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Mono subwoofer amplifier 250 watts RMS x 1 at 2 ohms
Item # 500MRVM250 | MFR # MRV-M250
Outlet Savings: -$15.00
$134.99 Earn up to 135 Rewards points
Offers & Financing
Our take on the Alpine MRV-M250 by Crutchfield's Buck Pomerantz
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.
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.
MRV-M250 input and control panel
Purchased this amp to power a 12" Alpine type E for a stock stereo in a 2007 Focus. Fit nicely under the drivers seat. Perfect amount of bass.
What's in the Box:
- 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
- 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
Alpine MRV-M250 Reviews
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Features and Specs
|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|
|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|
|Speaker Level Inputs||Harness|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
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.
- 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).
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
by Zak Billmeier
Alpine's V-Power car amplifiers are smaller than ever, and they employ smart digital technology that makes them incredibly versatile.
Why did you buy this?
Matches my sub woofer and has speaker level input that does not require remote line. [ Maverick Jun 08, 2016 ]
Size, output, match system. [ Chris Apr 27, 2016 ]
I like Alpine stuff [ Jeffrey Feb 06, 2016 ]
Matched component with Alpine SWS-12D2 subwoofer speaker. [ John Dec 30, 2015 ]
Was strongly considering the 500w model, but this is just to enhance the factory system, no need to drown everything else out. [ Rhett Dec 14, 2015 ]
4 questions already asked
I use the auto feature through the amp turn on through my head unit and so far I haven't come out to a dead battery [ ZACHARY Sep 16, 2016 ]
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings/connections on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer. You can also post your question in our forums: http://community.crutchfield.com. Or try our online support center: http://crutchfield.custhelp.com/app/answers/list/kw/. [ Kenny Sep 09, 2016 ] Staff
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 Apr 22, 2014 ] Staff
this is a mono amp. you would not use it for door speakers, you would use it for a subwoofer. look at 2 channel amps. [ Jason Apr 22, 2015 ]
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 Jan 10, 2014 ] Staff