Polk Audio is staging a contest that will put F/X Wireless Surround speakers into the hands of happy surround buffs. You can enter every day between now and March 31, 2011. No purchase is required.

The F/X Wireless Surround looks more like a squat subwoofer than a surround speaker. This unorthodox product is designed to be placed behind the main seating area, providing surround effects without intruding into the room.

Inside the speaker are four 2.5-inch full-range drivers and a 5.25-inch woofer, guided by Plk's Controlled Dispersion Array (CDA) technology. A three-position DSP switch allows flexibility in placement: on floor, sofa-back table, or shelf mount.

The F/X Wireless Surround normally sells for $400. See the Polk website for sign-up information and rules (PDF).