It is a Dual Cone Coaxial Speaker, which means that it lacks a conventional Tweeter, it has two cones, a bigger cone of 4 inches for the bass and middle, the second cone is a smaller unit for the treble. It has a RMS power handling of 20W and a Peak Power Handling of 100W which is low but still better than a factory speaker. The sensitivity is 85dB (2.83V,1m) ,frequency response of 80-15000 Hz, impedance of 4 ohms. There is no crossover and the speakers are not sold with speaker grills. It will do the job but donot expect too much from this speaker because it is cheap (infact cheapest car speaker that JBL makes).