The Smart 4-Channel Amplifier transforms your in-car audio by delivering powerful, clean, and intelligently optimized sound. With 200 watts of dynamic output, it brings clarity and depth to your music, whether paired with factory or aftermarket speakers. Its advanced built-in Dsp and Auto-eq technology automatically tune your system using the included calibration microphone, creating a balanced, dynamic soundstage tailored to your vehicle. The KEY200.4 is compact enough to fit almost anywhere while still offering premium features like speaker-level and Rca inputs, bi-amp capability, and smart auto-turn-on functionality. Designed for easy integration into modern vehicles, it runs on a 12V electrical system and provides exceptional clarity even at high volumes. Perfect for drivers who want a dramatic upgrade in audio performance without replacing their entire sound system.