The Polk Audio Signature Elite ES8 is a compact 8-inch powered subwoofer designed for home theater systems, delivering deep bass with a 100-watt Class D amplifier. Key features include a front-firing long-throw woofer, Power Port technology to minimize turbulence and distortion, and Time-Smart Phase Control for precise blending with other speakers. Its design is compact and sleek, making it suitable for small spaces, and it includes an advanced digital signal processor (DSP) and an auto-sensing power-save mode.