Newegg offers the Pioneer 100-watt 8" Powered Subwoofer in Black, model no. SW-8-K, for $69.99. Apply coupon code "CITIWALLET" and check out via MasterPass to cut it to $49.99. With $1.99 for shipping, that's $20 under our mention from last month and the lowest total price we've seen in more than a year. (It's a current low by $41.) It features a 38Hz to 150kHz frequency response, built-in 100-watt amplification, and bass-reflex enclosure.