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Alpine MRV-F300

4-channel car amplifier — 50 watts RMS x 4

Item #: 500MRVF300

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28 Reviews | 7 questions - 12 answers

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Compact powerhouse

Alpine was thinking about versatility when they built their V-Power Series MRV-F300 4-channel amplifier.

  • In 4-channel mode, it delivers 50 watts RMS to each of your car's front and rear speakers, making for some sweet sound on your drive.
  • You can also run this amp in 3-channel mode, powering a subwoofer with 150 watts RMS while driving a pair of full-range speakers with 50 watts each.
  • Or, if you need a good amp for bass, you can switch the amp to 2-channel mode and send up to 150 watts RMS each to a pair of subwoofers.

You can always find a place for this amp in your system, and Alpine made this amp so small — 40% smaller than the previous model — it can fit almost anywhere.

Thermal protection without annoying shut-downs

The MRV-F300 uses a technology called Enhanced Shutdown Performance, which rolls back the output a bit when the amp threatens to overheat from playing at its limits too long. Instead of shutting down completely, it continues playing your music, until it cools enough to return to full power.

Convenient features

High- and low-pass filters put you in command of the frequencies that reach your speakers, while a bass boost lets you apply some extra low-end punch. The amp includes preamp- and speaker-level inputs, so you can install it in almost any vehicle, even one with a factory radio. If you're using the speaker-level inputs, the amp senses an incoming signal and turns itself on, eliminating the need to run a turn-on wire back to your vehicle's receiver or fusebox. If you're a tweaker, you'll appreciate the end-piece terminal covers that can be snapped in and out without the need for any tools.

Alpine MRV-F300

Alpine MRV-F300 input and control panel

Note: Sorry, Crutchfield cannot ship Alpine products to Guam or Puerto Rico.

Product Highlights:

  • 4-channel car amplifier
  • 50 watts RMS x 4 at 4 ohms (75 watts RMS x 4 at 2 ohms)
  • 150 watts RMS x 2 bridged output at 4 ohms (4-ohm stable in bridged mode)
  • CEA-2006 compliant
  • variable high- and low-pass filters (50-400 Hz, 12 dB/octave)
  • selectable bass boost (+12 dB at 50 Hz) on channels 3 & 4
  • MOSFET power supply
  • preamp and speaker-level inputs
  • Remote Sensing automatic turn-on when using speaker-level inputs
  • gold-plated screw terminals
  • fuse rating: 40A x 1
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 8-1/4"W x 2-3/16"H x 7-15/16"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Alpine MRV-F300 Reviews

Average Customer Review:

28 Reviews

Exactly What I Expected

Written by: joebowlga from kennesaw, GA on February 5, 2016

This is exactly what I expected from Alpine... the MRV-F300 is a very inexpensive 4 channel amplifier with great sound and reasonable power.

Pros: inexpensive, good sound and reasonable power for the price.

Cons: no pre-out for 2nd amplifier.

At First They Laughed

Written by: ChrisH from indianapolis, IN on January 24, 2016

Crutchfield Customer Review (What's this?)

I'd slowly built up my car audio system with speaker components from Crutchfield but the system was lacking something. It was time to amp it up. Unboxing the Alpine unit in front of my family, they rolled their eyes and yes, there was even laughter. "What's dad doing now," joked my daughter. Then came the installation. They left me to my car and my garage and my silly ideas - so they thought. Hooked up, installed, and system tuned, it was time to take them all for a drive. They jammed, they rocked, they couldn't believe it. Who's laughing now?

Pros: Easy install, looks sharp, and allows me to set my front and rear LR speaker independently and set my crossover points on each.

Cons: More my fault...I first bought the single long audio cable and cut it into four long strands to run from the rear of my car to the front. Ditched that (messy and not enough cable) and opted for the 20-ft 9-wire which made install easy and clean.

Great Amp

Written by: Anonymous from Cleveland, Ohio on January 6, 2016

Crutchfield Customer Review (What's this?)

This amp really makes my alpine speakers sounds great. The amp may be small but it packs quite the punch.

Pros: Size, sound, easy install

Cons: None

Alpine MRV-F300

Written by: RobK from Sacramento, Ca on December 20, 2015

Crutchfield Customer Review (What's this?)

This amp has a compact footprint and packs a punch. Installed in an 88 for Ranger, connected to an Alpine head unit CDE-153BT, the amp is powering 5" infinty primus PR5002is in the doors and a Rockford sub R2S-1x10 prefab low profile box behind the seat. Truck is a standard cab. This setup is very loud and sounds great!

Pros: Size, quality, sound delivery and reputation.

Cons: None

Alpine Power

Written by: Chuck B from Georgia on December 8, 2015

Crutchfield Customer Review (What's this?)

First time running a 4 ch. and the sound over factory or aftermarket head units 18 watts rms is awesome. Hear things in favorite songs you've never heard before! Granted this is 50x4 and my speakers are 80 rms so I am coming up a little short but man you can't tell! Chose this one because of price. Picked up with a whole new system so I was trying to be frugal. Another great product from Alpine!

Pros: Size,quality, trusted brand

Cons: None

Great buy

Written by: Garrett from Austin, TX on October 6, 2015

Crutchfield Customer Review (What's this?)

This amp was perfect for what i needed. It has more than enough power and fit great underneath the passenger seat of my 2015 jeep wrangler.

Pros: Great size, awesome power, plus the harness adapter saved a lot of headache when hooking up to a stock head unit

Cons: None

Alpine MVR

Written by: Alpine amp from Florida on September 2, 2015

Crutchfield Customer Review (What's this?)

I have always upgraded every car stereo that I have ever owned. This amp was easy to install and also easy to tune. I have it hooked to the factory head unit in a 2015 Tacoma. The amp is pushing 4 Polk 6 1/2" and 2 Polk tweeters. I also added a 100 watt Bazooka tube. It really made a world of a difference. The truck sounds sweet. The amp easily fit under the front seat and packs quite a punch. I would recommend it to anyone.

Pros: The size, the power, and the ease of installation and tuning.

Cons: None

Good amp, Good price!!!

Written by: ShaneT from North Carolina on August 13, 2015

Crutchfield Customer Review (What's this?)

This is a great little amp from a reputable manufacturer. I installed this with no problem under my drivers side seat in my Tacoma DoubleCab. Plenty of flexibility for running different setups and easy tuning . I am using this amp to run Polk Audio DB 6 1/2 components up front and Polk Audio DB 6 1/2s in the rear. The setup rocks!!!! If you're looking at this amp just go ahead and buy it you won't regret it.

Pros: Cost, size, trusted name

Cons: not really any so far

Great Little Amp

Written by: Mallen from Ohio on August 7, 2015

Crutchfield Customer Review (What's this?)

Very nice quality, no noise just clean sound.

Pros: Nice and small, good power.

Cons: None

Great product for the price

Written by: Tom from Massachusetts on July 20, 2015

Crutchfield Customer Review (What's this?)

Picked this up to pair with a Kenwood DDX392 and the stock speakers in my 2012 Tundra DC. I was looking for something that could add a little pop to my stock speakers without breaking the bank. This is everything I needed and then some. Just adding this and the HU has made my stereo sound insanely good. I can't imagine what it'll sound like with better speakers.

I'm not as savvy as I was 20 years ago with car audio, so I can't go into specs and settings. If you're looking to add a little extra to your system, I would highly recommend this unit.

Pros: Small footprint Easy installation Price

Cons: None yet


Written by: Lee L from Nebraska on July 17, 2015

Crutchfield Customer Review (What's this?)

Can not beleave the Sound Quality. Loud and clear.??

Pros: Awesome and would recommend it to anybody . Well worth the price. Sound is so much better with amp the just radio & everyone should use amp with there radio it just sounds so much better that way!

Cons: None

Alpine MRV-F300 Reviews

Written by: Joe M from Florida on June 29, 2015

Crutchfield Customer Review (What's this?)

easy hook up, sounds great



Awesome Amp

Written by: kevinT from Wyoming on June 22, 2015

This is an excellent Amp, fits under my seat. The sound is clean and powerful. Much Much better than my previous amp. Well worth the price. Have had it in my car for a year. Have the amp set at about 40%. The it is clean at any volume. I would highly recommend it!!



nice amp

Written by: shredhead1080 from Maryland on June 1, 2015

Crutchfield Customer Review (What's this?)

This is a very nice amp, does the trick, sounds good, and was easy to install. Caution, if you use larger than 8 gauge wiring, it will not fit in the terminals so you'll need a gauge reducer which Crutchfield does not sell. Make sure you get a good quality wiring kit. Lots of companies lie about the gauge of wire they are selling so watch out. Alpine themselves do not sell a wiring kit unfortunately. When installing, use bare wires no spade connectors etc. other than with the power wire itself, where I thought you get a more solid connection since it is higher gauge.

The way I used this was to hook up a set of separates for the front and use the other two channels bridged for a sub. In my case the sub was a single 4 ohm speaker (Bazooka tube) rated right at 150 watts like the amp is. I did not use the high or low pass because the head unit has this functionality. You do not want to set the crossover points on both the amp and the head unit as it could introduce distortion at the crossover frequencies.

If you are looking at Crutchfield's site and thinking the price is higher than other resellers, know that there are counterfeit goods out there and also that there may be B stock or refurbished masquerading as new. Best bet is to stay with an authorized Alpine reseller such as Crutchfield.

Pros: sounds great, priced right, Crutchfield provides good tech support if you need it.

Cons: none I can think of

Impressive Little Amp

Written by: K from Brokenfridge, Colorado on May 12, 2015

Crutchfield Customer Review (What's this?)

At the suggestion of the crutchfield rep, I paired this amp with some db571 speakers and am pleasntly supprised with the results.

Pros: Much smaller than previous generation amps, good clear sound that doesn't distort when you crank the volume, infact it gets painfully loud arount 13-17 on my pioneer head unit

Cons: Doesnt make toast

Alpine MRV-F300

Written by: Anonymous from Ashburn, VA on May 4, 2015

Crutchfield Customer Review (What's this?)

I used this amp to power 4 Rockford fosgate midrange speakers. It fits perfectly under my driver seat and isn't noticeable at all.



Alpine MRV-F300

Written by: mrk from Nevada on April 27, 2015

Crutchfield Customer Review (What's this?)

I have installed many amps over the years, this is by far the easiest to install! If that were not enough, the amp is incredible! Very versatile, nice set of filters. To keep it very short and sweet this amp also sounds as clean and potent as any other amp I have ever used. Fine product. Highly recommended.

Pros: Very small foot print. Way more power than expected! Nice built in x-over and gain controls.

Cons: Yeah amp is that good!!!

Great Sound, Small Space

Written by: Fern&o from Aliso Viejo, CA on April 24, 2015

Crutchfield Customer Review (What's this?)

I had little space for an amp but wanted big sound for. This amplifier was perfect. Sounds great and doesn't run hot. Which allowed me to tuck it under the trunk board near the spare tire.

Pros: Don't need much space. Sounds great. Lots of power.

Cons: None I can think of.

Great Amp!!

Written by: SheldonC from Arizona on March 30, 2015

Crutchfield Customer Review (What's this?)

Great Amplifier!! Installation was a little involved but took me about a day to complete. Works great



Alpine amp

Written by: Charles from Salem, OR on March 29, 2015

Crutchfield Customer Review (What's this?)

This amp is awesome.

Pros: Easy to hide. Easy to install.


Alpine MRV-F300

Written by: Steve from North Carolina on March 25, 2015

Crutchfield Customer Review (What's this?)

This amp fits perfectly under my 2013 ford escape's rear seat for a clean look. It provides sufficient power to my 4 speakers, for a clean & rich sound.

Pros: Easy to Install, inclusion of speaker wire inputs in addition to RCA

Cons: None noted so far

Great amp

Written by: drews from va on January 2, 2015

Crutchfield Customer Review (What's this?)

Easy to install. Clear directions.



Great Product

Written by: Anonymous from NJ on September 15, 2014

Plenty of power. Goes louder than you care to listen to. Performs great at all volumes and music styles.



Alpine MRV-F300

Written by: Anonymous from herndon pa on August 20, 2014

Crutchfield Customer Review (What's this?)

seems like a nice amp so far

Pros: easy hook up like the way it turns on thru the speakers


great amp for the price

Written by: Anonymous from langhorne, PA on March 29, 2014

Crutchfield Customer Review (What's this?)

For the price it is a great simple 4 channel amp. Takes ups little room in my jeep wrangler under my rear seat. doesn't over heat easily. Puts enough power to all of my speakers(Polk) and gives them more clarity and base

Pros: Price, size, performance, resistance to over heating

Cons: None that I can think of see or hear

MRV-F300 Surprisingly powerful

Written by: Protechnician from Winchester, CA. on February 27, 2014

When I un-boxed this amp I'll admit that I was dubious about the power rating. Now all I can say is WOW! I have it's older brother (MRP-F300) installed in my wife's car and that amp is great (I have it running all 4 of her speakers and the sub-woofer) and her system sounds awesome! The MRV-F300 amp is almost 1/2 the size of the MRP-F300 but I thinks it's actually a bit more powerful. The power output seems to be constant over the entire frequency range. Don't shy away from the class D in the description. It is a digital amplifier and the sound is incredible. It actually overpowers my Alpine S-Type 12 inch sub (channels 3 and 4 bridged to 150w RMS) when compared to the Sony XM-1S dedicated mono sub amp that I was using before. Still tuning my system but I'm very happy with this unit and I'm sure you will be, too.

Pros: 1. Very small form factor (~8"x8"). 2. Seems to have plenty of power (even for a 12" Alpine type S sub-woofer in a sealed box). 3. Power output seems to be constant over the entire frequency range. 4. Digital amplifier = great sound

Cons: None


Written by: DLW from Arlington, TX on January 12, 2014

Small. Clean. Easy to install. Plenty of power. I've got this amp powering a set of Boston Acoustics Pro 5.5s and 6.5s. Although these speakers can handle as much as 400 watts rms, this amp does enough to get them PLENTY loud AND clean. It fits under my seat and doesn't even warm up at highly sustained volume levels. Entry level amp? I'd like to think not!

Pros: Size, more power than advertised, nice design

Cons: Wish I had some, but I'm satisfied with what I got

alpine amp

Written by: ron p from bremerton, wa on June 24, 2013

Crutchfield Customer Review (What's this?)

easy to install, works great. instructions very clear even for a beginner

Pros: small compact and versitile


Hands-on research

What's in the box?

Download owner's manual

  • 4-Channel amplifier
  • 40 amp ATO fuse (installed)
  • 7.5" Speaker-level input harness
  • 2 Snap on terminal covers
  • Four 3/4" Self-tapping hex-head screws
  • Owner's manual (English/ French/ Spanish)
  • Alpine Verification Certificate
  • Warranty information
  • On-line product registration information

Product Research


CEA-2006 Compliant: CEA-2006 is a system of testing and measurement methods for mobile audio amplifiers. This voluntary standard advocates a uniform method for measuring an amplifier's RMS power output and signal-to-noise ratio. The criteria for measuring power uses a DC input voltage of 14.4 volts and the RMS power output is measured with 1% or less Total Harmonic Distortion plus noise (THD+N) over a frequency range of 20 Hz to 20 kHz (for full range amplifiers). Signal-to-Noise ratio is measured in weighted absolute decibels (dBA) at a reference of 1 watt into 4Ω. CEA-2006 allows consumers to compare car amplifiers and receivers on an equal basis. Using CEA-2006 criteria, the Alpine MRV-F300 is rated as follows:

  • Power Output:
    • 4Ω: 50 watts x 4-channels (<0.08% THD+N)
    • 2Ω: 75 watts x 4-channels (<0.1% THD+N)
  • Signal to Noise Ratio: 81 dBA (98 dB at rated power)

Bridgeable: Both the front and rear sections of the MRV-F300 are bridgeable, so it can be used as a 4-channel, 3-channel, or 2-channel amp.

Note: When bridging the amp, Y-adapters should be used to feed identical signals the channels to be bridged together.

Speaker Level Input: A speaker level input harness is included, making it easier to add the amplifier to a factory radio or to a receiver with no preamp outputs. The 8-pin harness has inputs for front and rear speakers.

Auto Turn-on: If using the speaker level input, an automatic circuit turns the amplifier on when it senses an input signal.

Controls: The front and rear sections of the amplifier (labeled Channel 1/2 and Channel 3/4) have independent gain and crossover controls. Channel 3/4 also adds a Bass EQ switch:

  • Channel 1/2:
    • Gain: rotary dial; continuously variable from 200mV-4V using the preamp inputs or 500mV-10V using the speaker level inputs
    • Crossover Mode: three position switch; Off (full range), High Pass, or Low Pass
    • Crossover Frequency: rotary dial; variable from 50 Hz to 400 Hz
  • Channel 1/2:
    • Gain: rotary dial; continuously variable from 200mV-4V using the preamp inputs or 500mV-10V using the speaker level inputs
    • Crossover Mode: three position switch; Off (full range), High Pass, or Low Pass
    • Crossover Frequency: rotary dial; variable from 50 Hz to 400 Hz
    • Bass EQ: two position switch; On/Off; adds +12dB boost centered at 50 Hz


  • Battery: set screw terminal; accepts up to 8 gauge wire
  • Remote: set screw terminal; accepts up to 8 gauge wire
  • GND (ground): set screw terminal; accepts up to 8 gauge wire
  • Speaker Outputs: four pair of set screw terminals; accept up to 10 gauge wire
  • Line Inputs: 2 pair of stereo RCA jacks
  • Speaker Level Input: Molex plug input for supplied 8-pin harness

Note: Alpine recommends 8 gauge power and ground wire (minimum).

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Product reviews from the Crutchfield Labs

Alpine made their V-Power amps 40% smaller for 2013, so they'll fit in more places than ever. Plus they employ some smart technology called Enhanced Shutdown Performance, which rolls back the...

What are the Labs?

Customer Q&A

Crutchfield asked  
Why did you buy this?

best amplifier brand to go with my pioneer nex head unit [ edmund  Dec 26, 2015 ]

7 questions already asked

I would suggest that you could use two speakers and agree that the wire would increase the impedance. My daughter loves this amplifier and now wants a sub and additional Alpine amp. I hope you enjoy your purchase. [ FRED  Dec 14, 2015 ]
In between the 2 ohm and 4 ohm rating a don't remember what it puts out [ hami310  Dec 14, 2015 ]
Should be 150 watts per speaker [ Justin  Dec 14, 2015 ]
Your question has a couple different parts to it. First It is unlikely that your wire is 1 ohm. It would take about 150 feet of 18ga wire to be 1 ohm. So you are probably just slightly over 3 which would put you half way between the 4 ohm power rating (50W) and 2 ohm (75W) so somewhere around 62W. That assumes unbridged. If you're planning on bridging it with 3 ohm speakers that would be equivalent to a 1.5ohm unbridged load and could cause the amp to shut down. [ Guy  Dec 13, 2015 ]
Thanks for your question. For information on selecting the best sub for your amp I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the models and help you make the best choice for your system. [ Krissy  Nov 29, 2015 ]  Staff
Thanks for your question. For information on selecting the best amp for your speakers I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system. [ Krissy  Nov 17, 2015 ]  Staff
I forwarded your question to an Advisor and they responded with the following: For the Alpine MRV-F300 50W x 4 Car Amplifier you will need a 40 amp fuse or larger. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Krissy  Jan 22, 2015 ]  Staff
No, this is a class D 4 channel amplifier. However it can be bridged to run 2 channels to 2 woofers, or - as I have done - you can have front 2 channels @ 50 watts each and the other pair bridged to woofer. I have it hooked up to 2 6" polk 2 way door speakers, and the rear channel bridged mono to my Rockford fosgate 10" woofer. And it really ROCKS !! [ Daniel  Jun 08, 2014 ]
This is a four channel amp (2 stereo pairs) and you can bridge either pair to get mono. I'm not entirely sure what you mean by block. I run a setup with 3 way separates on 2 of the channels and have the other two bridged to run a dual 12" sub at 4 ohms in mono. It does the trick. [ Charlie  Jun 05, 2014 ]
no [ GARY L  Jun 05, 2014 ]
No this is not a mono block amp. This amp Handles up to 300W maximum power @ 4 ohms bridged (150 x 2) Up to 75W RMS power per channel @ 2 ohms and up to 50W RMS power per channel @ 4 ohms. The mono-block version is the Alpine MRV-M500 [ Michael  Jun 05, 2014 ]
Thanks for your question. For information on comparing two or more models I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences and help you make the best choice for your system and your budget. [ Krissy  Apr 11, 2014 ]  Staff