For its newsletter subscribers only, offers the Polk Audio Monitor 50 Floor-Standing Speaker in Maple for $89.99 each. Coupon code "EMCBCBKAJ" cuts it to $84.99. With free shipping, that's $9 over our mention from earlier in the week, but the lowest total price we could find. It features two 5-1/4" woofers, a 1" dome tweeter, 42Hz to 25kHz frequency response, and more. Note: This price is for a single speaker. Deal ends December 24.