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Kicker 47KEY2004 4-Channel Full-Range Compact Amplifier with Start/Stop Capability

Regular price $223.96
Sale price $223.96 Regular price
$279.99 Save $56.03 (20%)

Limited time offer! Sale ends 7/28/2024.
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Product Information

Model: 47KEY2004 | UPC: 713034013174


What's In The Box

Product Information

Model: 47KEY2004 | UPC: 713034013174

The biggest advance - in the smallest package. Introducing the KEY smart amplifier and audio processor in one, featuring AI-driven DSP.


  • 200 Watts Of Power (50x4)
  • 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
  • Bi-Amp Capability (Defeatable)
  • Auto Compressor (Defeatable)
  • Kicker EQ Preset (Defeatable)
  • Auto Time Alignment (Defeatable)
  • Auto Level Adjustment (Bi-Amp Mode Only)
  • Auto Speaker Size Detection
  • 24dB Crossovers
  • 60/80/120hz High Pass Filter (Defeatable)

Acoustic Correction = Audio Perfection

Don't 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, all automatically with the press of a single button.


In addition to unbelievable sound quality, the KEY200.4 delivers 200 watts of pumpin' power to your factory speakers. At KICKER, we know power and clarity always go hand-in-hand.

Hidden Treasure

Measuring less than eight inches long and only two inches high, the KEY200.4 fits nearly anywhere. Mount it behind your radio, under the seat, or in your trunk with ease.

Start. Don't Stop.

The KEY200.4 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.

Keep the Beat

If the temperature reaches the threshold, the KEY200.4's dynamic power-management algorithms kick into gear! Instead of hearing the amplifier's volume “pumping” or blowing a fuse – KEY technology engages a nearly inaudible limiter/compressor, applied only to the peaks of the music for as little as milliseconds at a time. The amplifier quickly cools, which deactivates the compressor. Music returns to its full dynamic range without a moment’s interruption!


  • Power (watts/ch), 4 Ohm stereo: 50x 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

  • 4 channel power amplifier
  • Microphone
  • Microphone cable with switch
  • Fuse holder
  • Manual and installation hardware
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