C651 InCeiling Series Home Theatre Speaker System C651 ‹ › Technical Data: 6½" Polypropylene Woofer 1" Pivoting Silk Dome Tweeter Woofer and Tweeter Bridge Fixed at a 15˚ Angle Power Handling100 Watts Frequency Response45Hz – 20kHz Impedance8Ω Sensitivity91dB 1W/1m Diameter x Depth9¼" x 5" Ceiling Cut Out8¼" Replaces C650 Ceiling LCR Speaker