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Kenwood KAC-M1804

Compact 4-channel amplifier — 45 watts RMS x 4

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  • Kenwood KAC-M1804

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  • Kenwood KAC-M1804

  • Kenwood KAC-M1804

  • Kenwood KAC-M1804

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Our take on the Kenwood KAC-M1804

by Buck Pomerantz
Kenwood

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.

Power your speakers on land or sea

Kenwood's KAC-M1804 4-channel amplifier will pump up your car's audio system with 45 watts RMS per channel — that's more than twice the power of most car stereos. The super-compact KAC-M1804 will add new clarity and impact to the basic sound system of almost any kind of vehicle on land or water, and it'll fit in a lot of places when space is tight. The amp uses plastic covers to protect its connections and features a conformal coated circuit board that keeps out moisture and salt, so the party won't stop just because of a little wetness.

Hooks up to almost any system

The KAC-M1804 comes with an RCA cable for connecting to an aftermarket receiver, but it can handle speaker-level signals as well, so you can still get input from a radio without RCA outputs. The amp senses incoming high-level signals and turns itself on, eliminating the need to install a separate remote turn-on wire.

If your receiver's power circuit is protected by a 15-amp or larger fuse (check your fuse box or owner's manual), you can tap into it to power your KAC-M1804. Otherwise, you'll have to run a power wire to the battery and install a 15-amp inline fuse as close to the battery as possible.

Highlights:

  • compact 4-channel amplifier for car, motorcycle, and boat
  • 45 watts RMS (100 watts peak) x 4 at 4 ohms
  • non-bridgeable, 4-ohm stable per channel
  • CEA-2006 compliant
  • MOSFET power supply and Class D amp technology
  • conformal-coated circuit board — suitable for marine applications
  • preamp and speaker-level inputs
  • signal-sensing turn-on on speaker-level inputs eliminate need for a separate remote lead
  • RCA cables and short power/speaker harness included
  • 10-gauge power and ground leads recommended
  • fuse rating: 15A x 1
  • dimensions: 5-1/2"W x 1-5/16"H x 3-9/16"D
  • warranty: 1 year
  • Our 60-day money-back guarantee
Preliminary info from the manufacturer
Features and Specs
Performance
RMS Power Output (Watts x Channels)
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45 x 4
Peak Power Output (Watts x Channels)
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---
Power at 2 Ohms (Watts x Channels)
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---
Bridged Power (Watts x Channels)
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---
Minimum Impedance Bridged
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---
Minimum Impedance Unbridged
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4
Best Frequency Response
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---
THD at Rated RMS Power
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---
Signal to Noise Ratio
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Input Voltage
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Features
Amplifier Class
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D
Low-Pass Crossover Frequency
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50-200 Hz
Low-Pass Slope (dB/octave)
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24 dB/octave
High-Pass Crossover Frequency
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---
High-Pass Slope (dB/octave)
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---
Bass Boost
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Bass Boost Frequency
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Fan Cooled
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Fuse Rating
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Speaker Level Inputs
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Yes
Preamp Outputs
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Width (inches)
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5-1/2
Height (inches)
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1-3/8
Depth (inches)
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3-9/16
Parts Warranty
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1 Year
Labor Warranty
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1 Year
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Kenwood KAC-M1804 Reviews

Average Customer Review:

2 people say:

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Filter by rating:
5 out of 5

Great Amp

Written By Roxy85, Virgilina, VA on Thursday, June 19, 2014
Crutchfield Customer Review (What's this?)
 
Easy to install-very compact. Produces great sound
Pros:
Install was very easy, very compact and water proof.
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

good amp for the $

Written By Eric, whitesburg ga on Saturday, June 14, 2014
Crutchfield Customer Review (What's this?)
 
I bought this amp to boost the sound on my pontoon boat and am very pleased. Sound quality is fantastic. I can run 20 mph and hear my radio now over the water and wind noise. Great amp for the money.
Pros:
Good value
Cons:
none
1 out of 1 people found this helpful
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1 question already asked

My front speakers are only rated for 35 rms and my rears are 55 rms. Since there isn't a way to adjust the gain on this will it hurt front ones since it puts out 45 rms? [ Jeepfreak13  Jul 10, 2014 ]
1 answer
  • I forwarded your question to an Advisor and they responded with the following: It?s perfectly fine to slightly overpower your front speakers, so the 45 watts will work in this application. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Krissy Staff  Jul 11, 2014 ]

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For a more in-depth review and enhanced detailed information on the Kenwood KAC-M1804, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_113KAM1804/Kenwood-KAC-M1804.html ).