Newegg offers the Polk Audio PSW505 300-watt 12" Powered Subwoofer in Black, model no. PSW505, for $249.95. Coupon code "EMCWPHG22" cuts it to $169.95. With free shipping, that's tied with our mention from two weeks ago and the lowest total price we could find by $53. It features a frequency response of 23Hz to 160Hz, automatic on/off switch, magnetic shielding, adjustable crossover, phase switch, and volume control. Deal ends October 29.