The ideal power range for car speakers can vary depending on the specific speakers and the size of your car’s audio system. In general, it is best to match the power handling capacity of your speakers to the power output of your car’s head unit or amplifier. If the power output of your head unit or amplifier is too high for the speakers, the speakers could be damaged. If the power output is too low, the sound quality of the system may suffer. It is generally recommended to choose speakers with a power handling capacity that is within a few watts of the maximum power output of your head unit or amplifier to ensure optimal performance.