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Kicker KEY180.4 4x45w 4-Ch Full-Range Smart Amp w Start/Stop Capability

4.4 4.4 out of 5 stars 20 ratings
Currently unavailable.
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Brand KICKER
Compatible Devices Radio
Output Wattage 45 Watts
Item Weight 2.4 Pounds
Model Name 45KEY1804

About this item

  • RMS Power Rating: 4 ohms @ 45 watts x 4 chan.
  • High level Input sensitivity: 250mV-10V
  • Frequency Response: 20 - 20000 Hz
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Kicker KEY180.4 4x45w 4-Ch Full-Range Smart Amp w Start/Stop Capability

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Package Dimensions ‏ : ‎ 10.7 x 8.6 x 2.8 inches; 2.4 Pounds
  • Item model number ‏ : ‎ KEY18 4
  • Date First Available ‏ : ‎ January 31, 2018
  • Manufacturer ‏ : ‎ Unknown
  • ASIN ‏ : ‎ B079H2CPN1
  • Customer Reviews:
    4.4 4.4 out of 5 stars 20 ratings

Product Description

The Key Smart Amplifier - The biggest advance - in the smallest package. Introducing the KEY smart amplifier and audio processor in one. 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. A 24dB crossover re-defines the capabilities of each speaker. Time alignment delivers unheard realism. The concert quality of your factory stereo is revealed! What would take hours for a professional to achieve happens in a matter of minutes. All automatically. All with the press of a single button. Measuring less than eight inches long and only two inches high, the KEY180.4 fits nearly anywhere. Mount it behind your radio, under the seat, or in your trunk with ease. The KEY180.4 is one of the first amps fully compatible with newer vehicles using start-stop systems. The amplifier also features FIT2 (Fail-Safe Integration Technology), providing compatibility with nearly every stock and aftermarket radio on the road today. 180 Watts Of Power (45x4) Auto EQ Microphone With Selector Switch Included Compatible with Start/Stop Vehicle Technology FIT2 Technology Included Turn On Via Remote 12v Signal Or DC Offset Auto 40-Band Equalizer Auto Gain Adjustment Auto Speaker Size Detection 24dB Crossovers 60/180/120Hz High Pass Filter (Defeatable) Specifications Power (watts/ch), 4 Ohm stereo 45x 4 Microphone/Kicker EQ button included Standard dimensions(H x W x L) 1-11/16 x 2-3/4 x 7-3/8 Metric dimensions(H x W x L) 4.3 x 7 x18.7 Frequency Response (Hz): 20-20k, +0/-1dB Input Sensitivity: high level 250mV-10V Signal-to-Noise Ratio:>90dB, a-weighted, re: rated power Active Crossover: 24dB/octave, selective high pass or all pass @ 60,80, or 120Hz What's in the Box: 1 - 4 channel power amplifier 1 - microphone 1 - microphone cable with switch 1 - fuse holder 1 - manual and installation hardware

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Customer reviews

4.4 out of 5 stars
4.4 out of 5
20 global ratings

Top reviews from the United States

Rzr guy
5.0 out of 5 stars Put this with your factory f-150 stereo and be impressed!
Reviewed in the United States on April 10, 2019
Verified Purchase
This little amp is the bees knees! I installed it in 2015 Ford F-150 with the For-11ck harness and it’s unreal how much of a difference it makes! The music is loud and clear and even the bass is impressive for just running four 6x9’s! It took a bit to dial it in using different settings on the dip switches with auto tune but it was well worth it. For those people looking to install this in F-150’s with the smaller 4” sync radio, it fits nicely in the dash right behind the screen.
One person found this helpful
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Andrew
5.0 out of 5 stars AutoEQ Works Great But Experiment With Mic Placement
Reviewed in the United States on June 22, 2019
The main feature of the Kicker Key amp is its ability to do AutoEQ and time alignment at the press of a button with the included calibration microphone. Therefore you won't need a separate DSP or EQ, and won't need to spend time tuning it.

I installed the Kicker Key amp in a 2012 BMW 135i coupe to power Audiotec Fischer Match MS 42C-BMW.1 4" mids and 1" tweeters in the front doors, and 2 x 4" stock speakers on the rear deck. I also have a Kenwood KAC-M3004 amp powering 2 x Audiotec Fischer Match MW 8BMW-D 8" underseat subs.

At first I ran the Kicker AutoEQ with the microphone on top of the driver's headrest pointing at the ceiling, as per the instructions. It made a huge improvement in evening out the volume and frequency response of the speakers, especially since I'm still using the stock rear speakers. However, the time alignment and imaging didn't sound quite right. So I ran the AutoEQ again but with the mic on the front of the headrest pointing forwards. This time the imaging was spot on, sounding more focused, and it lifted the sound stage above the dash.

In conclusion, the AutoEQ made a dramatic improvement in sound and this feature makes the Kicker Key amp a great value upgrade.
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Gregory M.
4.0 out of 5 stars It really does what it claims, to a point.
Reviewed in the United States on May 13, 2019
Verified Purchase
I was most interested in using this in its Bi-Amp mode to drive door components and under-seat woofers in my 328i. It did that, and it set that up very well with the auto-configuration, but the system simply didn't have enough juice to deliver much punch from the under-seat woofers in my BMW. To be fair, the drivers used are 7-ohms, and so this amp was probably only giving them 20W or so each, trying to drive bass signals. Not fair to the amp to say it wasn't great for that. I've since switched it up to drive the front door components and rear deck full-range drivers with the built in time delay and EQ, and it's magic. The imaging is rock solid in the center of the dash, the tonal balance is excellent, there's no "digital sounding" artifacts, it's just a really good amp with some awesome tricks up its sleeve. IF you want something small to drive satellite speakers and want to get the best image and EQ set for your car without having to invest in a lot of additional tuning, this will do it for you and will do it well.
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Jon
5.0 out of 5 stars Make your factory radio great. No kidding.
Reviewed in the United States on April 15, 2019
Used it on a Toyota Sienna which had awful sound. Instead of spending megabucks, bought this amp. Installed by a professional. Now it sounds very high end. It has built in filters which bring out the complexity of the music and voices. But you must, repeat must play the "pink noise" provided by Kicker into the included microphone to calibrate the unit, otherwise it will just be amplified, louder bad sound. I know this to be a fact because the installer did not calibrate the amp on the first try, and only did calibrate it when I brought the car back to try to improve the sound. BUY IT!

Update 5/3/2019 Added sound deadening to the doors for even cleaner sound.
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John L. Webster
4.0 out of 5 stars the auto EQ feature proved not so great. No matter where I placed the mic nor ...
Reviewed in the United States on April 2, 2018
Verified Purchase
Traded a Jeep Cherokee with the 9 speaker Alpine system for a Ram 1500 Quad cab with the 5 inch touch screen and 6 speaker base audio system. Needless to say the base audio system was lacking. I started upgrading by replacing the factory speakers with the Mopar Kicker upgrade sets with the 1" inch tweeters and 6 x 9 woofers in the front and the 2 way 6 x 9 speakers in the rear. The sound improved tremendously with crisper high end and mid-range and much cleaner bass but lacked punch. I ordered and installed this amp and things really came alive. In fact, it now out performs the 9 speaker Alpine system. All the volume I want, crystal clear mids and highs and detailed and punchy bass. I'd give it 5 stars but, the auto EQ feature proved not so great. No matter where I placed the mic nor how many times I ran it, the EQ'd sound seemed compressed and muffled. Using the EQ may have helped with the factory speakers but, The Mopar Kicker speakers sound much better without the EQ.
12 people found this helpful
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89grand
1.0 out of 5 stars It refused to auto-tune.
Reviewed in the United States on May 11, 2019
Verified Purchase
Now I know my way around car audio. I've been installing my own equipment for over 30 years. I currently have a much more sophisticated install in my car, which I did myself. With that out of the way, this thing refused to auto tune itself. I received the error" Too much ambient noise" no matter what I did. And I tried at least 40 times. Kicker isn't clear on how exactly it is supposed to work, but I uploaded the pink noise file from their site. I'd play it, then start the auto-tune process, and after the beeps stopped, warning you to get out of the car, the pink noise stopped being heard, it would sit in dead silence, and then I'd get the error. It never once played the pink noise before the error. I might have just received a lemon, but it anyway, it doesn't work.
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