Let KEY professionally tune your system – just sit back and enjoy the music.

Consumer Notice!

We have discovered there are counterfeit KICKER products being sold online by unauthorized Internet retailers. The best way to ensure you are purchasing genuine KICKER products ALWAYS is to make sure you are buying from an Authorized KICKER Retailer.

To verify a retailer is authorized, go to There you will find a complete list of all Authorized KICKER Dealers, including Authorized Internet retailers. If the Internet retailer you intend to purchase from is not on the list, they are not authorized. If you are still unsure, contact our Customer Service department at (405) 624-8510 and we will be happy to assist you.

A Better Sound. Automatically.

The KEY200.4 Smart Amplifier uses AI-driven DSP to dramatically improve the quality of your audio in a matter of minutes. Press one button and you’re done!

Little Amp. Big Difference.

Measuring less than eight inches long and only two inches high, KEY amps fit nearly anywhere. Mount them behind your radio, under the seat, or in your trunk with ease.

Ready for Your Ride

KEY amplifiers are fully compatible with nearly every stock and aftermarket radio on the road today, including newer vehicles equipped with start-stop systems.

Packed With Power

KEY Smart Amps deliver more than enough juice to rock your ride. With 500 watts RMS to your subs (from the KEY500.1) and 50 watts per channel to the door speakers (from the KEY200.4), the KEY family of amplifiers deliver the sound you’ve been looking for.

The Ideal Integration Solution

The revolutionary KEYLOC® automatically detects the frequency range of your speaker leads, with no oscilloscope or RTA. It’s every installers’ go-to solution!


Fire Hazard

Prolonged, continuous operation of an amplifier, speaker, or subwoofer In an over-powered, distorted, or clipped manner may cause your audio system to overheat and catch fire. To prevent property damage :

  • Turn OFF and allow components to cool after extended periods of use.
  • ALWAYS read and follow Installation Instructions. Professional installation recommended.
  • NEVER cover amplifier or subwoofer. Clearance requirements: AMPLIFIERS - up to 4 in. (10 cm), SUBWOOFERS - minimum of 1 in. (2.5 cm) from front of speaker and any surface.
Hearing Loss Hazard

Your KICKER product can produce sound levels that can permanently damage hearing! To prevent possible permanent hearing loss :

  • IMMEDIATELY reduce volume if you experience any pain or other symptoms.
  • ALWAYS reduce volume if you hear audible distortion. Distortion may cause more damage to your ears than listening to an undistorted sound at the same volume.
  • ALWAYS use common sense when controlling volume.
Refer to Owner's Manual

Refer to Owner's Manual for additional safety information.

since 1973

© , Stillwater Designs. All rights reserved. Copyright and Trademark Notice.

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