anything else for a long time IE unless it either breaks or gets stolen. And it's SUCH good VALUE!!! I you've been lucky enough to end up reading this then just buy the damn thing you won't be disappointed and you'll save a couple bucks as well :)