Niles CM850Si (Ea.) 8-Inch Stereo Input Loudspeaker with Pivoting Tweeter Integrated Woofer/baffle Design Delivers Greater Low Frequency Response By Employing An 8 Woofer Dual Voice Coil, Injection-molded TCC (talc, Carbon And Ceramic) Filled Woofer Reproduces Left And Right Channel Inputs From A Single Speaker Butyl Rubber Surround Damps Resonance And Provides Exceptional Durability Dual 1 Pivoting Fluid-cooled Teteron Dome Tweeters Provide Wide Dispersion For Clear And Detailed High Frequencies Bridge-mounted Stereo Imaging (SI) Tweeter Array Directs The High Frequency Sounds From Both The Left And Right Channels At Opposing Angles To Preserve Stereo Separation