If you're planning to set up a home theater system, speakers alone won't be enough. One of the key components for setting the right sound for movies, games or music will be an active subwoofer. This is a special speaker system that will provide you with lower frequencies (20 to 200 Hz). The subwoofer will literally help you feel music or other sound thanks to the prominence of low frequencies. Experience the film or musical compositions exactly as the author himself prepared it for you. Moreover, you can place this helper anywhere. It's about whether your room is acoustic enough. Musicians will also use the subwoofer.