4-Way System, Rubber Surround, Polypropylene Cone, Stamped Steel Basket 2.28" (58 mm) Midrange. 0.71" (18 mm) Dome Tweeters, Max Power: 800 W Nominal Impedance: 4 Ohms, Frequency Response: 45 Hz-20 kHz, System Sensitivity (1 W/1 m): 89 dB 6dB/Oct High-Pass Filter, Overall Diameter: 9.25" x 6.42" / 235 x 163 mm Installation Hole Diameter: 8.55" x 5.85" / 217 x 149 mm Mounting Depth: 3.47"/ 88 mm, Mounting hole – 5.82” x 6”, Grill Protrusion: 2.3"/ 33 mm Overall Speaker w/Grill: 10.2" x 7.52"/259 x 191 mm Tweeter Protrusion: 0.44"/ 11 mm, Outer Motor Diameter: 4.97"/ 126 mm, Dimensions: 7” x 9” x 4”, Weight: 10 Lbs. (Pair) BOSS Audio Systems provides a powerful 3-year platinum online dealer warranty so long as the purchase is made through Amazon.com. We strongly encourage professional installation of this product to ensure proper and safe functionality