1、SUPERIOR PERFORMANCE: Pulse width modulation PWM simplifies the power supply. Not only does it eliminate output current sensing losses, but it also eliminates all secondary feedback circuits, precisely controlling output voltage and current. 2、VARIABLE LOW PASS FILTER: The 600W powered car subwoofer's low pass filter is an electronic circuit that eliminates all notes below the filter frequency setting. 3、VARIABLE BASS BOOST: The car subwoofer's variable bass boost allows you to adjust the bass to your liking within the boost range. 4、TWEETER AND PROTECTIVE COVER: The 600W powered car subwoofer is equipped with a tweeter, and a high strength horn shield to better guard the speakers. 5、SLIM DESIGN: The 600W powered car subwoofer features a compact 10 inch slim design that can easily fit into any car space without compromising performance.