If you are looking to replace one or more of your current car speakers with a new, more powerful one with little hassle, the BRS Series Dual-Cone Full-Range Replacement Speaker (3-1/2 in.) from Boss is the ideal solution for you. The dual-cone design provides ideal sound clarity. With universal mounting holes, its easier than ever to renew your current setup with Boss. Dimensions: 3.4 x 3.4 x 1.7 inches Impedance: 4 ohms Mounting Depth: 1.6 inches, Mounting Hole: 3.1 inches Item Weight: 0.66 Lbs. (pair) Frequency Response: 100 Hz to 18 KHz