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Alpine MRP-F250

4-Channel Amplifier

Discontinued
|

Good news and a little bad...

This item has been discontinued

But you may be interested in the newest model that's available.

mrpf300 thumbnail

Alpine MRP-F300

OUR PRICE: $149.99

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  • 4-channel car amplifier
  • 40 watts RMS x 4 at 4 ohms (50 watts RMS x 4 at 2 ohms)
  • 100 watts RMS x 2 bridged output at 4 ohms (4-ohm stable in bridged mode)
  • 2-, 3-, or 4-channel output
  • Variable high-pass/low-pass filters (50-400 Hz, 12 dB/octave)
  • Tuned Bass EQ (12 dB bass boost at 50 Hz for channels 3 & 4)
  • Subsonic filter (15 Hz, 24 dB/octave for channels 3 & 4)
  • Tri-way capable (Tri-Way Crossover required)
  • MOSFET power supply
  • CEA-2006 compliant
  • STAR Topology (minimizes internal noise and prevents ground interference)
  • Speaker- and preamp-level inputs
  • Preamp outputs
  • Gold-plated screw terminals
  • Fuse rating: 15A x 2
  • 10-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 11-1/4"W x 2-3/8"H x 9-9/16"D
  • 1-year SonicElectronix.com warranty

Product History:

Alpine MRV-F300 thumbnail
(newest, current model)
Alpine MRP-F300 thumbnail
(previous model, replaced by Alpine MRV-F300)
Alpine MRP-F250 thumbnail
(previous model, replaced by Alpine MRP-F300)

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.

40 watts x 4 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.

50 watts x 4 channels
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 speakers or subwoofers equals 1 ohm, 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.

Not Stable
Bridged RMS Power

Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the RMS power created once an amplifier is bridged.

100 watts x 2 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.

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.
4
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.

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.

200 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.
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
4 ohms
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.
1.0%
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.
Yes
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)
High-pass (HP)
High-Pass Crossover Frequency
The high-pass crossover frequency can be a fixed crossover point or a variable crossover range. A variable high-pass crossover allows you to select a specific crossover point which allows frequencies above the set crossover point to pass, while making frequencies below 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.

50 - 400 Hz
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.

50 - 400 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.
10 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.
12dB
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.
15A x 2 
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.

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
Not warranted
Labor Warranty Duration
Not warranted
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
91%
4 Star
9%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.9
Value
4.8
Features
4.5
Design
4.8
Usability
4.8

Rum Runner

Ashtabula, OH

Overall
Durability
Value
Features
Design
Usability

just what i needed.

May 18, 2013

previously had a 125x4 mtx amp powering my highs and it sounded good, hooked this up to 4 Sony XPlod 6.5s and its so clean and loud. love the simplicity and compactness.

0 of 0 found this helpful

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John

Fernandina Beach, FL

Overall
Durability
Value
Features
Design
Usability

Great amp at a great price!

July 3, 2008

This amp was so easy to set up! I have it hooked to my 9886 CD Player to power 2 sets of Infinity references and they sound great! Clarity, power, no clipping, what more can you ask for!? Not to mention it bears the Alpine name so you know it'll be a quality product.

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Gregory

Danbury, CT

Overall
Durability
Value
Features
Design
Usability

Crisp, Clean & Powerful

April 10, 2008

This amp is plenty powerful for mids and highs. It pushes my door speakers (Boston SX-60 fr.; S-65 rr) to levels far exceeding the realms of comfortable. The built in crossover is set to 65Hz. Like I said mids and highs. I have not had any issues with over heating or clipping. This is a high quality amp at a bargain basement price

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Steven

Tucson, AZ

Overall
Durability
Value
Features
Design
Usability

Worth the money

April 10, 2008

this amp is worth what there asking i bought this amp when it first came out for $500 and it is perfect this amp is more than enough power for your insides i have 5 speakers on it and i cant even turn the level half way up because this amp puts out so much when its bridged running at 4ohm this amp is the best amp for the price gets a little warm to the touch but never shut off so other than that iv never had a problem with this amp

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Glen

Spokane, WA

Overall
Durability
Value
Features
Design
Usability

Big improvement in sound

April 10, 2008

I recently had this Alpine amp installed in my 06 Monte Carlo. It's running with my factory radio, and through Kicker speakers in the doors and Pioneer 5 way speakers in the back. It was a huge improvement in the sound than with the factory amp. I was expecting a little more of a power boost, but the amp is only 40 watts a channel. If I get a factory radio in the future it will sound even better. I am very satisfied with the amp so far, and I would highly recommend it anyone looking for an amp that won't blow your budget. Thanks sonic for a quality amp and a far better price than retail.

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Sevag

Glendale, CA

Overall
Durability
Value
Features
Design
Usability

Great Amp for first setup

February 20, 2008

I purchased this amp to run the components for the front doors. I have the amp bridged for the 100x2 at 4ohms setup. efficient clean power. I don't even have the gain up that much and its already more then I can handle. It does get warm to the touch after an hour of use. Only thing its missing is an option to run active setup

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mike

Concord, CA

Overall
Durability
Value
Features
Design
Usability

Excellent for door speakers

October 17, 2007

I just installed this in my 2005 Dodge Ram 1500 to power 4 infinity door speakers. (one pair of Infinity 6x9's and one pair of Diamond 6") The system sounds so nice and compliments my two 10" Infinity subs well. The amp is very durably built too.

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Leslie

Gilbert, AZ

Overall
Durability
Value
Features
Design
Usability

This is a great amp

October 12, 2007

I love alpine. This amp sound great with my component speakers from alpine and my kenwood 6x9's. I don't have any problems pushing both sets.

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Jonathan

Canada

Overall
Durability
Value
Features
Design
Usability

Great Product

October 3, 2007

I originally bought a Pioneer Premier DEH-P490iB with 4 Infinity Reference 6812cf Speakers for my 2000 F150. I hooked everything up and thought is sounded alright but felt my system was still lacking something....this AMP!...I run all 4 speakers in 4-Channel mode, mids and highs sound great and it produces a good amount of bass, don't feel like I even need a sub. This Amp is amazing, really brought my system to life, highly reccomended

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joe

Hubbard, OH

Overall
Durability
Value
Features
Design
Usability

Wow

March 3, 2007

When i first had my speakers hooked up to my deck i was satisfied. Then i installed this beast to my front and rear speakers. My car is LOUD!!! What a difference.

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cui cani

Wilmington, CA

Overall
Durability
Value
Features
Design
Usability

power for a ittle thing

March 2, 2007

i am always surprised by alpine. There amps are so small but they put out loud clean bass. When i connected this amp to my infinity components and 3-way 6x9 i wasnt expecting a lot but to my surprise it made my speakers sound great. I know am not pushing them to the max with this amp but i love the way it sounds.

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Accessory Tools and Products

Accessories added

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

NVX XIV45 4-Channel RCA Audio Interconnect Cable

5 Meters (16.4 ft.) 4-Channel RCA Audio Interconnect Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $23.99

Kicker K-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!

Your Price $29.95

StreetWires ZN7 RCA Interconnect Cable

16.4 ft. of 4-Channel RCA Cable with hyper twist construction, oxygen free copper, and precision machined tips.

Your Price $59.99

Kicker 4-Channel RCA Audio Interconnect Cable

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

Your Price $19.95

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

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

AutoSound 2000 CD-104

Audiophile reference series test disc for evaluation of all audio components.

Your Price $11.99

Product Summary

Manufacturer

Model Number

MRP-F250

UPC

793276300805

Weight

10.00lbs

Internal SKU

mrpf250

Internal Product ID

6472

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: Alpine MRP-F250