W667 InWall Series Whole House Series W667 ‹ › Technical Data: 6½" Polypropylene Woofers 3/4" Soft Dome Tweeter Power Handling75 Watts Frequency Response45Hz – 20kHz Impedance8Ω Sensitivity90dB 1W/1m Dimensions (H x W x D)12¼" x 8-3/16" x 3-3/16" Wall Cut Out (H x W)10-7/8" x 6¾" Replaces W665 Inwall Speaker