Polk Audio React Soundbar for Surround Sound TV Speaker Home? Famed for their powerful hi-fi speakers, Polk have transferred their expertise to this equally impressive soundbar. The Polk React uses twin passive radiators for deep, powerful sound. Where TVs distort and sound compressed, this Polk soundbar powers ahead with its smooth, dynamic sound. If you’re worried about disturbing others near-by, simply switch to Night Mode to rein in the React’s powerful sound. ARC – Audio Return Channel. 20 Hz – 20,000 Hz. Power Consumption – Normal Use (W). Power Consumption – Standby. Dimensions: WxHxD 864 x 57 x 121. HDMI Cable, Optical Digital Cable.