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Alpine MRV-M250

Mono subwoofer amplifier — 250 watts RMS x 1 at 2 ohms

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Our take on the Alpine MRV-M250

by Buck Pomerantz
Alpine

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 Authorized Online Dealer

Compact powerhouse

Alpine makes it a little easier to get great bass in your vehicle, especially if you drive a compact car. Their V-Power Series MRV-M250 mono subwoofer amplifier sends up to 250 watts RMS to your sub, guaranteeing some strong bass on your drive. And Alpine made this amp so small — about the size of an outstretched hand and just over 2" tall — it can fit almost anywhere.

Thermal protection without annoying shut-downs

The MRV-M250 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

A low-pass filter puts you in command of the frequencies that reach your sub, while a bass boost lets you apply plenty of 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 run back to your vehicle's receiver or fusebox. You can control the volume of your MRV-M250 from the front seat with the optional RUX-KNOB remote bass controller.

Alpine MRV-M250

MRV-M250 input and control panel

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Highlights:

  • mono subwoofer car amplifier
  • 150 watts RMS x 1 at 4 ohms (250 watts RMS x 1 at 2 ohms)
  • CEA-2006 compliant
  • variable low-pass filter (50-400 Hz, 24 dB/octave)
  • variable bass boost (0-12 dB at 50 Hz)
  • Class D amp with MOSFET power supply
  • preamp and speaker-level inputs
  • Remote Sensing automatic turn-on when using speaker-level inputs
  • optional RUX-KNOB wired remote level control
  • gold-plated screw terminals
  • fuse rating: 30A x 1
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 7-11/16"W x 2-3/16"H x 7-15/16"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Performance
RMS Power Output (Watts x Channels) 150 x 1
Peak Power Output (Watts x Channels) N/A
Power at 2 Ohms (Watts x Channels) 250 x 1
Bridged Power (Watts x Channels) N/A
Minimum Impedance Bridged N/A
Minimum Impedance Unbridged 2
Best Frequency Response 7-400 Hz
THD at Rated RMS Power 0.2%
Signal to Noise Ratio 85 dB
Input Voltage 14.4v
Features
Amplifier Class D
Low-Pass Crossover Frequency 50-400 Hz
Low-Pass Slope (dB/octave) 24 dB/octave
High-Pass Crossover Frequency N/A
High-Pass Slope (dB/octave) N/A
Bass Boost 0-12 dB
Bass Boost Frequency 50 Hz
Fan Cooled No
Fuse Rating 30
Speaker Level Inputs Harness
Preamp Outputs No
Width (inches) 7-11/16
Height (inches) 2-3/16
Depth (inches) 7-15/16
Parts Warranty 1 Year
Labor Warranty 1 Year
Product Research
What's in the box?

Download owner's manual

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

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 open the box, verify contents, 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.

Features

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-M250 is rated as follows:

  • Power Output:
    • 4Ω: 150 watts x 1-channel (<0.2% THD+N)
    • 2Ω: 250 watts x 1-channel (<0.3% THD+N)
  • Signal to Noise Ratio: 85 dBA (105 dB at rated power)

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. While only two speaker inputs are necessary, wiring all four will minimize the fader's effect on the subwoofer output.

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

Low Pass Filter: The amp is equipped with a 50-400Hz variable low-pass filter with a slope of 24 dB/octave. This being a mono subwoofer amp, the crossover is always engaged.

Bass EQ: The Bass EQ circuit provides a variable boost (0-12dB) at 50 Hz.

Wired Remote: An RJ-25 jack is provided for connecting an optional RUX-KNOB wired remote (item number 500RUXKNOB, sold separately), allowing remote control of the output level of the amplifier.

Connections:

  • Battery: screw terminal; accepts spade connectors or ring terminals up to 0.35" wide
  • Remote: screw terminal; accepts spade connectors or ring terminals up to 0.35" wide
  • GND (ground): screw terminal; accepts spade connectors or ring terminals up to 0.35" wide
  • Speaker Output: screw terminal; accepts spade connectors or ring terminals up to 0.35" wide
  • Line Inputs: 1 pair of stereo RCA jacks
  • Speaker Level Input: Molex plug input for supplied 8-pin harness
  • Wired Remote: RJ-25 jack for optional wired remote

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

 

Product reviews from the Crutchfield Labs (what are the Labs?)

Video: Alpine V-Power Car Amplifiers

Video: Alpine V-Power Car Amplifiers

by Zak Billmeier
 
Video: Alpine V-Power Car Amplifiers

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 output...

 
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Alpine MRV-M250 Reviews

Average Customer Review:

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5 out of 5

Alpine MRV-M250

Written By Shawn, Bay Center, WA on Wednesday, July 02, 2014
Crutchfield Customer Review (What's this?)
 
Very good bang for the buck
Was this review helpful?    Yes | No
 
5 out of 5

Alpine MRV-M250

Written By Mike K, Lake Charles, LA on Saturday, May 31, 2014
Crutchfield Customer Review (What's this?)
 
Great amp!
Pros:
Has more than enough power for my 10!
Cons:
Mite be too much power
Was this review helpful?    Yes | No
 
5 out of 5

So far so good!

Written By S Kusen, Brookhaven, PA on Wednesday, September 04, 2013
Crutchfield Customer Review (What's this?)
 
Bought this for my 2013 Civic LX, and to power a Rockford Fosgate Prime R1L-1X10 sub enclosure, just to add some bass to the stock system. No complaints, and works as desired!
Pros:
lightweight, small
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

Quality Class D for a good price

Written By BoomRattleBoom, Detroit, MI on Sunday, April 14, 2013
 
Installed with a 8awg kit, powering a Polk Dxi108 8" sub. The birth sheet shows the amp tested @ 283 rms in the factory. With my polk rated around 180rms @ 2ohms, this is one of the best matched amps I could find. I have the bass boost off to prevent blowing the sub, and the gain is just over 1/2. It sounds clean, no odd noise, no overheating, and no issues so far.

Powered on first try and have not had any issues with a few days of constant use. It could easily drive a lower power 10" or 12".
Pros:
It's an Alpine, so it is flat black without lame logos all over it. Love that. Fairly cheap for a quality name brand RMS power rating is true RMS Build quality and sound is excellent for this price category. Class D, low heat Tiny in size, easy to mount or hide. No reliability issues so far, from an amp that was just released.
Cons:
-No independent terminal lug for power wire. A crimped/soldered terminal is required. Had to grind my terminal down to size to make it fit in the terminal block, which is not really what I like to do. The power terminal block required smaller ring terminals than is supplied in most 8awg kits, which is the smallest gauge I would use with an amp this size and CCA wires. Not a big deal in this price category, I'm just a perfectionist. -It doesn't make me sandwiches when asked the first time.
9 out of 9 people found this helpful
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2 questions already asked

What amperage do I need from the battery to this amp? [ MRod202  Apr 18, 2014 ]
1 answer
  • I forwarded your question to an Advisor and they responded with the following: This amplifier requires 30 amps from the battery. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Krissy Staff  Apr 22, 2014 ]
How do I install the Alpine mvr-m250 to my doors speakers, I have a jvc deck witch has a out put front and rear and the amp only has one input? [ karlo  Jan 10, 2014 ]
1 answer
  • For details on fit or installation please contact an Advisor by phone or online chat. They will be able to pull up your vehicle and receiver to give you the details on how to connect this amplifier. [ Jeff Staff  Jan 10, 2014 ]

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For a more in-depth review and enhanced detailed information on the Alpine MRV-M250, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_500MRVM250/Alpine-MRV-M250.html ).