Adorama offers the open-box Polk Audio LSiM 704c Center Channel Speaker in Midnight Mahogany for $269.99 with free shipping. That's $50 under our March mention of a new unit and the lowest price we've seen. (It's the best deal by $480 for a factory-sealed unit today.) It features a 3.25" mid-range driver, 1" tweeter, dual 5.25" woofers, 70Hz to 30kHz frequency response, and 8-ohms impedance.

Also available is an open-box pair of Polk Audio LSiM 703 Bookshelf Speakers in Mt. Vernon Cherry for $499.99 with free shipping. That's $150 under our January mention of a sealed unit and the lowest price we've seen. (It's $1,000 below the best price we could find for a factory-sealed pair today.) Features include midrange drivers, ring radiator tweeter, 6.5" mid-woofer, frequency response of 36Hz to 40kHz, and dynamic balance transducers.

A 5-year Polk warranty applies to both.