Why Choose Crutchfield?
Great gear and expert advice
Our experts help you pick the ideal gear for your needs.Meet our advisors
Free tech support for the life of your gear.Read about our one-on-one expert help
You may return items that are complete and like new for any reason within 60 days.See the details of our return policy
Earn one point for every dollar you spend and use those points to save on future purchases.Get full details on Crutchfield Rewards
Deep discounts on car installation gear
We offer vehicle-specific installation instructions, dash kits, wiring harnesses, and speaker accessories at deeply discounted prices with car stereo and speaker purchases. Available for most vehicles.Learn more
Trusted since 1974
Our customers have trusted us with their business, and they’ve helped us win awards for our service.Check out our most recent awards
The manufacturer’s warranty always applies.See more details
V-Power Series 4-channel car amplifier — 50 watts RMS x 4
Item # 500MRPF300 | MFR # MRP-F300
This item is no longer available.
Our take on the Alpine MRP-F300 by Crutchfield's Buck Pomerantz
V-Power amplifiers deliver the sound quality that made Alpine famous. Highly efficient power supplies housed in sleek black casings guarantee that these amps stand out in performance and appearance. The thermal management system dissipates heat and saves power, so your V-Power amp will run reliably for years to come.
The MRP-F300 4-channel amplifier sends 50 watts RMS to each of your front and rear speakers, or switches to 2-channel mode to power a pair of subwoofers. You can also switch to 3-channel mode, then power a subwoofer with 150 watts RMS while the other two channels power a pair of full-range speakers.
High- and low-pass filters put you in command of the frequencies that reach your speakers, while the bass boost is armed with plenty of low-end punch. Preamp- and speaker-level inputs allow you to connect this amp in almost any vehicle. Let a V-Power amplifier transform the sound of your car's audio system.
Note: Sorry, Crutchfield cannot ship Alpine products to Guam or Puerto Rico.
This was a fantastic product, was open box/scratch dent so I got 30 off retail and it had no scratches at all, this was a flawless product
Aaron, Idaho falls, idabk
What's in the Box:
- Four channel amplifier
- Two 25 amp fuses (installed)
- 7" Speaker-level input harness (8-pin Molex plug on one end and bare wires on the other)
- 2 Terminal covers
- 4 Self-tapping hex-head screws (M4 x 20mm)
- 4 Machine screws for securing terminal covers (M3 x 12mm)
- Owner's Manual (English/French/Spanish)
- Customer Care Registration card
- 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)
- 2-, 3-, or 4-channel output
- variable high-pass/low-pass filters (50-400 Hz, 12 dB/octave)
- selectable bass boost (12 dB at 50 Hz)
- subsonic filter (15 Hz, 18 dB/octave for channels 3 & 4)
- MOSFET power supply
- CEA-2006 compliant
- STAR Topology (minimizes internal noise and prevents ground interference)
- speaker- and preamp-level inputs
- gold-plated screw terminals
- fuse rating: 25A x 2
- 8-gauge power and ground leads recommended wiring and hardware not included with amplifier
- 10-11/16"W x 2-7/16"H x 9-9/16"D
- warranty: 1 year
- Our 60-day money-back guarantee
Alpine MRP-F300 Reviews
Average Customer Review(s):
Thanks for submitting your review
Features and Specs
|RMS Power Output (Watts x Channels)||
50 x 4
|Peak Power Output (Watts x Channels)||N/A|
|Power at 2 Ohms (Watts x Channels)||75 x 4|
|Bridged Power (Watts x Channels)||150 x 2|
|Minimum Impedance Bridged||4|
|Minimum Impedance Unbridged||2|
|Best Frequency Response||20-20k Hz|
|THD at Rated RMS Power||1%|
|Signal to Noise Ratio||80 dB|
|Low-Pass Crossover Frequency||50-400 Hz|
|Low-Pass Slope (dB/octave)||12 dB/oct|
|High-Pass Crossover Frequency||50-400 Hz|
|High-Pass Slope (dB/octave)||12 dB/oct|
|Bass Boost||+12 dB|
|Bass Boost Frequency||50 Hz|
|Speaker Level Inputs||Harness|
|Preamp Outputs||1 pair|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
Power Supply: The MRP-F300 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.
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; 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 Covers: The amp comes with two plastic covers that protect and insulate the RCA, power, and speaker connections. Four supplied machine screws attach the covers to the amplifier.
Gain Controls: This amp has independent front and rear channel gain controls.
Crossovers: Both front and rear channels have independent high-pass and low-pass crossovers. The crossover points are continuously variable from 50-400 Hz and the slope of both is 12dB/octave. Each set of channels has a high-pass/low-pass/off switch.
Subsonic Filter: This amp utilizes a subsonic filter at 15Hz to eliminate super low frequencies that can rob power and damage speakers. The subsonic filter operates at all times; it cannot be turned off.
Bass EQ: The Bass EQ circuit provides a fixed boost of 12dB at 50 Hz for the rear channels only. The Bass EQ can be turned off and does not function when the amp's rear-channel crossover is set to high-pass operation.
Left Side Of Amplifier:
- GND (ground): gold-plated screw terminal, 0.33" wide
- Battery: gold-plated screw terminal, 0.33" wide
- Remote: gold-plated screw terminal, 0.33" wide
- Speaker Outputs: gold-plated screw terminals (8), 0.33" wide
Note: Alpine recommends 8 gauge power and ground wire (minimum).
Right Side Of Amplifier:
- Line Inputs: 2 pair of gold-plated stereo RCA jacks
- Line Output: 1 pair of gold-plated stereo RCA jacks
- Speaker Level Input: Molex plug input for supplied 4-pin harness
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.
4 questions already asked
I put my unit in the trunk, and made a custom mount to mount it elevated from the trunk floor. [ MICHAEL Nov 15, 2015 ]
Usailly in a truck its behind the back seat against the rear wall which requires removing the seat. [ ANDREW R Apr 10, 2014 ]
I mounted mine under the seat but it was a bench seat [ KRISTOPHER Apr 10, 2014 ]
1 answer I have a 1998 Chevy Tahoe that has 3 pairs of speakers: front, rear passenger and cargo area. I want to power all speakers and also use the SUB out from the amp to power my power tube. What would be the best speaker wiring to take advantage of all the speakers? Would i tie the front and rear passenger together or the rear passenger and cargo area together? [ sfrank Mar 11, 2014 ]
I forwarded your question to an Advisor and they responded with the following: That will depend on the power handling of the speakers, but in this setup I would suggest wiring the rear speakers in series off one another. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Krissy Mar 15, 2014 ] Staff
Chris L ...Although I used this amp in 4 channel mode, you can use it for 3 channels. I sold the vehicle along with all the manuals so, I am going off memory here and countless other installs over the years. I'm going to assume you will be using this amp to power a pair of full range or component speakers and a sub If that is the correct scenario you will hook your full range/ component speaker pair to channels 1&2. Make sure you wire them up as the diagram states on the end of the amp. Meaning ...left speaker +- to left speaker and right speaker +- to the right speaker. Channels 3 &4 will be combined to make your 3rd channel. This is called bridging which essentially doubles the power output going to your sub. There should be a diagram on the side of the amp showing you how to make these "bridging" connections. Basically you will be taking the positive and negative speaker wire from your sub and hooking one of the wires to the positive or negative terminal on channel 3 and the other wire to the negative or positive terminal on channel 4. Always try to hook negative to negative and positive to positive. Hope this helps [ BRIAN K Dec 26, 2013 ]
Couldn't you simply bridge 3 & 4 together? [ MICHAEL Dec 17, 2013 ]
Yes it can. 2/3/4 channel capability. 2 channels bridged to one mono channel, the other 2 channels run stereo. Built in filters for subwoofer on mono channel. High pass filter for the stereo channels. No problem. [ KENNETH Dec 17, 2013 ]
Extremely easy. This amp was one of the easiest I have installed. [ MICHAEL Dec 17, 2013 ]
Glen don't know, ask crutch field they're very helpful. [ HECTOR M Dec 14, 2013 ]
I had a professional install it. I installed the head unit but when I got the amp I went to a pro and I'm glad I did. He replaced the stock wiring with that I ordered from these guys and did a wonderful job. I didn't know where the wiring channels were. He had to use more than one because of the Guage of the wire. Also ran me a cable in case I ever installed a sub woofer. He also set up the crossover and equipment on the amp for me. Once it's in hard to get to. He also had to Remo e the door panels the back seat and the dash to install in my truck. It was the best 175 dollars I spent. Would have taken me a day or two And I would have had to have someone help. When I put in my Kenwood I also got 4 infinity speakers. They are great. You will be very happy with the amp. It sounds better than anything I have ever heard and I have seen some very good ones. Definitely will need good speakers. That amp will blow any stock speaker out including the bose that come stock. Very clean and clear sound all the way to max volume. You can try the install yourself, I did install the head unit and the speakers but I used factory wiring. With this amp you need heavy Guage to get all it capable of and it's capable of very good things. Go with the pro. You got one of the best there is get everything out of it and you will be as impressed as I was. Mind blowing. [ LUCIAN H Dec 10, 2013 ]