1、Space Saving: 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: 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、Protective Speaker Cover: The subwoofer comes with a high strength protective cover that effectively protecting the speaker, ensures the longevity and durability of the subwoofer, protecting it from damage and wear.