Specials Outlet
Alpine MRP-F450 4-channel car amplifier 
70 watts RMS x 4

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.
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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-F450 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 bridge the output and get a pair of subs thumping with 200 watts of power each. 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.

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Details:

  • 4-channel car amplifier
  • 70 watts RMS x 4 at 4 ohms (100 watts RMS x 4 at 2 ohms)
  • 200 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, 24 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
  • preamp outputs
  • gold-plated screw terminals
  • fuse rating: 25A x 2
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 13-1/4"W x 2-3/8"H x 9-9/16"D
  • warranty: 1 year

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

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Alpine MRP-F450

4-channel car amplifier
70 watts RMS x 4

Item #500MRPF450
DISCONTINUED

This item is no longer available to purchase. Contact us for other options.

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Recommended Accessories

Wiring Kits
Wiring Kits
Kits make it easier and less expensive to install your new amplifier. Kits include power cable, a fuse, fuse holder, ground cable, turn-on lead, and more. Note: Wiring not included with the amp.
RCA Patch Cords
RCA Patch Cords
The recommended wiring kits only include one pair of patch cords, but you'll need two for your 4-channel amp.
Capacitors
Capacitors
Protect your charging system and improve your bass with a capacitor. Ground cable and connectors required (not included).
Speaker Wire
Speaker Wire
Bring the music from your amp to your speakers.
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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