The Polk Audio Signature Elite ES10 is a 10-inch, 200-watt powered subwoofer designed to enhance midsize home theater and music systems with deep, precise bass. Key features include a forward-firing, long-throw 10-inch woofer, a robust Class D amplifier, and an acoustically optimized, reinforced cabinet with Power Port technology for clean, distortion-free lows. It also has advanced controls like Time-Smart Phase Control and a lowpass filter for seamless integration with other speakers.