BOSS Audio SK553 275 Watt (Per Pair), 5.25 Inch, Full Range, 3 Way Car Speakers (Sold in Pairs) Impedance: 4 Ohms, Frequency Response: 85 Hz - 20 kHz, Sensitivity: 90 dB Woofer Cone: Poly Injection, Voice Coil: 1 Inch Aluminum Surround: Rubber, Basket: Stamped One Tweeter and One Polyimide Cone Midrange Per Speaker Included: Grills and Magnet Covers Dimensions: Depth 5.1 x Width 5.1 x Height 2.5, Weight Per Pair: 3.1 Lbs. 3 Year Platinum Online Dealer Warranty