Buy Now, Pay Later
As low as
$39.99
/ mo
Learn more
- – 6-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Free shipping on this product
30-day returns
Learn more
FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
12 left in stock
Arrives
Wednesday, Jul 1
Features
- Dont just make your system louder - make it clearer. Make it better.
- Press the selector, and the microphone goes to work. The KEY uses a powerful internal computer to deliver dramatic improvements in realism and soundstage.
- A massive 40-band equalizer improves tonality, and a 24dB crossover re-defines the capabilities of each speaker.
- The concert quality of your factory stereo is revealed! What would take hours for a professional to achieve happens in a matter of minutes.
Item dimensions L x W x H: 10.75 x 8.5 x 2.75 inches
Voltage: 12 Volts
Manufacturer: Kicker
Maximum Supply Voltage: 12 Volts
Mounting Type: Surface Mount
Voltage: 12 Volts
Maximum Supply Voltage: 12 Volts
Mounting Type: Surface Mount
Number of Channels: 4
Output Power: 200 Watts
Item Dimensions: 10.75 x 8.5 x 2.75 inches
Specification Met: FCC
Manufacturer: Kicker
Model: 47KEY2004
Brand Name: KICKER
Warranty Description: 1-Year Manufacturer Warranty
Global Trade Identification Number: 74
UPC: 713034013174
Part Number: 47KEY2004
Item Weight: 2.2 Pounds
Included Components: 47KEY2004
Unit Count: 1.0 Count
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Jul 1
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
This DSP and amp is amazing! It gives a huge new dimension to your music. It's pretty small, and it's light, so it can fit in a lot of locations. It's very powerful. You won't need another more powerful amp on the side as well. I can only turn up my volume about 1/3 of the way before it gets unsafe (90dB) to listen to. The color coded wires are helpful and easy to follow.
...
show more
Reviewed in the United States on February 16, 2026 by Michael Schneider
What an exceptional little amp. The sound quality is phenomenal, the clarity is fantastic! I combined this with Kicker KS series 6x9 components up front and 6.5 coaxial speakers in the rear of my 2019 F150 XLT. I wish I had done this years ago. Only small crux is I ended up needing to run a remote turn on wire as the auto turn on wasn't functioning properly in my truck. One wire and a lot of rerunning wire and it started up with zero issues. I really hope that Kicker expands the Key technology further in the future. It's now a proven concept that can match the performance of most DSP setups but adds the value of being DIY friendly for those of us who prefer to install our own equipment or cannot afford a full DSP setup and the associated installation and tuning costs and or headaches. I'd love to see Kicker offer a higher watt version of this amp. If and when they do, I'll be seriously considering an upgrade. Not to say that this isn't powerful though, I honestly can't crank it all the way up because it's too loud. I love being able to say that! Also it makes all kinds of music better. It truly doesn't matter what you listen to, you will hear instrumentation and vocals that you have never noticed before while listening to your all time favorite songs.
...
show more
Reviewed in the United States on March 20, 2023 by C. Hawley
Big improvement over stock in 2025 Ford F150. Very clear at higher volume. With upgraded speakers, the system has vastly improved over the factory non B&O system.
Reviewed in the United States on March 15, 2026 by Pmen
This is a compact amplifier with great sound stage. I installed this in a 2025 Kia K5 GT. The amp cleared up the sound in my door speakers so I can actually hear the words at a decent volume. I also replaced my stock door speakers with a set of Rockford Fosgate speakers. Great buy.
Reviewed in the United States on January 8, 2026 by Larry B.
Used this in a 66 mustang complete build. Made custom pods for the kicks with tweets six inches above. I have a very nice set of 5.25" CT Sounds components that sounded like a dumpster fire smothered in hot fecal matter. I knew that they needed more power than they are getting from the deck so I went looking for a two channel amp to liven them up. Ended up buying this four channel Kicker after reading lots of reviews. I received the amp on time as expected. It was MUCH smaller than it seemed in pictures. Did the install fitting it all inside the glovebox of the mustang and guess what. Still sounded like garbage only louder. Next step was to hook up the microphone and set up the DSP equalizer, time delay and crossover network. I installed the mic on the headrest and ran the pink noise track. Five min later after some wizardry this thing sounds awesome. Flattened out the mids and tweets blending great with the sub after I plugged it back in after the calibration. I could not be happier with the install and the sound. If you make this purchase please take the time to use the DSP. It makes a world of difference.
...
show more
Reviewed in the United States on May 2, 2021 by Jayson
Wired the key amp directly to my anc wires, used a anc ch01 harness and is plug and play in my 21 Ram DT with base audio. You cut harness, connect high level to amp wires and connect other side to speakers, the anc ch01 is labeled for speaker wires correctly(no guessing) for the Ram, so makes it easy. Then cut the white connector with yellow and black wire, the anc amp in the Ram has 25 amp fuse, this key amp is 20amp. Black wire is ground. I wired it all up in house, went out and plugged in(takes 30 seconds to plug into old connectors that went in and out from the anc amp. So now sound, turn off auto EQ, is boosts the lows and highs and makes highs too bright. I feel like 50 watts per channel should get louder, I listen to it at over 80% of my total volume. Bass tracks sound fantastic, but rock tends to be lower volume(think that is the music streaming I use). I am going to reset it and try a few more times, seems like the clipping light comes on too soon. Might be due to I have jbl 2.3 ohm 6x9s in back and kenwood 6x9+3.5 component set in parellel up front. It is worthwhile to do in the Ram. I found my windshield reflects a odd sound, so I added a circle sticker under 3.5 cover to stop the windshield relection. Update 5-2-26 I wired a kicker kisloc2 at the speaker inputs at the kicker key to run to a a 2k subwoofer mono amp. The key 200.4 best way is to run the fronts in active and back speakers in the Ram off stock stereo. When doing it this way, you pass through the wires coming into anc(with the anc bypass hasrness) and connect direct to the rear speaker wires on harness. Then you switch the key amp to active and wire the front speakers only into the amp, when the switch is on, the wires coming out of the key amp front will now be dash and rear the doors. Takes a little more work with it this way, will have to run new speaker wires from 3.5 speaker in dash to the amp front input. It was hard for me to get correct sound out of the Ram. Infinity and jbl 3.5 sounded odd, hiss sound etc. Kenwood 3.5 that came with the 6x9 woofer in component set sounded off too, but the 6x9 woofers sounds excellent. So I decided to try wideband 3.5 carbon cone neodyme shca 3.5 speakers and love the sound. No seperate tweeter, but hits the highs and not fatigued after listening. Very happy with sound now. The key 200.4 sounds great and with 1400 watts rms sub amp and 2 10 inch audiocontrol spike subs, is great.
...
show more
Reviewed in the United States on May 15, 2025 by rotwiler
Awesome sound.. install in a 2023 Honda Ridgeline, that was the hard part...the Noise canceling device in the Honda was a pain in the butt to find and shut down. I would buy this amp and again.
Reviewed in the United States on January 5, 2026 by Michael Purington
I used this in my '17 Toyota Tacoma with the stock head-unit. I had previously upgraded all of the door speakers and dashboard tweeters with Kicker units, and the sound was, while much clearer and fuller, somewhat lacking in volume. I found a tutorial on tacomaworld on how to build a plug-n-play harness for this amp, and it installed quickly and easily, fitting nicely behind the stock head unit in the dashboard. You do need to follow the directions on how to set up the EQ, once installed to get the best sound. and when I say best sound, i mean it will sound like crap unless you do, so download the pink noise from kicker's website and take the 5 minutes to tune the amp. you'll be much happier. All in all, it checked off all the boxes for me. Easy to install, relatively inexpensive and a huge improvement in sound.
...
show more
Reviewed in the United States on September 28, 2020 by GreenZRX