RSound-CM6T is a 2-way ceiling loudspeaker with 6.5 "woofer. The woofer cone is made of polypropylene, which allows the RSound-CM6T to be used in humid rooms and provides very low distortion. To expand the reproducible frequencies, the RSound-CM6T has a built-in tweeter with a dome cone 1" from silk. RSound - CM6T is ideal for both music and speech. The loudspeaker frame is made of high-quality ABS plastic. RSound - CM6T can connect to both 100V and low impedance audio amplifiers.