Boston Classic Series CPS 10Wi Wireless-Ready Subwoofer delivers all the thunder, performance and value you expect from a Boston Acoustics product- without the clutter. Thanks to our patented BassTrac® circuitry, each wireless-ready subwoofer produces clean bass and brings your favorite music and movies to life. You get tight, distortion-free bass at ALL OUTPUT LEVELS. With the optional WT-50 wireless transmitter, you can tuck away these power-packed subwoofers in any part of the room- up to 50 feet away.