Newegg offers the Klipsch KW-100 120-volt Subwoofer, for $129.99. Apply coupon code "VISACHECKOUT" and checkout with Visa Checkout to drop the price to $116.99. With free shipping, that's the lowest total price we could find by $42. It features an integrated 225-watt peak (55-watt continuous) amplifier, 10" down-firing fiber-composite cone woofer, and frequency response of 29Hz to 120Hz. Deal ends October 31.