OSD Audio MK840 8-inch Polypropylene 175-Watt In-Ceiling Speaker with Bass and Treble Swtich, Pair Woofer: 8" Polypropylene Cone | Tweeter: Pivoting 1" titanium dome Contour Switches: 3dB Bass and 3dB Treble Power handling: 175W | Impedance: 8 Ohms Frequency Response 32Hz - 22kHz | Sensitivity 92db Cut-Out Diameter: 9 7/8" | Unit Dimension: Diameter 10 3/4" X Depth 4 7/8" Shipping: This item does not ship outside the U.S