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Kicker 47KEY200.4

Compact 4-channel car amplifier with automatic tuning DSP — 50 watts RMS x 4

Item # 20647KEY20

Now you can get fantastic, high-fidelity sound without shelling out a lot of money for complicated gear or spending...

Find what Fits your car

Now you can get fantastic, high-fidelity sound without shelling out a lot of money for complicated gear or spending...

Ships free

Expected: 12/8/2020

About the Kicker 47KEY200.4

Automatic high-fidelity

Now you can get fantastic, high-fidelity sound without shelling out a lot of money for complicated gear or spending too much time tuning the system after installation. Kicker's KEY200.4 compact car amplifier features automatic signal processing that tailors the sound for your specific vehicle's interior space. This 4-channel compact power pack will send 50 watts RMS to each of your front and rear speakers — way more more than twice the power of a typical aftermarket receiver, three or four times the power of a typical factory radio.

Automatic high-fidelity

Now you can get fantastic, high-fidelity sound without shelling out a lot of money for complicated gear or spending too much time tuning the system after installation. Kicker's KEY200.4 compact car amplifier features automatic signal processing that tailors the sound for your specific vehicle's interior space. This 4-channel compact power pack will send 50 watts RMS to each of your front and rear speakers — way more more than twice the power of a typical aftermarket receiver, three or four times the power of a typical factory radio.

KEY Auto Setup tunes in minutes, not hours

After installation, you set up the included calibration mic, start the test noise (downloaded from Kicker), hit the activation button, and the KEY Auto Setup software automatically sets the crossovers, 40-band EQ, and time-aligns the sound for the front seat driver. Then later, with the button, you can A/B the before- and after-processing sound, to amaze your friends and family.

Advanced features

You can manually enable Auto Compression, for a more consistent and safer power output. A limiter kicks in and lights up when it detects clipping, letting you know that something's too loud. A Bi-Amp mode lets you actively run tweeters and woofers without a passive crossover, by applying customized active crossover settings during the KEY Auto Setup process.

Start-Stop problem solved

Some eco-friendly cars actually turn off their engines when stopped, and then start up again when the brakes are released. The voltage dip during starting could shut down an amplifier or allow it to pass a dangerous clipped signal to the speakers. The KEY200.4 prevents these issues by automatically engaging its limiter in these circumstances.

Integrates well

This amp's so tiny, it'll fit almost anywhere in almost any vehicle. Kicker's FIT2™ technology, using speaker-level inputs with DC offset sensing turn-on, ensures this amp will work in just about any system, even one with a factory radio. The Radio-Detect switch makes sure you never get a "No Speakers Detected" message on your receiver's display when you install this amp.

Kicker KEY200.4

KEY200.4 with activation button and calibration mic

READ LESS

Product highlights:

  • 4-channel car amplifier/sound processor
  • 50 watts RMS x 4 at 4 ohms
  • CTA-2006 compliant
  • non-bridgeable — minimum impedance of 4 ohms per channel
  • Class D amp technology
  • KEY Auto Setup customizes the signal for your vehicle
    • calibration mic and activation button included
    • pink noise test tones available from Kicker.com
    • automatic adjustments include 40-band EQ, 24 dB/octave crossover filters, time alignment
  • Bi-Amp mode applies tweeter/woofer crossover settings during KEY Auto Setup
  • switchable auto compression
  • selectable high-pass filters (off, 60, 80, 120 Hz; 24 dB/octave)
More Info:
  • automatic limiter with clip lights
  • preamp and speaker-level inputs
    • DC offset sensing turn-on with speaker-level inputs
  • Radio-Detect circuit supplies speaker load for receiver to sense
  • wiring and hardware not included with amplifier
    • 12- or 10-gauge power and ground leads recommended
  • fuse rating: 20A x 1
  • dimensions: 7-3/8"W x 1-11/16"H x 2-3/4"D
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # 47KEY2004

What's in the box:

  • 4-Channel amplifier
  • 12" Power/ground/speaker output harness
  • 12" Input harness
  • Loop wire w/ inline fuse holder (20A fuse installed)
  • Calibration microphone w/ attached 11.5' cable and inline Activation button (cable terminated in a 3.5mm TRS plug)
  • 16" Rubber microphone strap
  • Two 12" wire ties
  • Four 1" screws
  • Quickstart guide

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Kicker 47KEY200.4 reviews

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More details on the Kicker 47KEY200.4

Mark G.

Product Research

Features

Overview: The Kicker KEY200.4 amplifier features 4 x 50W RMS power in a compact chassis designed to be used with most any factory or aftermarket radio. Built-in, AI-driven DSP processing lets you fine tune the system to your vehicle with a single button push, providing a more realistic soundstage.

Power&Bi-Amping: The KEY200.4 amplifier features Class-D amp topology, making it more compact and able to run cooler than other types of amplifiers. The KEY200.4 can provide up to 50W RMS power to each of the 4 channels, running in either a full-range or bi-amp configuration. The optional Bi-Amp setting lets your power a single woofer/tweeter component speaker set using the 4 output channels. When switched to Bi-Amp, via the DIP switch matrix, the amp will automatically detect and apply one of two Bi-Amp Modes after running the KEY Auto-Setup using the provided microphone. Bi-Amp Modes include:

  • Woofers & Tweeters: Applies a 3.2kHz 24dB/oct high-pass filter for the tweeters, and a 3.2kHz low-pass for the woofers.
  • Woofers & Dash Speakers: This mode applies a 320Hz 24db/oct high-pass filter for the dash speakers, and a 640Hz low-pass filter for the woofers.

KEY Technology: The KEY200.4 features built-in, AI-driven, DSP that can dramatically improve the sound quality of your system. Prior to running the Auto-Setup, you will need to have a pink noise source ready to play from your headunit, either CD, MP3, AUX, Bluetooth, USB, etc. For best results, uncompressed audio is recommended, ensuring full amplitude across the frequency spectrum. Pink noise test tones are available from Kicker and can be found here.  The included Auto-Setup microphone and rubber hold-down strap let you place the microphone on top of the driver's side headrest, while an inline Activation button lets you start the Auto Setup, giving you 10 seconds to exit the vehicle. If the Auto-Setup needs to be run again, holding down the Activation button for 10 seconds will reset the Auto-Setup. Auto-Setup features include Kicker EQ, Time Delay, and speaker sensitivity matching. Kicker EQ and Time Delay features can be enabled/disabled via side-panel DIP switches and must be enabled (default) before running the Auto-Setup. If disabled after Auto-Setup, the setting is still kept in internal memory and will be re-applied if the switch is enabled again.

  • Notes:
    • Pink noise test tones are NOT included and can be downloaded here.
    • Factory noise-canceling and active noise enhancement must be disabled before running the Auto-Setup.

DIP Matrix: An 8 switch DIP matrix lets you quickly activate/deactivate settings from the Auto-Setup along with additional options.

  • Auto Turn-On: Two settings are available:
    • 12V: Uses a +12V trigger from a headunit for activation.
    • DC: DC Offset mode uses a 3V DC offset on the speaker wires to detect when the headunit has been powered on. This option only works when using speaker-level inputs. The DC Offset setting causes the Remote Wire to change to a +12V Remote Output for activating other amplifiers from the KEY200.4.
  • Time Delay: Enables/disables the time delay for each speaker, set by the Auto-Setup.
  • Kicker EQ: Enables/disables the Kicker EQ settings made during the Auto-Setup.
  • Compression: Enables the Auto Compression feature that reduces higher amplitude signals above a certain threshold, providing a more consistent level with less jumps in volume.
  • Fader: The On setting lets you run front and rear input signals into the amp. Off lets you feed all 4 channels from one stereo input.
  • Bi-Amp Mode: Can be set On when running a single component speaker set from all 4 output channels.
  • Hi-Pass: Two DIP switches let you activate and configure an internal high-pass filter for 4 output channels. Options include: Off, 60Hz, 80Hz, and 120Hz.

Other Controls&Features:

  • Gain: Two Gain dials let you match the radio's output signal to the amp's input. The included Limiter LEDs can be used in conjunction with the Gain dials, letting you increase the input signal until the Limiter LEDs light, then backing them down below the clip point.
  • Radio Detect: This button can be activated if using speaker-level inputs from a factory headunit that stops outputting sound after being connected to the amplifier. This activates a load resistor, letting the headunit continue to output sound as if the factory speakers were present.
  • Limiter: A built-in Limiter circuit can automatically engage to protect your speakers. Two LEDs light to indicate when the Limiter is being activated, which can happen if the signal starts to clip or distort.
    • Start Up: It automatically engages during vehicle start up when the vehicle voltage drops momentarily.
    • Low Voltage: If the input voltage drops below +10.8V, the Limiter may light at moderate to high volumes.
    • Input Signal Overdrive: If the Input Gain is too high, louder signals may start to clip, activating the Limiter.

Power Management: The KEY200.4 amplifier is fully compatible with newer vehicles using start-stop systems. It also features FIT2 (Fail-Safe Integration Technology), making it compatible with nearly every factory and aftermarket radio.

Wiring: The KEY200.4 includes an 8-pin Input Harness and a 14-pin power/ground/speaker output harness.

  • Input: Includes 4 RCAs for use with low-level input signals. If using speaker-level outputs from the radio, the RCAs get cut off and bare-wire connections are made.
  • Output: Includes two 14AWG wires each for both power and ground. A 20A fuse and fuse holder is provided for attachment at the battery. Four pairs of 18AWG wires provide the speaker outputs:
    • White: LF+
    • White/Black: LF-
    • Gray: RF+
    • Gray/Black: RF-
    • Green: LF+
    • Green/Black: LF-
    • Purple: RF+
    • Purple/Black: RF-

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Customer Q&A

12 questions already asked

Q
Can this be used to power a sub?
[ Bryan  Nov 27, 2020 ]
4 answers
A
No. It is non bridgable. It is best used for active front stage of components.
[ BRYCE  Nov 27, 2020 ]
A
very low power for a sub. another kicker key amp product is for subs
[ Jose A Ruiz  Nov 27, 2020 ]
A
Not this model. Its for four channel sound only. You'd want the kicker key 500.1 if you were looking for sub only.
[ Mike  Nov 27, 2020 ]
A
Yes it can be used as a mono amp
[ Vincent  Nov 27, 2020 ]
Q
Does having this amplifier require a line-out converter if I'm using a factory head unit with no RCA input?
[ Casey  Nov 14, 2020 ]
3 answers
A
No. You can snip the rca ends off of the inputs and use your speaker wires as high level inputs. I believe the manual shows you how. I would check kickers website for that download.
[ KODY  Nov 14, 2020 ]
A
No you don't need the line-out just wire direct to this. It has harnesses where you splice your wires to and input and output, the other end of the harnesses plug right into it.
[ MIKE  Nov 14, 2020 ]
A
No it takes hi-level, so just run speaker wire. Few videos on the web to check out, btw.
[ CHRISTOPHER  Nov 14, 2020 ]
Q
Will this amplifier work on a 2020 Toyota Tacoma TRD Off Road with a non JBL HU without having to install the Kicker 46KISLOAD4?
[ Todd  Nov 11, 2020 ]
1 answer
A
I installed full systems in my Chevrolet Traverse and my wife's Kia Soul ( keeping the factory head unit on both vehicles) .Each vehicle with the Kicker Key200.4 amp( each with all new speakers and additional power subwoofers). The Kicker Key47 200.4 is an awesome amp in a little package. Both vehicles audio systems are awesome,crisp and power.But this amp is NOT simply plug and play. It will require one to have experience in installation or paying for professional install.
[ Kevin  Nov 11, 2020 ]
Q
Can it bridge it with a monoblock amp?
[ Borntobuild  Oct 22, 2020 ]
1 answer
A
No. It's bi-ampable, but not bridgable.
[ Mike  Oct 22, 2020 ]
Q
I have a 4 channel radio with a 6 speaker setup (the front channel radio outputs power door mounted woofers and A-pillar mounted tweeters with inline crossovers). If I wanted to connect all 4 channels of my radio, would the time alignment feature still work considering the spacing between the woofers and the tweeters?
[ Fernando  Oct 05, 2020 ]
1 answer
A
I have 9 speakers connected,, the doors have a woofer on the bottom of the door and tweeter on the door pillar for each door, the twweters of which have a separate crossover. The subwoofer is connected to the rear speaker outputs for the speaker level inputs as the subwoofer has its own amp. I conducted the time alignment without the sub connected which turned out great as each door was connected to a separate channel. Turned on the sub and adjusted the subwoofer using the amp provided with the woofer. Your setup will work.
[ Ronnie  Oct 05, 2020 ]
Q
I have a 2014 VW CC Exec. with a factory RNS510 head unit. I would like to connect the Kicker 47KEY200.4 to this head unit. Will I need to upgrade my factory speakers at this time?
[ Paul  Sep 06, 2020 ]
1 answer
A
You won't NEED to upgrade your factory speakers, but to get the best out of your sound system, I would definitely recommnd upgrading so you can have clearer sound. I have CSC65 Kicker speakers I installed and they sound so much clearer than my stock speakers in my 2018 Kia Soul.
[ Casey  Nov 14, 2020 ]
Q
I have a 2014 VW CC Exec. with a factory RNS510 head unit. I would like to connect the Kicker 47KEY200.4 to this head unit. Will I need to upgrade my factory speakers at this time?
[ Paul  Sep 06, 2020 ]
1 answer
A
The short answer is No, you don't need to update the factory speakers. The Kicker Key series are designed to be incorporated to your stock sound system and take full advantage of it. I would definitely recommend upgrading the factory speakers but it is not an absolute necessity, you'll see a vast improvement of sound quality with just the amp.
[ JARED  Sep 06, 2020 ]
Q
I have an Boss BV960NV with 10 band eq. 1) How is this affected? 2) Is this supposed to be a first time amp?
[ James  Sep 05, 2020 ]
2 answers
A
You can still use the HU, just plug right into the amp's inputs. The Key eq's the system with the microphone and built in dsp. Not a *first time amp*, check youtube(5star), but it's intended for newer vehicles where replacing the factory unit is not possible or ill-advised (like my 2019 ranger with sync 3). You get the benefits of auto eq and time alignment with something designed to fix factory systems.
[ Brian Cross  Sep 05, 2020 ]
A
This amp will not affect anything you have in your vehicle it will only give your speakers the boost they need to really come to life. No this amp is not a first time amp but it will be the only amp you'll ever need to power your inside speakers and it's perfect cause you can hide the amp pretty much anywhere you like. Trust me and get this amp!!
[ NOEL  Sep 05, 2020 ]
Q
I have a 2017 F150 with the non Sony Sync3 system. Has anyone tried adding this amp to the factory HU? If so does it interfere with all of your door chimes back up sensor etc? And how is the sound quality when paired with the oem door speakers? I plan on running this little amp and retaining my factory speakers, just perhaps adding this amp to them and a micro JL sub.
[ GABRIEL  May 23, 2020 ]
1 answer
A
You will want to contact an Advisor by phone (1-800-324-9695) or online chat to discuss compatibility with your factory system. They will be able to pull up your vehicle and see if this will integrate. If it does not, then they will also be able to discuss other options with you.
[ Calvin  Jun 15, 2020 ]  Staff
Q
If I want to use the 200.4 to power my front separates in bi-amp mode, does that mean I no longer need the passive crossovers that came with my speaker set? Also, if I decide to use my radios built in amp to power the rear speakers, will the 200.4's automatic setup still work well since it is only in control of the front speakers?
[ E  May 20, 2020 ]
3 answers
A
I just installed the KEY 200.4, Kicker tech support says you do not need line out converters which may be what you are calling the passive crossovers, regardless if you connect it up as high or low inputs. I also installed the Kicker speakers which did not come with any additional items to install. I set the KEY to 80, no bi-amp mode, and connected all four door speakers which have tweeters built in. I believe the dash tweeters are connected using the same wires as the front door speakers since I didn't see anything specific in the wiring from the radio. I set the radio to flat EQ, the balance dead center, using all speakers. The auto tuning program that comes with the KEY gave a "happy confirmation" and all sounds great. Hope that helps.
[ JEFF  Jun 03, 2020 ]
A
Correct , you will not use the passive crossovers at all. Run the auto setup with your rear speakers disconnected. Once the auto setup is done you can reconnect your rear speakers and use the controls on your head unit to tweak the rears. The manual tells you to place the mic facing straight up but I found when setting up mine that it works better when in bi-amp on front components to face the mic forward in the center of the drivers headrest.
[ Thomas Knight  Jun 03, 2020 ]
A
Assuming you are talking about a component speaker set with a woofer and tweeter, if you don't use the crossover, you will still need to provide the appropriate high pass for the tweeter, and potentially low pass for the woofer. As far as tuning the Kicker with your head unit running the rears - the 200.4 won't complete calibration if it is not in control of all speakers playing pink noise during the tuning - so you will need to be able to completely silence the rears during the calibration - either fade control or disconnecting them, as an example. However, your rear speakers will not be tuned/calibrated to match the speakers driven by the Kicker, so I would expect this to be a sub-optimal result from a sound quality perspective.
[ THOMAS  May 20, 2020 ]
Q
Can I install the Kicker 47key200.4 in a 2014 F150 w/o Sony radio without cutting factory wiring ? Is there a wiring harness I can buy to prevent from cutting the truck wiring when installing the Key Amp?
[ Billy  May 02, 2020 ]
1 answer
A
You'd have to look for a wiring harness. The kicker key amp works like an in-line fuse. You need an input source and the kicker key is the output source. I feared to cut my wiring harness, however I did. It is worth the effort. Sound quality is much better and clear.
[ Ronnie  May 06, 2020 ]
Q
Can I install this KICKER 47KEY200.4 directly from the back of the factory radio to the speakers? Or Do I need a Kicker 46KISLOAD4 installed first to connect the KICKER 47KEY200.4�
[ Ronnie  Mar 16, 2020 ]
1 answer
A
Hi Ronnie. Thank you for your question. The 46KISLOAD4 may not be needed in all situations. Please chat with us online or by phone at 1-800-324-9695. An Advisor will be happy to help you determine if the 46KISLOAD4 is a product you will need to use.
[ Jess  Apr 02, 2020 ]  Staff
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