Klipsch SW-350 8″ Subwoofer for $169.99. Order online for in-store pickup at Best Buy to lock in the price, ensure availability, and save on shipping. Otherwise, shipping is $23.25 for a total of $193.94 shipped. Here is a screenshot for your reference. It features an 8″ fiber-composite down firing woofer, 31 to 120Hz frequency response, Class D amplifier, and Bass-reflex enclosure. Most places have this subwoofer for about $299 or more.