Electronics Expo via Newegg offers the Klipsch Reference Series 10" 200-watt Powered Subwoofer, model no. SW-110, bundled with a $75 Newegg Gift Card for $299.99 with free shipping. Assuming you'll spend the gift card, that's $375 off and the lowest total price we could find. It features a 10" front-firing woven-fiberglass driver, dynamic power rating of 450 watts, and frequency response of 28Hz to 120Hz.