Automatic High-Fidelity Sound

You can now enjoy fantastic high-fidelity sound without spending a lot of money on complicated gear or wasting time fine-tuning your system after installation. Kicker’s compact KEY200.4 amplifier features automatic signal processing that adapts the sound to your vehicle’s interior space. This compact 4-channel powerhouse delivers 50 watts RMS to each of your front and rear speakers—more than twice the power of a typical aftermarket receiver, and three to four times the power of a factory radio.

KEY Auto Setup: Tuning in Minutes, Not Hours

After installation, just set up the included calibration microphone, play the test tone (available for download from Kicker), press the activation button, and the KEY Auto Setup software automatically adjusts filters, the 40-band EQ, and time alignment for the driver’s seat. Later, you can use the button to switch between processed and unprocessed sound—to impress your friends and family with the difference.

Advanced Features

You can manually activate automatic compression for more consistent and safe output. A limiter engages and lights up when clipping is detected, warning you that the volume is too high. A Bi-Amp mode allows you to actively power tweeters and woofers without passive crossovers, using filter settings applied during KEY Auto Setup.

Start-Stop Problem Solved

Some eco-friendly cars shut off the engine when stopped and restart when the brake is released. The resulting voltage drop can shut off an amp or cause dangerous clipped signals to be sent to the speakers. The KEY200.4 avoids this by automatically activating its limiter in these situations.

Great Integration

This amplifier is so compact it can fit nearly anywhere in any vehicle. Kicker’s FIT2™ technology uses speaker-level inputs with DC offset detection at startup, ensuring compatibility with almost any system—even those using a factory radio. The Radio-Detect switch ensures you won’t get a “No Speakers Detected” message on your receiver’s display when this amp is installed.

Product Highlights:

• 4-channel car amplifier/audio processor

• 50 watts RMS x 4 at 4 ohms

• CTA-2006 compliant

• Non-bridgeable – minimum impedance: 4 ohms per channel

• Class D amplification technology

• KEY Auto Setup customizes signal for your vehicle

• Includes calibration microphone and activation button

• Pink noise test tones available at Kicker.com

• Automatic tuning includes a 40-band EQ, 24 dB/octave crossover filters, and time alignment

• Bi-Amp mode applies tweeter/woofer crossover settings during KEY Auto Setup

• Switchable automatic compression

• Selectable high-pass filters (off, 60, 80, 120 Hz; 24 dB/octave)

More Info:

• Auto limiter with clipping indicator LEDs

• Preamp and speaker-level inputs

• DC offset detection on speaker-level inputs for turn-on

• Radio-detect circuit simulates a speaker load for factory radios

• Wiring and hardware not included

• Recommended 12- or 10-gauge power and ground wires

• Fuse rating: 20A x 1

• Dimensions: 7-3/8" W x 1-11/16" H x 2-3/4" D

• Warranty: 1 year