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Rockford Fosgate PRIME R250-1

250W Max, PRIME Series Monoblock Amplifier

Discontinued
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This item has been discontinued

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r2501d thumbnail

Rockford Fosgate R250-1D

OUR PRICE: $96.15

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  • PRIME Series Single-Channel Monoblock Class A/B Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 150 watts x 1 chan.
    • 2 ohms: 250 watts x 1 chan.
  • MOSFET Power supply
  • Power and protection LED indicators
  • Tuned Bass EQ (0-12 dB bass boost at 45 Hz)
  • Single-channel operation
  • 1 Pair of Preamp RCA outputs
  • Heavy duty extruded aluminum alloy heatsink for optimal heat dissipation
  • RCA level inputs
  • Screw terminals
  • Variable low-pass filter (40-130 Hz, 12 dB/octave)
  • CEA-2006 compliant amplifier
  • Frequency response: 20-250 Hz
  • Dimensions: 11-1/2"L x 7-5/8"W x 2-1/2"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.
  • 1-year SonicElectronix.com warranty

Product History:

Rockford Fosgate R250X1 thumbnail
(newest, current model)
Rockford Fosgate R250-1D thumbnail
(previous model, replaced by Rockford Fosgate R250X1)
Rockford Fosgate R250-1 thumbnail
(previous model, replaced by Rockford Fosgate R250-1D)

Power Specifications - Full Range Channels

RMS Power @ 4 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

150 watts x 1 channels
RMS Power @ 2 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

250 watts x 1 channels

Power Specifications - Subwoofer Channel

RMS Power @ 4 ohms
The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
RMS Power @ 2 ohms
The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
RMS Power @ 1 ohm
The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 1 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
Peak Power Output
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage. Often times this maximum is achieved during a brief musical burst, such as a drum accent or low bass hit. Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. This is the peak power output for the amplifier's 5th channel.

Amplifier Specifications

Amplifier Series
This designates the series of the amplifier. Many amps are available in a litany of different wattage and channel configurations, but maintain consistent features throughout the product line.
Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

AB
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
1 - Mono
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

250 watts
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
8 AWG
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
2 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
Not Bridgeable
THD at Rated RMS Power
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
1%
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
No
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
1 pair
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Low-pass (LP)
Low-Pass Crossover Frequency
The low-pass crossover frequency is typically used for subwoofers. It can be a fixed crossover point or a variable crossover range. A variable low-pass crossover allows you to select a specific crossover point which allows frequencies below the set crossover point to pass, while making frequencies above the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

40 - 130 Hz
Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
80 dB
Bass Boost
The objective of the bass boost is to get more kick out of your subwoofer. It is a circuit that emphasizes the lower frequencies at a given point. The bass boost should always be set first before setting the gain. This feature is known for destroying subwoofers and is commonly used incorrectly, so be cautious.
0 - 12 dB
Bass/Gain Remote
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
Yes
Fan Cooled
A great feature to have if an amp generates a large amount of heat. Cooling fans can help regulate the temperature to prevent the amp from overheating (burning).
No
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
30A x 1 
CEA-2006 Compliant
Amplifiers that have been tested to meet specific standards. When a car amplifier meets these standards, you can be sure that it will be able to produce the amount of power specified by the official CEA-2006 rating. Usually, these rating consist of the following items:
  • RMS Power
  • Signal-to-Noise Ratio

This rating applies to both external car amplifiers, as well as the amplifiers inside of in-dash stereos.

Yes
Strappable
Some amplifiers can be "strapped" together in order to increase the output of a single audio channel. These amplifiers feature RCA preamp outputs, allowing you to pass the signal directly from one amp to the other to ensure consistency.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
92%
4 Star
4%
3 Star
0%
2 Star
0%
1 Star
4%

Average Attribution Rating

Durability
4.8
Value
4.9
Features
4.6
Design
4.6
Usability
4.8

Basshead

Kennesaw, Ga

Overall
Durability
Value
Features
Design
Usability

Use your head

April 29, 2011

With the right system this amp is perfect. Whoever said this amp won't bump is either misinformed or ill educated in sound equipment. I'm running this with a mere 8 inch (e3.8) in a .35 sealed enclosure at half power, and my little Ford Focus looks like its having seizure. If you want a little more, try a 10 or 12 inch MTX with a nice ported box... assuming you are tuned correctly you are gonna bump without trying. Just keeping it simple people. I am tired of wannabe bass enthusiasts and their 1000 watt boss amps (this 250 will push nearly as hard with 10X the quality). Oh, and I should mention... your R250-1 will exceed its rating. Mine pushes a guaranteed 272 watts, just check the certificate when it comes in the mail. -Basshead

6 of 6 found this helpful

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Jose

Costa Rica

Overall
Durability
Value
Features
Design
Usability

Another great product from RF

July 26, 2010

It is a really good amp, like the title says, another great product from Rockford, I saw a couple of reviews made by a soniclectonix guy (not seth) and I decided to buy it, it feels really "well made", nice finish, power led is blue and it will illuminate the hole trunk, rated at 250 rms by Rockford but the birth sheet says the final output is 279 rms (certified by CEA2006) so this is great and delivers true power to your sub. It hits really hard and the knobs let you control crossover, gain and punch are very convenient. Overall, very good amp for beginners in car audio, this amp will not let you down. The only "not that good" thing a can say about it is that is not the cheapest amp around, but I guess that I you want high quality you have to pay extra for it PD. The shipping weight is about 8 pounds not 6

2 of 2 found this helpful

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morgan

Hollister, MO

Overall
Durability
Value
Features
Design
Usability

Great amp

March 8, 2012

Great amp. No problems. It's Rockford Fosgate people, they know what they are doing.

0 of 0 found this helpful

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Jonny

Salt Lake City

Overall
Durability
Value
Features
Design
Usability

Rockford Fosgate PRIME R250-1

February 22, 2012

This amp sucks. It lasted 4 months then blew up. After it fizzled out, it started draining the battery. I had it mounted in the cab of my truck, and had plenty of air flow around it, and it still ran hot.

0 of 0 found this helpful

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Kyle

Williamsville, IL

Overall
Durability
Value
Features
Design
Usability

Works perfect

February 8, 2012

Really great price and haven't had a single problem.

0 of 0 found this helpful

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sound frick

chgo

Overall
Durability
Value
Features
Design
Usability

great amp

November 24, 2011

I got every penny worth out of this amp highly recommend this for a regular sound system will not break the budget.

0 of 0 found this helpful

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joe

pasadena

Overall
Durability
Value
Features
Design
Usability

great product

October 25, 2011

They make quality componets that work great!!!

0 of 0 found this helpful

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Rub

Dallas,Texas

Overall
Durability
Value
Features
Design
Usability

SonicaaBoom

October 24, 2011

This amp is Thor in the box for my fosgate sub. i use the am for sub only while having to custom build 2 separate wiring looms for it to run off Qre5 this amp ravishes my sub. The expedition has large air space the 3cubic rear mid section custom armrest-box thumps the hell out of anyone in truck! The amp survived 100-110 heated days here in Dallas NEVER shut down yet, got so hot at times could not touch it. looks like fosgate has done it again Thanks for a Super ear pleaser guys makes for great Message also it hits really hard.

0 of 0 found this helpful

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Alex

San Antonio, Texas

Overall
Durability
Value
Features
Design
Usability

Great Amp

October 10, 2011

This amp is a great all around amp. It's qite small so it can be mounted in many locations. It doesn't get too hot. It looks great. Birthsheet came in at 274 watts. Pushes my P2 8" at two ohms and sounds great. Poorted box tuned to 36 hz. Only con I have is the finish of the amp. I do not know what the finish is but if sunlight ever hits it, it will eventually turn a copper orange color from the exposure.

0 of 0 found this helpful

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SHME

Wisconsin

Overall
Durability
Value
Features
Design
Usability

Bumps

October 10, 2011

This lil guy is legit, 6 months hasn't blown my sub but sure can pound when I turn it up. I've got it hooked up to a 2.5 farad capacitor and 1 10" inch pioneer ported box, thats all you need cuz you will be heard.

0 of 0 found this helpful

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Nacho1741

Claremore, OK

Overall
Durability
Value
Features
Design
Usability

Good Low power amp at great price!

August 29, 2011

Great amp, easy to install, and set up. Does get a little warm, but sure does bump! Great for a small system, maybe a single 8, 10 or 12.

0 of 0 found this helpful

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K17

Allentown, PA

Overall
Durability
Value
Features
Design
Usability

awesome amp

August 26, 2011

I got this powering a 10inch rockford in a fiberglass box. The amp powers it perfectly. As long as the amp is tuned properly it will sound amazing.

0 of 0 found this helpful

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David

Exeter, NH

Overall
Durability
Value
Features
Design
Usability

Excellent value!!!!!

August 23, 2011

I was surprised at how much I saved compared to that big name catalog company that I usually buy from. Another great feature was when I went to the checkout, this site had a "what you might need" area and it was very insightful. Thank's there guys!

0 of 0 found this helpful

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Nick

Amherst, NY

Overall
Durability
Value
Features
Design
Usability

Great Buy!!!

August 18, 2011

had this amp during a car accident and it held up nicely!! Love this amp. I have been having lots of trouble finding the right amp and this if def one that I will come back to again in the future!!!

0 of 0 found this helpful

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Bobby Rae

Reston VA

Overall
Durability
Value
Features
Design
Usability

Rockford Amp Running Perfectly

July 16, 2011

I use this product to power one 10" RF P2 subwoofer. It is a nicely matched setup. This amp has awesome features such as a remote gain nob. It never overheats, ever. It is compact and well built with a slick black finish. At night the blue leds light up my trunk. It has the right amount of power to produce awesome everyday sound, and enough to hit really really hard if you ask it too. Overall, perfect amp for a 16 year old on a budget.

0 of 0 found this helpful

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Charles

Bryson City, NC

Overall
Durability
Value
Features
Design
Usability

Great Litttle Thumper!

July 15, 2011

The R250-1 drives my subwoofer. At half volume one can see the windows moving inside of the cab. With your hand one can feel the truck body vibrating on the outside. The sound remains clear from low volume to wide open. I never dreamed that a 250 watt amp could produce the sound that this thing does. It was easy to set up, and runs very cool. It is a well made product, and is a great buy in its price range.

0 of 0 found this helpful

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Ian

Eagan, MN

Overall
Durability
Value
Features
Design
Usability

Great Amp!

July 10, 2011

This amp worked great at powering my 2 Kicker comp 8" subs. Very easy to use. Would recommend to others.

0 of 0 found this helpful

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Jonathan

Huntley, IL

Overall
Durability
Value
Features
Design
Usability

Sub 12

April 28, 2011

This is an excellent choice. the price is absolutely affordable and worth every cent. the quality is great. its the first sub i ever owned and it kicks hard. it takes about a month to break in to its full potential but its sweet. it gets loud and entertains all my friends. if your looking for a complete earthquake get the 15 but if you want a nice quality sub get the 12. btw most people say get two twelves but if you ask any bass experts all you need is one. if you get two 12's and one amp then the amps power is divided in two. over all sweet.

0 of 0 found this helpful

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Intelligent Designs

Beaumont, TX

Overall
Durability
Value
Features
Design
Usability

Great Deal!

April 19, 2011

I've installed a few of these as packages at my shop on 2 Prime 10's or 12's, and for the cost it does the job. Of course, the Punch 300 would be better but for the budget conscious, this is the way to go. There is not a better quality mono amp in this price range.

0 of 0 found this helpful

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Michael

Mount Juliet, TN

Overall
Durability
Value
Features
Design
Usability

Great little amp

March 20, 2011

Bought this to run RE Audio 8" DVC. Pro: Good power, Small, Easy install, plenty of power for a certain style sub. Not enough to thump. Con: None.

0 of 0 found this helpful

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Accessory Tools and Products

Accessories added

NVX XKIT82 8-Gauge Wiring Kit

In case you didn't know, NVX has top notch wire and this kit has everything you need!

Your Price $49.99

Rockford Fosgate RFK8I 8-Gauge Wiring Kit

Get a matching Rockford Fosgate wiring kit for your new Rockford amplifier!

Your Price $49.99

Belva BAK82

Complete 8 Gauge Amplifier Wiring Kit with 2-Channel RCA Interconnects

Your Price $17.99

NVX XBG3PK 1/0 Gauge OFC Big 3 Upgrade Kit

Comes with everything you need to upgrade your power and ground wire.

Your Price $79.99

Kicker Big 3 Package 1/0 Gauge Big 3 Upgrade Kit

Get all you need including wire cutters to upgrade your power and ground wire.

Your Price $149.99

Belva BBG3KT CCA 1/0 Gauge Big Three Kit

Features everything needed to upgrade factory power and ground wire.

Your Price $39.99

StreetWires FB8

8 Gauge Firewall Bushing

Your Price $6.95

NVX XDBU4 - Top of the Line!

Distribution Block with Two 1/0 or 4 AWG Inputs and Four 4 or 8 AWG Outputs

Your Price $17.99

Professional Installation for your Car Power Amplifier

Covers labor charges through our professional installer network.

Your Price $89.99

Kicker KI24 K-Series RCA Audio Interconnect Cable

4 Meters (13 ft.) 2-Channel K-Series RCA Audio Interconnect Cable

Your Price $16.95

NVX XIV25 V-Series 2-Channel RCA Cable

16.4 ft of V-Series 2-Channel RCA Audio Premium Interconnect Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $11.99

NVX XWS1625 16 AWG Speaker Wire

25 ft. of True 16 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $13.99

Belva BBSW127 12 AWG Speaker Wire

12 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $14.99

Belva BBSW167 16 AWG Speaker Wire

16 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $12.99

The Install Bay IB-CAP1F

True 1.0 Farad Car Audio Capacitor for up to 1000W Max

Your Price $37.99

e2 ECAP1 by Scosche - Mid-Level 1 Farad

Digital 1.0 Farad Car Audio Capacitor for up to 1000W Max

Your Price $49.99

SMD DD-1 Distortion Detector

Set the gain of an audio amplifier quickly and accurately

Your Price $149.99

Scosche SPL Meter SPL1000F

Handheld boomSTICK measures your SPL range from 60 to 135 dB

Your Price $21.99

AutoSound 2000 CD-102

High Frequency Test CD specifically designed for the set-up and evaluation of sound system imaging and placement.

Your Price $11.99

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Product Summary

Manufacturer

Model Number

R250-1

UPC

780687329914

Weight

6.00lbs

Internal SKU

r2501

Internal Product ID

21680

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Rockford Fosgate PRIME R250-1