Polk ES 12 active sub

The 12" Signature Elite ES12 subwoofer enhances the largest home-theater and music systems. Equipped with a robust Class D amplifier, Power Port™ technology, and Time-Smart Phase Control, the ES12 delivers impactful bass with unparalleled precision. Its sleek cabinet complements Signature Elite systems and fits anywhere.
Forward-firing long-throw 12" woofer
Acoustically optimized cabinet
Two internal Power Ports
Advanced DSP
Time-Smart Phase Control