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. All with the press of a single button.

Start with these FREE TEST TONES for easy setup!

Pasmag Reviews the Key Smart Amplifier

Designed specifically to greatly improve the sonics of a typical “deck and four” or OEM sort of system, the Kicker KEY amplifier uses powerful digital signal processing to bring concert realism to your car. Read the full review here.

Hear what the other reviewers have to say about this product! Read the reviews here.

POWERHOUSE:
In addition to an 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!

DETAILS, DETAILS:

• 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)

Model: KEY200.4 (Kicker Key 200.4)
Total RMS Power: 200 W (50 W × 4 @ 4 Ω) :contentReference[oaicite:1]{index=1}
Frequency Response: 20 Hz – 20 kHz (+0/–1 dB) :contentReference[oaicite:2]{index=2}
Input Sensitivity (High-level): 250 mV – 10 V :contentReference[oaicite:3]{index=3}
Signal-to-Noise Ratio: > 90 dB A-weighted (rated power) :contentReference[oaicite:4]{index=4}
Active Crossover: Off, 60 Hz, 80 Hz, or 120 Hz (24 dB/octave) :contentReference[oaicite:5]{index=5}
Dimensions (H × W × L): 1-11/16″ × 2-3/4″ × 7-3/8″ (4.3 × 7 × 18.7 cm) :contentReference[oaicite:6]{index=6}
Included Accessories: Auto-EQ microphone with selector switch, fuse holder, installation hardware :contentReference[oaicite:7]{index=7}
Primary Features: Auto-EQ (40-band), Start/Stop compatibility, FIT2™ integration, bi-amp capable, auto compressor, auto time alignment, auto level adjustment (bi-amp), auto speaker size detection, Kicker EQ presets, 24 dB crossovers, selectable HP filters (60/80/120 Hz) :contentReference[oaicite:8]{index=8}
Warranty: 2 Years (Authorized Kicker Dealer or kicker.com) :contentReference[oaicite:9]{index=9}