It's amazing to think that so much sound can come from a speaker you barely notice. But that's exactly what the W670 does. Thanks to a 6-1/2" polypropylene woofer paired with a 1" silk-dome tweeter and bass/treble contouring, this remarkable two-way unit puts out sound in a big way. Beautiful!     Design: 2-Way in-wall Tweeter: Pivoting 1” silk dome Woofer: 6.5” Polypropylene cone with rubber surround Sensitivity: 91dB Frequency Response: 36Hz-20kHz Impedance: 8Ω Power Handling: 5-100 Watts Speaker Dimensions: H12-1/4” X W8-3/16” X D3-1/8” Cut-Out Dimensions: H10-7/8” X W6-3/16”