The power that car speakers need depends on the size and type of the speakers, as well as the amplifier that is driving them. In general, car speakers are rated in terms of their power handling capacity, which is measured in watts. The size of the speaker, the materials used in its construction, and the type of design all play a role in determining its power handling capacity.
In general, it is recommended to match the power output of the amplifier to the power handling capacity of the speakers. If the amplifier is too powerful for the speakers, it can cause them to overheat and fail. On the other hand, if the amplifier is not powerful enough, the speakers will not be able to reach their full potential and may sound distorted.
To determine the power needs of your car speakers, you will need to refer to the manufacturer’s specifications for the speakers and the amplifier. It is always a good idea to err on the side of caution and choose an amplifier with a lower power output if you are unsure of the power needs of your speakers.