Polk ES 10 active sub

ES 10 SUBWOOFER
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This versatile 10" subwoofer enhances low-end performance of midsize home-theater and music systems with a robust amplifier, Power Ports, and advanced controls. Equipped with a robust Class D amplifier, Power Port technology, and Time-Smart Phase Control, the ES10 subwoofer delivers balanced, impactful bass with unparalleled precision. Its sleek cabinet complements Signature Elite systems and fits anywhere.
Forward-firing long-throw 10" woofer
Acoustically optimized cabinet
Two internal Power Ports
Advanced DSP
Time-Smart Phase Control