1、Space Saving Design: The car subwoofer combines the amplifier and subwoofer into one, effectively saving space in your vehicle. Enjoy powerful bass without sacrificing valuable interior space. 2、Pulse Width Modulation (PWM): The subwoofer utilizes PWM technology to eliminate current sensing losses and secondary feedback circuits, allowing for precise control of output voltage and current, ensures optimal performance and efficiency. 3、Variable Low Pass Filter: The subwoofer features a variable low pass filter that eliminates all notes below the set filter frequency, allows for customizable sound tuning and ensures that only the desired frequencies are produced. 4、Variable Bass Boost: Adjust the bass to your preferences within the enhancement range. The subwoofer provides subtle rumble, allows you to tailor the low end sound to your liking. 5、Automatic Shut Off: The built in amplifier in this subwoofer system automatically shuts off when you turn off the music signal. High strength speaker protective cover protects the speakers better. Item Type: Car Subwoofer Material: Aluminum Alloy Voltage Supply: DC12V Rated Power: 600W Maximum Power: 800W Total Harmonic Distortion:<0.4% SNR: >90dB Frequency Response: 20‑150Hz High Level Input Sensitivity: 0.9V 1 x Car Subwoofer 1 x Volume Extension Cable 1 x Instruction Manual 1 x Connection Cable 1 x Screw Pack