Architech Prestige Ps-611 6.5-Inch Kevlar Single-Point Stereo Ceiling Speaker 140W Max 6.5-Inch Woven Kevlar Woofer With Butyl Rubber Surround Dual .75-Inch Lens-Free Aluminized Ferro-Fluid Cooled, Pivoting Dome Tweeters Imp: 8_ Sensitivity: 91 Db