Alpine MRP-F250

4-channel car amplifier
40 watts RMS x 4

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Item# 500MRPF250

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Our take on the Alpine MRP-F250

by Ken Nail

Outstanding audio performance — you expect it when the amp is an Alpine. Alpine's V-Power amplifiers supply the high level of performance you want without shaking loose too much of your hard-earned cash.

The versatile MRP-F250 4-channel amplifier can take on a variety of roles in your system. Drive your front and rear speakers in 4-channel mode, or switch to 2-channel mode to power a couple of small subs. Want the best of both worlds? Use channels 1 and 2 to power full-range speakers, and bridge channels 3 and 4 to power a sub. Any way you use it, this amp will impress you with its strong sonic performance.

Variable high-pass/low-pass filters let you adjust the frequency output for either full-range speakers or a sub. If you're driving a subwoofer and using the low-pass crossover, a subsonic filter eliminates inaudible, ultra-low bass notes for cleaner output.

The amp's rugged construction ensures reliable performance. A heavy machined-metal heatsink keeps the internal parts cool and distortion low. Gold-plated screw terminals resist corrosion that can degrade signal performance.

Highlights:

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, channels 3 & 4 only)
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
8-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
warranty: 1 year
Our 60-day money-back guarantee

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

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...	40 x 4
Peak Power Output (Watts x Channels) Loading...	---
Power at 2 Ohms (Watts x Channels) Loading...	50 x 4
Bridged Power (Watts x Channels) Loading...	100 x 2
Minimum Impedance Bridged Loading...	4
Minimum Impedance Unbridged Loading...	---
Best Frequency Response Loading...	10-50k Hz
THD at Rated RMS Power Loading...	1%
Signal to Noise Ratio Loading...	80 dB
Input Voltage Loading...	14.4v
Features
Amplifier Class Loading...	AB
Low-Pass Crossover Frequency Loading...	50-400 Hz
Low-Pass Slope (dB/octave) Loading...	12 dB
High-Pass Crossover Frequency Loading...	50-400 Hz
High-Pass Slope (dB/octave) Loading...	12 dB
Bass Boost Loading...	12db
Bass Boost Frequency Loading...	50 Hz
Fan Cooled Loading...	No
Fuse Rating Loading...	15 x 2
Speaker Level Inputs Loading...	Harness
Preamp Outputs Loading...	1 pair
Width (inches) Loading...	11-1/4
Height (inches) Loading...	2-3/8
Depth (inches) Loading...	9-9/16
Parts Warranty Loading...	1 Year
Labor Warranty Loading...	1 Year

Product Research

What's in the box?

Download owner's manual

4-Channel amplifier
8" Speaker-level input harness (with 8-pin Molex plug on one end and bare wire on the other end)
2 Terminal covers
4 Self-tapping hex-head screws (M4 x 20)
4 Machine screws for securing terminal covers (M3)
Owner's Manual (English/French/Spanish)
Customer Care Registration card

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
Inputs and Outputs

Features

Power Supply: The MRP-F250 amplifier's power supply uses MOSFETs to convert DC battery voltage to the higher DC voltages needed for high power. It supplies positive and negative voltages around 0V, rather than around 6V as with conventional single-polarity power supplies. The result is higher power levels and a dynamic range wider by as much as 10dB.

Gain Controls: This amp has independent front and rear channel gain controls.

Crossovers: Both front and rear channels have independently selectable high-pass and low-pass variable 50-400 Hz crossovers with a slope of 12dB/octave.

Subsonic Filter: This amp utilizes a 15Hz subsonic filter to eliminate super low frequencies that can rob power and damage speakers. The subsonic filter operates only for the rear channels, and is engaged when the rear channel crossover is set to "low-pass" operation.

Bass EQ: The Bass EQ circuit provides a fixed boost of 12dB at 50 Hz for the rear channels only. The Bass EQ does not function when the amp's rear-channel crossover is set to "high-pass" operation.

Inputs: The amplifier offers both line-level and speaker-level inputs for 4 channels. The supplied speaker-level input harness allows you to connect this amplifier to a receiver without preamp outputs, either aftermarket or factory.

Line Outputs: This amplifier has a pair of non-fading stereo RCA line outputs. You can use these outputs to daisy-chain another amplifier without having to run additional signal cables from the receiver.

Terminal Cover: The amp comes with two plastic covers that protect and insulates the RCA, power, and speaker connections. Four supplied machine screws attach the cover to the amplifier.

Inputs and Outputs

Left Side Of Amplifier:

GND (ground): Gold-plated terminal strip, 0.35" wide
Battery: Gold-plated terminal strip, 0.35" wide
Remote: Gold-plated terminal strip, 0.35" wide
Speaker Outputs: Gold-plated terminal strips for 4 speakers, 0.35" wide

Right Side Of Amplifier:

Line Inputs: 2 pairs of gold-plated stereo RCA jacks
Line Outputs: 1 pair of gold-plated stereo RCA jacks
Speaker Level Input: Molex plug input for supplied 8-pin harness

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1-10 of 35 items >> Sort Results By: Date Reviewed | Rating | Helpfulness

5 out of 5

Alpine f250

Written By Pat, San Francisco Bay Area on Friday, March 06, 2009

This is a very compact amp, easy to set up and very flexable for adding to it. This combined with my 9874 head unit and Alpine 6x9 behind the seat and 6 1/2 in the kick panels of my 62 Ranchero rock, my 19 year old daughter says its too loud, how can that be???

Very pleased with this amp.