Polk Audio PSWi225 8" Wireless Subwoofer

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 Logic^TM 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.