Buy.com has Polk Audio PSWi225 Wireless Powered Subwoofer - Black - PSWI225 for $180.62 + free shipping.
Wireless Convenience No additional (and expensive) LFE cable needed; no audio wires needed at all. Put your subwoofer anywhere you want it, and sacrifice nothing for the convenience. Plug the sub into a nearby wall outlet, connect the transmitter, and you're done. Onboard Polk Digital LogicTM uses advanced auto-sensing to determine the signal your system is sending (LFE or Line Level), and it instantly responds, selecting the appropriate low-pass filter. The 2.4-Gigahertz Wireless Transmitter is state-of-the-art, interfaces easily with any system, and can be put anywhere in your room.It's A Stimulus Package For Your TV Dollar for dollar there is no more economical way to add real drama and impact to your TV sound than with a subwoofer. It fills in the bass effects that your TV speakers cannot come close to reproducing. And for Polk Audio high performance and compact wireless convenience, the PSWi225 is the logical choice. Compact, Powerful...Wireless! The PSWi225 Wireless Subwoofer add...
Features
2.4 Gigahertz Wireless Transmitter connects to any system and allows you to place the PSWi225 anywhere in your listening area without the hassles of running wires
Amp Power - 100 Watts
Built-In Subwoofer Power Amp With Active Crossover offers the control you need for real home theater thrills and big, musical, accurate bass with any speaker system
Can Be Conveniently Placed Anywhere In The Room.The subwoofer's compact design allows it to be easily hidden away
Computer-Modeled Flared Port Design for maximum efficiency and output
Connects In Minutes To Any Audio System
Crossover Freq - 40Hz-180Hz
Dimensions - 12 1/2 W x 13 H x 12 1/2 D
Floor Firing Wireless Powered Subwoofer in a compact ported enclosure features a rugged long-throw Dynamic Balance co-polymer driver with butyl rubber surround for maximum performance and reliability
Measuring A Compact 12 1/2 W x 13 H x 12 1/2 D, the PSWi225 never calls attention to itself, until you turn it on
No Expensive Cables Required For Hookup - Long runs of expensive cable are a thing of the past, because you don't need any cables
Non-Resonant Heavy-Duty MDF Construction with internal bracing for deep bass impact with superior detail, accuracy and musicality
Polk Digital Logic makes set up even easier because the wireless transmitter's auto sensing function sends data for LFE or line level connection
Powerful 100 Watt Amplifier features adjustable low-pass crossover, phase switch and subwoofer volume control
Weight - 21 lbs
Polk Audio PSWi225 Wireless Powered Subwoofer - Black - PSWI225 $180.62 FS 
