Kicker 53KEY200.4 Smart 4-Ch. Amplifier (auto-EQ/processor)

The Kicker 53KEY200.4 (commonly referred to as the Kicker KEY200.4) is an ultra-compact 4-channel smart car amplifier and Digital Signal Processor (DSP) in one package. It delivers 50 watts RMS x 4 channels at 4 ohms.

What makes this amplifier incredibly popular is its built-in artificial intelligence (AI). By using an included setup microphone, the amp automatically runs a 40-band self-tuning equalizer, sets electronic crossovers, and fixes time-alignment for your car's specific cabin acoustics in less than five minutes.

• Smart Tuning Algorithm: Automatically flattens ugly factory stereo EQ curves and creates a balanced soundstage with the push of a button. 
• Ultra-Compact Chassis: Measuring less than 8 inches long and 2 inches tall, it easily hides right behind your dashboard radio, in the glove box, or under a seat. 
• Bi-Amp Mode: Can be switched into a special mode where channels 1 and 2 run your front tweeters while channels 3 and 4 run your front door woofers, automatically setting the active crossovers for them. 
• FIT2™ Technology: Fail-Safe Integration Technology allows the amplifier to accept speaker-level signals from factory radios without needing a separate line output converter (LOC). 
• Start/Stop Compatible: Engineered to keep playing smoothly without shutting down or making clicking noises when newer vehicles automatically turn their engines off and on at stoplights. 

Technical Specifications:

• RMS Power Output: 50 Watts x 4 channels at 4 Ohms
• Total Peak Power: 400 Watts
• Chassis Size: 7-3/8 inches long by 3-11/16 inches wide by 1-11/16 inches high
• Digital Signal Processor: Built-in auto-tuning 40-band equalizer
• Acoustic Correction: Automatic time alignment and auto-crossover setup
• Included Accessory: Omnidirectional setup microphone with a selector button switch
• Frequency Response: 20 Hz to 20,000 Hz
• Signal-to-Noise Ratio: Greater than 90 dB
• Low-Level RCA Input Sensitivity: 250mV to 10V
• High-Level Speaker Input Sensitivity: 1V to 40V
• FIT2™ Integration: Prevents factory radio error codes and shuts off DC offset noise
• Turn-On Triggers: 12V remote wire, DC offset sensing, or Audio Signal sensing
• Bi-Amp Mode Switch: Splits the 4 channels into dedicated front tweeter and front woofer outputs
• Start-Stop Protection: Stays fully powered down to 6 Volts during vehicle engine restarts
• Total Weight: 1.3 pounds