Our take on the Alpine MRV-F345

by Ken Nail

Choose an Alpine V12 amp for excellent audio quality and outstanding watt-per-dollar value. With many of the same high-grade components used in Alpine's flagship F#1 lineup, these amps have the flexibility for system building and the backbone for non-stop power output.

The MRV-F345 4-channel amp produces 75 watts RMS per channel — perfect for driving most component systems or high-quality coaxial speakers. The clean power output allows the speakers to produce the fine detail and nuance that'll separate your system from the rest of the pack. In bridged mode, the versatile MRV-F345 delivers 300 watts from channels 3 and 4 (perfect for running a sub), while you can use channels 1 and 2 to drive the front speakers.

Alpine's Amp Link lets you connect this amp to compatible Alpine receivers with a single cable, providing a clean 4-volt signal to the amp. Amp Link also allows you to make many amp adjustments from your Alpine receiver, so fine-tuning your system is easier than ever.

You'll find the set of preamp outputs convenient for routing the signal to another amplifier in your system. The extra-large wiring terminals will let your bass really hit, since heavy-gauge power and speaker wires let the power move more efficiently into and out of the amp.

Highlights:

4-channel car amplifier
75 watts RMS x 4 at 4 ohms (150 watts RMS x 4 at 2 ohms)
300 watts RMS x 1 (channels 3/4 only) in bridged mode
Amp Link allows single cable connection for signal and control with compatible Alpine receivers
2-, 3-, or 4-channel output
CEA-2006 compliant
Tri-way capable (Tri-Way crossover required)
variable low- and high-pass digital filters, 30-400 Hz or 600-8000 Hz at 12 dB/octave
bass boost (0-16 dB in 2 dB steps, centered at 45 Hz)
MOSFET power supply
STAR Topology (minimizes internal noise and prevents ground interference)
preamp-level inputs and outputs
oversized power and ground connections with gold-plated screw terminals
top mounted controls with cover
detachable front cover
blue power LED
requires 8-gauge power and ground leads — wiring and hardware not included with amplifier
dimensions: 13"W x 2-7/16"H x 9"D
warranty: 1 year
Our 60-day money-back guarantee

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

Features and specs chart | What’s in the box? | In-depth notes

Features and Specs

Performance
RMS Power Output (Watts x Channels) Loading...	75 x 4
Peak Power Output (Watts x Channels) Loading...	N/A
Power at 2 Ohms (Watts x Channels) Loading...	150 x 4
Bridged Power (Watts x Channels) Loading...	300 x 1
Minimum Impedance Bridged Loading...	4
Minimum Impedance Unbridged Loading...	2
Best Frequency Response Loading...	10-50k Hz
THD at Rated RMS Power Loading...	0.3%
Signal to Noise Ratio Loading...	73 dB
Input Voltage Loading...	14.4v
Features
Amplifier Class Loading...	AB
Low-Pass Crossover Frequency Loading...	30-400Hz/600-8kHz
Low-Pass Slope (dB/octave) Loading...	12 dB
High-Pass Crossover Frequency Loading...	30-400Hz/600-8kHz
High-Pass Slope (dB/octave) Loading...	12 dB
Bass Boost Loading...	0-16 dB
Bass Boost Frequency Loading...	45
Fan Cooled Loading...	Yes
Fuse Rating Loading...	30 x 2
Speaker Level Inputs Loading...	No
Preamp Outputs Loading...	1 pair
Width (inches) Loading...	13
Height (inches) Loading...	2-7/16
Depth (inches) Loading...	9
Parts Warranty Loading...	1 Year
Labor Warranty Loading...	1 Year

Product Research

What's in the box?

Download owner's manual

Four channel amplifier with two 30-amp blade fuses and attached control panel cover
Four M4x20 self-tapping screws
4mm Allen wrench
2.5mm Allen wrench
Owners Manual (English/French/Spanish)
Manual corrections
Customer Care Registration/Survey
Output power Verification Certificate

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.

Controls

Top of Amplifier: The amplifier has a metal hood that is removed to reveal the control panel. The control panel consists of the following controls:

Mode: Toggles between menu functions (Amp ID, Input gain, Bass EQ)
Down: Adjusts menu items (down)
Up: Adjusts menu items (up)
CH 1&2 crossover switch: Select high-pass, low-pass, or full-range operation for the CH 1&2 speaker outputs
CH 1&2 frequency control: Rotary control adjusts the crossover frequency from 30Hz-400Hz or 600Hz-8kHz (depending on frequency multiplication switch)
CH 1&2 frequency multiplication switch: Select "x1" for frequency band 30Hz-400Hz or "x20" for frequency band of 600Hz-8kHz
CH 3&4 crossover switch: Select high-pass, low-pass, or full-range operation for the CH 3&4 speaker outputs
CH 3&4 frequency control: Rotary control adjusts the crossover frequency from 30Hz-400Hz or 600Hz-8kHz (depending on frequency multiplication switch)
CH 3&4 frequency multiplication switch: Select "x1" for frequency band 30Hz-400Hz or "x20" for frequency band of 600Hz-8kHz
Input channel selector switch: Select between 1/2, 3/4, and 1+3/2+4

Inputs and Outputs

Front of Amplifier:

Battery (+12 V): Set screw terminal that will accept up to 4-gauge wire
Remote (turn-on): Set screw terminal that will accept up to 8-gauge speaker wire
GND (ground): Set screw terminal that will accept up to 4-gauge speaker wire
Speaker Outputs: Set screw terminals which accept up to 8-gauge wire
Amplifier Link: Connection for Amp Link compatible head units (requires the 500KCE511M cable, sold separately)
RCA Input: Two sets of gold-plated RCA line input jacks
RCA Output: Gold-plated RCA line output jacks

Specifications

CEA-2006 Compliance: The specifications given by Alpine for the MRV-F345 amplifier comply with the new CEA-2006 Amplifier Power Standard from the CEA (Consumer Electronics Association). All manufacturers who comply with the standard can display the CEA-2006 logo on their product.

RMS Power Rating (measured at 14.4V):

Into a 4-Ohm Load: 75 watts x 4
Into a 2-Ohm Load: 150 watts x 4
Bridged Into a 4-ohm Load: 75 watts x 2 and 300 watts x 1

Note: Minimum impedance is 2-ohms stereo.

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1-3 of 3 items Sort Results By: Date Reviewed | Rating | Helpfulness

5 out of 5

Sweet Amp

Written By bigredishott, Palmer MA on Tuesday, April 22, 2008

This Amp is great! The sound quality is amazing! I would never let this amp go.

3 out of 3 people found this helpful

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5 out of 5

Alpine MRV-F345

Written By DONNY, Woodbridge, Virginia on Wednesday, December 21, 2005

I have the MRV-F545 the 125 x 4 version of this amplifier. The reason I am writing a review for this model is because if this amp is half the quality as mine you will not be disappointed. I have mine running two sets of MB Quart 6.5" components and they sound exactly as they should. They amplifier is a big part of why they sound so good. I had them previusly running off of another amplifier of mid-grade quality and after I switched to this amp there is an amazing diference. Other than the sound quality the amp's digital controls make it easy to "dial it in" and it looks very sleek as well.

14 out of 14 people found this helpful

Was this review helpful? Yes | No

5 out of 5

Killer Amp

Written By 4evaLatino, CT on Saturday, July 09, 2005

If you need an amp to power your speakers, look no further. I have this amp powering my two Infinity 6.5 components up front and my Infinity 6 X 9 in the back and they sound great. Amp has looks slick also, small and nicely designed. It's also very easy to adjust the settings. Right now I have it running at about 1/4 the gain and it goes loud without distorting one bit. I've had this amp for about a month now, I wanted to wait a short while before actually rating it so I could see how well it performed and it has passed my expectation. The Alpine V12 are great, they're small and compact but powerful. Surpring how much power this little amp can put out. Bottom Line- If you need a 4 channel amp, look no further !

80 out of 86 people found this helpful

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1-3 of 3 items

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Crutchfield - North America's electronics authority since 1974

Alpine MRV-F345

4-channel car amplifier
75 watts RMS x 4

Item# 500MRVF345 offer details

Review Sumary

Our take on the Alpine MRV-F345

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

Highlights:

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

Features and Specs

Product Research

Our Product Research Team

Product Reviews

Sweet Amp

Alpine MRV-F345

Killer Amp

Learn more about All Car Amplifiers

Learn more about All Car Amplifiers

Car Amplifier Shopping Guide

Everything About Subwoofers from A to Z

Video: Car Amplifier Power

Video: Car Amplifier Channels

Video: Car Amplifier Build Quality

Accessories

Things you'll need

Extras

About Crutchfield

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Alpine MRV-F345

4-channel car amplifier 75 watts RMS x 4

Item# 500MRVF345 offer details

Review Sumary

Our take on the Alpine MRV-F345

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

Highlights:

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

Features and Specs

Product Research

Our Product Research Team

Product Reviews

Sweet Amp

Alpine MRV-F345

Killer Amp

Learn more about All Car Amplifiers

Learn more about All Car Amplifiers

Car Amplifier Shopping Guide

Everything About Subwoofers from A to Z

Video: Car Amplifier Power

Video: Car Amplifier Channels

Video: Car Amplifier Build Quality

Accessories

Things you'll need

Extras

4-channel car amplifier
75 watts RMS x 4