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Kicker CX300.4 (12CX300.4)

300W Class D 4-Channel CX Series Car Amplifier

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List price $229.95

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$199.95

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Kicker CX Series Amplifiers

Kicker CX series amplifiers were designed by Kicker's expert audio engineers to bring you plenty of clean RMS power for even the most demanding system. Kicker engineered these amps to be ultra compact, meaning there won't be any monsterous amps that you have to design your system around, they'll fit just about anywhere. The CEA-2006 compliant CX300.4 4-channel amp puts out up to 300 watts of RMS power and is compatible with the Kicker CXRC remote bass controller.

Kicker CX Amps are Incredibly Compact Ultra-Compact Footprint

The Kicker CX1200.1 will fit just about anywhere, whether you want to install it discretely under a seat, hide it in the back of your trunk or mount it somewhere else. This compact amp measures just over 7" wide, 12" deep and comes in at just over 2" tall. With a footprint this small, Kicker optimized the circuit layout for the most efficient use of components possible.


Kicker CX Amps Can be Mounted Nearly Anywhere Mount Anywhere

To take full advantage of the compact footprint, Kicker includes mounting hardware which gives you the option of vertically mounting your CX300.4 amplifier. With this hardware, you can install the amplifier nearly anywhere in your car, whether you're looking for an inconspicuous and out-of-the-way installation or want to mount your amp to show it off.


Kicker CX Amps Feature High Quality Components Staggering Technology

Beneath the high-mass, super cooling UV protected aluminum heatsink Kicker included double-sided fiberglass circuit boards and incredibly efficient Litz-wound transformers. Externally, the CX300.4 4 channel amplifier features buffered RCA outputs, noise-shielding metal-end panels and custom tooled power connectors.




Kicker Audio: Quality, Performance, and Passion
(Sonic at Stillwater Designs HQ)



Kicker Always Exceeds Rated Power

General Features:

  • CX Series Single-Channel Class D Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 40 watts x 4 chan.
    • 2 ohms: 75 watts x 4 chan.
    • Bridged, 4 ohms: 150 watts x 2 chan.
  • Max power output: 600 watts x 1 chan.
  • Pulse Width Modulated MOSFET power supply
  • LED power (green) and protect (red) indicators
  • Variable Bass Boost (0 to +12 dB bass boost at 40 Hz)
  • 4/3/2 channel operation
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • Heavy duty aluminum alloy heat-sink
  • Nickel-plated RCA level inputs
  • Nickel-plated screw terminals
  • Input sensitivity:
    • Low level: 125mV-5V
    • High level: 250mV-10V
  • Selectable High Low or OFF electronic crossover (50-200 Hz, 12 dB/octave)
  • Subsonic filter (24 dB at 25 Hz)
  • CEA-2006 compliant amplifier
  • Frequency response: 10-20000 Hz
  • 8 gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier.
  • Dimensions: 7-3/16"W x 12-7/16"D x 2-3/8"H
  • Authorized Internet Dealer
  • 2-year Manufacturer's Warranty (extends to 3 years when purchased with a Kicker amp kit)
Also Found As: CX12001, 12-CX12001, 12 CX 12001

Power Specifications - Full Range Channels

RMS Power @ 4 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

40 watts x 4 channels
RMS Power @ 2 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

75 watts x 4 channels
Bridged RMS Power

Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the RMS power created once an amplifier is bridged.

150 watts x 2 channels

Amplifier Specifications

Amplifier Series
This designates the series of the amplifier. Many amps are available in a litany of different wattage and channel configurations, but maintain consistent features throughout the product line.
CX (Kicker)
Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

D
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
4
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.

600 watts
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

300 watts
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
4 AWG
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
2 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
4 ohms
THD at Rated RMS Power
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
0.1%
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
No
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
No
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Low-pass (LP)
High-pass (HP)
Full (AP)
Low-Pass Crossover Frequency
The low-pass crossover frequency is typically used for subwoofers. It can be a fixed crossover point or a variable crossover range. A variable low-pass crossover allows you to select a specific crossover point which allows frequencies below the set crossover point to pass, while making frequencies above the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

10 - 20000 Hz
Bass Boost
The objective of the bass boost is to get more kick out of your subwoofer. It is a circuit that emphasizes the lower frequencies at a given point. The bass boost should always be set first before setting the gain. This feature is known for destroying subwoofers and is commonly used incorrectly, so be cautious.
0 - 12 dB
Bass/Gain Remote
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
No
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
1A x 60 
CEA-2006 Compliant
Amplifiers that have been tested to meet specific standards. When a car amplifier meets these standards, you can be sure that it will be able to produce the amount of power specified by the official CEA-2006 rating. Usually, these rating consist of the following items:
  • RMS Power
  • Signal-to-Noise Ratio

This rating applies to both external car amplifiers, as well as the amplifiers inside of in-dash stereos.

Yes

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
50%
4 Star
50%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
3.8
Value
4.5
Features
3.3
Design
4.8
Usability
4.3
Freddy

Mision Tx

Overall
Durability
Value
Features
Design
Usability
excellent sq you just need to work settings on head unit.

September 4, 2013

I bought this kicker amp to power my memphis prv3 6.5 speakers. the sound great, like i said you need to find the correct settings on the head unit.good strong amplifier. As for durability it just came out about a year ago,we;ll see what happens.

15 of 27 found this helpful

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Mark

Ga

Overall
Durability
Value
Features
Design
Usability
Decent for a basic system

January 28, 2014

I have owned this amp for about a year now. This is a good entry-level amp for a basic system. I used it to power 6 Kicker 6" coaxials and 2 RF tweeters. System honestly didn't sound too bad, for being a budget system.

I have since upgraded to a JL Slash V3 300.4 amp and what a world of difference. Way cleaner sound, richer, much more power. But for $200, this really isn't a bad amp. I would definitely suggest an active crossover with this amp if you want clean sound.

13 of 27 found this helpful

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Caleb

Houston tx

Overall
Durability
Value
Features
Design
Usability
Kicker cx 300.4 review

February 10, 2013

I bought this amp to push my Polk audio db 691 front and 651 rear I didn't think this amp would push the front well with 40 watts rms at 4 ohm but kicker always underrates there amps some mine was 341 rms total and this kicker amp is awesome pushes more then enough to them with the gain set at 65% and you get what you pay for kicker is more expensive then most but it's clear clean watts and I recommend 100 % I previously had alpine mrf 300 I honestly like kicker better

12 of 27 found this helpful

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SlayerX

Citrus Heights, CA

Overall
Durability
Value
Features
Design
Usability
Simple amp with clean power

February 19, 2013

Class D technology has came a long way. The only full range class D I ever like was an Eclipse XA2000 with Bang and Olufsen ICEpower tech in it. While this amp isn't quite in the same class imo, it's a great choice from newer offerings. Currently running this amp on some JBL ms-62c components active off a DEH-80prs and sounds fantastic.
Not sure if it's from the amps "FIT" tech, or just got lucky, but I have almost an undetectable noise floor. No hum, buzz, whine, or anything.
Even at an underrated 40w, I set my gain to 40w, and it gets way loud before I get close to my max level, definitely good clean power!

13 of 30 found this helpful

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Product Summary

Manufacturer

Model Number

CX300.4

UPC

713034059813

Weight

7.00lbs

Internal SKU

12cx3004

Internal Product ID

64242

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Kicker CX300.4 (12CX300.4)

  • Kicker CX Car Amplifier Series
  • How to Install a Car Amplifier