Newegg offers the Polk Audio 300-watt 12" Powered Subwoofer in Black, model no. PSW505, for $199.95. Coupon code "EMCWWWB67" cuts it to $169.95. With free shipping, that's tied with our mention from a month ago and the lowest total price we could find by $65. It features a frequency response of 23Hz to 160Hz, magnetic shielding, volume control, an automatic on/off switch, phase switch, and adjustable crossover. Coupon expires November 24.